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Our understanding on the interplay between gene functionality and gene arrangement at different chromosome scales relies on a few Diptera and the honeybee, species with quality-reference genome assemblies, accurate gene annotations, and abundant transcriptome data. Using recently generated 'omics resources in the monarch butterfly D. plexippus, a species with many more and smaller chromosomes relative to Drosophila species and the honeybee, we examined the organization of genes preferentially expressed at broadly defined developmental stages (larva, pupa, adult males, and adult females) at both fine and whole-chromosome scales. We found that developmental stage-regulated genes do not form more clusters, but do form larger clusters, than expected by chance, a pattern consistent across the gene categories examined. Notably, out of the thirty chromosomes in the monarch genome, twelve of them, plus the fraction of the chromosome Z that corresponds to the ancestral Z in other Lepidoptera, were found enriched for developmental stage-regulated genes. These two levels of nonrandom gene organization are not independent as enriched chromosomes for developmental stage-regulated genes tend to harbor disproportionately large clusters of these genes. Further, although paralogous genes were overrepresented in gene clusters, their presence is not enough to explain two-thirds of the documented cases of whole-chromosome enrichment. The composition of the largest clusters often included paralogs from more than one multigene family as well as unrelated single-copy genes. Our results reveal intriguing patterns at the whole-chromosome scale in D. plexippus while shedding light on the interplay between gene expression and chromosome organization beyond Diptera and Hymenoptera.

Previously, we reported final-instar lepidopteran larvae exposed to low doses of imidacloprid, clothianidin, and thiamethoxam had arrest in pupal ecdysis, which is a novel adverse outcome for neonicotinoid insecticides. Since neonicotinoids disrupt acetylcholine signaling, we hypothesized that the excitatory neurotransmitter acetylcholine plays a critical role in regulation of pupal ecdysis, likely by modulating the release of peptides from crustacean cardioactive peptide (CCAP) neurons. In this paper, using two lepidopteran species, we undertook studies with five additional nicotinic acetylcholine receptor (nAChR) agonists and three muscarinic acetylcholine receptor (mAChR) agonists to hypothesize the putative nAChR subunits that mediate pupal ecdysis. We also explored the potential role of mAChRs in regulation of pupal ecdysis. These findings, along with toxicokinetic analyses, suggest that pupal ecdysis may be mediated by the α1, β1, and β2 subunits of nAChRs without involvement of mAChRs. An analysis of ecdysis movements showed that neonicotinoid-treated lepidopteran larvae exhibited similar disruptions as observed in CCAP neuron-knockout Drosophila larvae. Based on findings to date, we hypothesize that acetylcholine regulates lepidopteran pupal ecdysis directly through CCAP neurons or by activating their upstream efferent inhibitory (likely GABA-releasing) neurons. Further studies are needed to elucidate the interplay between neuroendocrine hormones and neurotransmitters in lepidopteran pupal ecdysis. [ABSTRACT FROM AUTHOR]

MicroRNAs (miRNAs) are post‐transcriptional gene regulators. In the miRNA pathway's cytoplasmic part, the miRNA is processed from a hairpin‐structured precursor to a double‐stranded (ds) mature RNA and ultimately to a single‐stranded mature miRNA. In insects, ingesting these two ds forms can regulate the target gene expression; this inspired the trophic miRNA's use as a functional genomics and pest management tool. However, systematic studies enabling comparisons of pre‐ and mature forms, dosages, administration times and instar‐wise effects on target transcripts and phenotypes, which can help develop a miRNA administration method, are unavailable due to the different focuses of the previous investigations. We investigated the impact of trophically delivered Px‐let‐7 miRNA on the lepidopteran pest Plutella xylostella, to compare the efficacies of its pre‐ and ds‐mature forms. Continuous feeding on the miRNA‐supplemented diet suppressed expressions of FTZ‐F1 and E74, the target ecdysone pathway genes. Both the pre‐let‐7 and mature let‐7 miRNA forms similarly downregulated the target transcripts in all four larval instars. Pre‐let‐7 and let‐7 ingestions decreased larval mass and instar duration and increased mortality in all instars, exhibiting adverse effects on larval growth and development. miRNA processing Dicer‐1 and AGO‐1's upregulations upon miRNA ingestion denoted the systemic miRNA spread in larval tissues. The scrambled sequence controls did not affect the target transcripts, suggesting the sequence‐specific targeting by the mature miRNA and hairpin cassette's non‐involvement in the target downregulation. This work provides a framework for miRNA and target gene function analyses and potentiates the trophic miRNA's utility in pest management. [ABSTRACT FROM AUTHOR]

Oak processionary moth (Thaumetopoea processionea) (OPM) Linnaeus, 1758 (Lepidoptera: Notodontidae) is a serious forestry pest and risk to public health in the UK. The economic and environmental cost of chemical pesticides in managing OPM has driven the need for sustainable, strategies which fit into integrated pest management frameworks, including the use of novel biocontrol methods such as conservation biocontrol.Carcelia iliaca Ratzeburg, 1840 (Diptera: Tachinidae), a specific parasitoid of OPM, is currently the main biocontrol agent of the UK OPM population. However, basic information on C. iliaca life history and rates of parasitism are currently lacking, partly driven by the risks OPM pose to human health, making both study and incorporation of biocontrol into management plans difficult.Here, we design and validate a molecular diagnostic assay based on loop‐mediated isothermal amplification (LAMP) to detect C. iliaca from OPM larval tissue samples collected in the field, overcoming the challenges of studying problematic invasive species such as these.To assess assay performance, diagnostic sensitivity, which was 91%, and specificity, which was 75%, are used alongside limit of detection (600 pg). We discuss the wider applications for LAMP as a cost‐effective tool for studying the natural enemies of insect pests which can be used to inform conservation biocontrol management strategies. [ABSTRACT FROM AUTHOR]

Sodium is essential for animals, and its heterogeneous distribution can cause a range of phenomena, from sodium‐seeking behaviours to impacting their performance. Although sodium content in soils and plants is relatively well documented, data for higher trophic levels are limited. Knowledge of the variation in sodium in lower trophic levels could have implications for understanding the behaviour and physiology of species at higher levels.We investigated the variation in tissue sodium concentration between males and females of four butterfly species. Puddling behaviour of Lepidoptera suggests sodium needs of males are generally greater than females, thus, we predicted males would accumulate more sodium than females on a given diet.Larvae were reared on plants (for Battus philenor, Chlosyne lacinia and Danaus plexippus) and an artificial diet (for Pieris rapae) under Low Na (no added sodium) and High Na (sodium added) conditions. Among species and sexes, we quantified and compared adult absolute tissue sodium concentrations and bioconcentration factors, which indicate net sodium accumulation or excretion relative to individuals' diets.On average, individuals on low‐sodium diets had higher bioconcentration values across all species. Male butterflies accumulated significantly higher sodium concentrations than females in two sodium treatments for B. philenor, and P. rapae and only in the High Na treatment for C. lacinia. However, in D. plexippus, individuals accumulate sodium in the High Na treatment, but males and females responded in the same way.Our study revealed sex‐ and species‐specific patterns of butterfly sodium accumulation, which could be linked to variations in behaviour and/or performance. Differences in sodium content across species have implications for variation in predation and trophic‐level interactions, an interesting avenue for future ecological and evolutionary research. [ABSTRACT FROM AUTHOR]

Resting animals are highly vulnerable to predation, making the location and manner in which they rest crucial for their survival. Some lepidopteran larvae and spiders rest while suspended in the air at night. Although previous studies have hypothesised that nocturnal suspended resting serves as an anti‐predator defence, this hypothesis has not yet been tested.We found that Pogonopygia nigralbata larvae (Lepidoptera: Geometridae: Ennominae) rest on leaves of the host plant Illicium anisatum (Austrobaileyales: Schisandraceae) during the day but hang from leaves by a thread at night. As some predators, such as praying mantises, centipedes and tree frogs, were observed on host plants at night, the larvae might hang from leaves to avoid encounters with these predators.To test this hypothesis, we artificially placed model prey (i.e., live mealworms) on I. anisatum trees during the day and at night. We compared the attack rates on model prey suspended from leaves with those directly attached to the leaves. Model prey were attacked more frequently during the day than at night. Suspended models were attacked less frequently than those attached leaves at night. A mealworm attached to a leaf was also consumed by a centipede at night. Additionally, centipedes were found more frequently on the host plant I. anisatum at night than during the day. Furthermore, our laboratory experiments showed that P. nigralbata larvae were frequently consumed by praying mantises and centipedes.Our results suggest that the nocturnal suspended resting of P. nigralbata larvae plays a crucial role in evading nocturnal predators, such as praying mantises and centipedes. [ABSTRACT FROM AUTHOR]

The identification of sex pheromones in native New Zealand moths has been limited, largely due to their minimal pest impact on agricultural ecosystems. The kōwhai moth, Uresiphita polygonalis maorialis, a native crambid, is known for its herbivory on Sophora spp. and Lupinus arboreus leaves. Understanding the chemical ecology of this species is essential for studying its behavior, population dynamics, and ecological interactions. In this study, the female sex pheromone of U. polygonalis maorialis was analyzed using coupled gas chromatography-electroantennogram detection (GC-EAD). This approach identified four antennally active compounds in the female gland extracts. Subsequent gas chromatography-mass spectrometry (GC-MS) and chemical derivatization revealed these compounds to be tetradecyl acetate (14:Ac), (E)-11-tetradecenyl acetate (E11-14:Ac), (Z)-11-tetradecenyl acetate (Z11-14:Ac), and (Z)-11-hexadecenyl acetate (Z11-16:Ac). Field trapping experiments evaluated various combinations of these four EAD-active compounds and (E)-11-hexadecenyl acetate (E11-16:Ac). Results indicated that traps baited with blends containing E11-14:Ac, Z11-14:Ac, and Z11-16:Ac captured significantly more males compared to unbaited delta traps. A blend ratio of 144:84:72 µg (E11-14:Ac: Z11-14:Ac: Z11-16:Ac) proved the most effective, capturing the highest number of males. Male captures were recorded from late November to late February, peaking in late December, suggesting a univoltine population in Canterbury. Among the three tested doses, the 300 µg and 1000 µg doses of the three-component blend were the most effective. The identification of the sex pheromone components of U. polygonalis maorialis provides a valuable tool for monitoring this species, contributing to a deeper understanding of its population densities and distribution within its native range. It also offers insights into the evolutionary development of pheromone communication within the genus, shedding light on species divergence and adaptation. [ABSTRACT FROM AUTHOR]

Many butterfly species are conspicuous flower visitors. However, understanding their flower visitation patterns in natural habitats remains challenging due to the difficulty of tracking individual butterflies. Therefore, we aimed at establishing a protocol to solve the problem using the Common five-ring butterfly, Ypthima argus (Nymphalidae: Satyrinae). Focusing on the pollen grains attached the butterfly’s body surface, we examined validities of two pollen analyses based on pollen morphology and DNA markers (ITS1 and ITS2), in addition to the classical route census method. We captured thirty-nine butterflies from mid-April to early July and collected pollen grains from each individual. Morphological and DNA analyses of collected pollens identified eighteen and thirty-four taxa of insect pollinated plants respectively, including woody plants such as Castanopsis. The DNA analysis detected as many as thirteen plant taxa from a single butterfly, indicating its high sensitivity for detecting flower visitation. We detected more plant taxa in May when many individuals were flying. This is assumingly related to the post emergence days of the butterflies with more foraging experience. We also found that fluctuations of pollen grain numbers of Leucanthemum vulgare and Erigeron philadelphicus on individual butterflies depend on their flowering periods overlapping partly. Consequently, we conclude that pollen morphology and DNA barcoding analysis, and field observations are mutually complementary techniques, providing an integrated pollen analysis method to study the pollination ecology of butterflies. [ABSTRACT FROM AUTHOR]

The correction notice in BMC Genomics addresses errors in the captions for Figures 1-3 and formatting issues in the reference list of an article on the genome assembly of the endemic butterfly Minois aurata. The corrected captions for the figures provide accurate descriptions of sample locations, genome characteristics, and phylogenetic analyses. The original article has been updated to reflect these corrections, ensuring the accuracy of the information presented. [Extracted from the article]

Trilocha varians is a member of the bombycid moths. Since T. varians has a considerably shorter generation period than the prevailing model species, Bombyx mori, this species would be a novel model insect in Lepidoptera. To facilitate further use of T. varians, we developed genome annotation information on the chromosome-scale assembly of T. varians previously published by our group. 9 RNA-seq datasets and 2 Iso-seq datasets were submitted for transcriptome-based gene prediction. As a result, 16,266 protein-coding genes were predicted on the latest genome assembly, and 98.6% of BUSCO sequences were present in our gene models. ATAC-seq was also conducted to determine chromatin accessibility across the genome. Finally, piRNA-targeted small RNA-seq revealed T. varians genome harbours 517 piRNA clusters (piCs). This information will encourage and facilitate potential users who plan to use this species. [ABSTRACT FROM AUTHOR]

The partitioning of global biodiversity into biogeographic regions is critical for understanding the impacts of global-scale ecological and evolutionary processes on species assemblages as well as prioritizing areas for conservation. However, the lack of globally comprehensive data on species distributions precludes fine-scale estimation of biogeographical regionalization for numerous taxa of ecological, economic and conservation interest. Using a recently published phylogeny and novel curated native range maps for over 10 000 species of butterflies around the world, we delineated biogeographic regions for the world's butterflies using phylogenetic dissimilarity. We uncovered 19 distinct phylogenetically delimited regions (phyloregions) nested within 6 realms. Regional boundaries were predicted by spatial turnover in modern-day temperature and precipitation seasonality, but historical climate change also left a pronounced fingerprint on deeper- (realm-) level boundaries. We use a culturally and ecologically important group of insects to expand our understanding of how historical and contemporary factors drive the distribution of organismal lineages on the Earth. As insects and global biodiversity more generally face unprecedented challenges from anthropogenic factors, our research provides the groundwork for prioritizing regions and taxa for conservation, especially with the goal of preserving the legacies of our biosphere's evolutionary history. This article is part of the discussion meeting issue 'Bending the curve towards nature recovery: building on Georgina Mace's legacy for a biodiverse future'. [ABSTRACT FROM AUTHOR]

This study reports a new species and a new record of Proctolaelaps. Proctolaelaps taiyuanensissp. nov. was found on the body surface of Dendroctonus valens LeConte (Coleoptera: Scolytinae); Proctolaelaps bickleyi (Bram) was collected from the culture medium of lab-raised Ostrinia furnacalis (Guenée) (Lepidoptera: Crambidae). An identification key to the species of Proctolaelaps from China is presented. [ABSTRACT FROM AUTHOR]

Novel traits in the order Lepidoptera include prolegs in the abdomen of larvae, scales, and eyespot and band color patterns in the wings of adults. We review recent work that investigates the developmental origin and diversification of these four traits from a gene-regulatory network (GRN) perspective. While prolegs and eyespots appear to derive from distinct ancestral GRNs co-opted to novel body regions, scales derive from in situ modifications of a sensory bristle GRN. The origin of the basal and central symmetry systems of bands on the wing is associated with the expression of the WntA gene in those regions, whereas the more marginal bands depend on two other genes, Distal-less and spalt. Finally, several genes have been discovered that play important roles in regulating background wing color, via the regulation of pigmentation GRNs. The identification of shared and novel cis-regulatory elements of genes belonging to these distinct GRNs helps trace the developmental and evolutionary history of these traits. Future work should examine the extent to which ancestral GRNs are co-opted/modified to produce the novel traits and how these GRNs map to specific cell types in ancestral and derived traits. [ABSTRACT FROM AUTHOR]

Simple Summary: Limacodidae, known for its high species diversity in tropical and subtropical regions, includes over 300 genera and 1700 species globally, with China hosting a significant number of these. In this study, we describe a new genus and species within the family Limacodidae from Guangxi and Jiangxi, China. The new genus and species, Guium nebulum gen. et sp. nov., displays unique morphological features, including distinct wing patterns and male genital structures that differentiate it from related genera. Through an analysis of the COI mitochondrial gene, we further confirmed the genus's monophyly. A new genus and species of Limacodidae, Guium nebulum gen. et sp. nov., is described based on specimens collected from Guangxi Autonomous Region and Jiangxi Province in China. The new genus shares certain morphological features, such as a well-developed labial palpus, with related genera like Tanvia Solovyev & Witt, 2009; Scopelodes Westwood, 1841; Hyphorma Walker, 1865; and Monema Walker, 1855. However, the new genus can be separated from them by the wing venation and the male genital characteristics. COI molecular marker analysis further supports the monophyly of this new genus, indicating a close relationship with Scopelodes. [ABSTRACT FROM AUTHOR]

Mitochondrial genomes provide powerful insights into insect phylogeny and molecular evolution, aiding in the clarification of complex taxonomic relationships. Within the swallowtail butterfly subfamily Parnassiinae (Lepidoptera: Papilionidae), an insect group of significant environmental and economic importance, essential aspects of phylogenetic positioning remain unresolved. This study presents the first sequencing and annotation of the complete mitogenome for Parnassius stubbendorfii from two geographically distinct populations in Gansu Province, China. Both mitogenomes are circular, double-stranded molecules, measuring 15,377 bp and 15,348 bp in length, each encoding 37 standard mitochondrial genes: 13 protein-coding genes (PCGs), 22 transfer RNA genes, 2 ribosomal RNA genes, and an A + T-rich control region. The gene arrangement is highly conserved and typical of Lepidoptera. Phylogenetic analyses based on both the 13 PCGs and the complete set of 37 mitochondrial genes supported the placement of Parnassiinae as a subfamily within Papilionidae, with Parnassini and Zerynthini identified as two distinct clades within Parnassiinae. Notably, tree topologies derived from the 13 PCGs alone exhibited slight deviations from those based on the full mitogenome, underscoring the need for expanded mitogenomic data across Papilionidae to further refine evolutionary relationships. [ABSTRACT FROM AUTHOR]

Chilades pandava (Horsfield) (Lepidoptera: Lycaenidae) is a notorious defoliating pest of Cycas spp. (Cycadaceae) in the tropical and subtropical regions of the world. The primary visual receptors of butterflies are the compound eyes. To understand the perception of visual stimuli in Ch. pandava, the external morphology and internal microstructure of Ch. pandava compound eyes were examined using light and scanning electron microscopy. The number of ommatidia was approximately equal in both sexes, and the eyes of Ch. pandava are of the apposition type, with the crystalline cone directly connected to the rhabdom. Significant differences were observed in the length of the crystalline cone and the width of retinula cell nucleus and crystalline cone under light-adapted conditions compared to those under dark-adapted conditions. Under light-adapted conditions, pigment granules moved to and remained below the crystalline cone and were near the rhabdom. In contrast, under dark-adapted conditions, pigment granules moved to the distal end of ommatidia, near the cornea, and exhibited a more spatially distributed pattern. These results provide essential information for exploring the poorly understood sensory ecology of butterflies in the family Lycaenidae. [ABSTRACT FROM AUTHOR]

The fall armyworm, Spodoptera frugiperda (J. E. Smith) (Lepidoptera: Noctuidae), is a highly destructive agricultural pest. The ability of S. frugiperda to survive and reproduce is widely recognized, but it is also important to consider the role of larval cannibalism as a significant biological trait. Understanding the cannibalistic habits of pests helps to explore the dynamics and evolution of their populations and facilitates the monitoring of insect outbreaks. Therefore, the stages, densities, and intensity of cannibalism in S. frugiperda larvae, as well as the consequences for their development, were investigated under laboratory conditions. Spodoptera frugiperda larvae showed obvious cannibalism after the third instar even in the presence of maize (Zea mays L., Poaceae) leaves; cannibalism was not observed in first instars. In the case of only one cannibal, the percentage of prey consumed by cannibalism decreased with higher prey density, and the predatory functional responses of fourth‐ to sixth‐instar predators to first‐ to third‐instar preys were fitted using the Holling II model. Compared with larvae feeding on maize only, larvae feeding on a diet of maize supplemented with third‐instar conspecifics had a longer developmental duration and a higher body weight, with no significant differences in larval survival, pupation, or eclosion rates. Larvae supplied with conspecifics only, in the absence of maize leaves, generally had a lower body weight than larvae supplied with maize only, although developmental duration was still longer, and longevity and fecundity rates were lower for these larvae. Overall, consuming a small quantity of conspecifics in addition to maize leaves prolonged the developmental duration of larvae and pupae to some extent, increased the body weight, and did not impact the longevity or reproduction of S. frugiperda. However, cannibalism only, without access to maize leaves, had a detrimental effect on adult longevity and reproduction. These findings could serve as a valuable reference for studying the life history of insects that consume agricultural crops and may have potential applications for biological control. [ABSTRACT FROM AUTHOR]

The fall armyworm (FAW), Spodoptera frugiperda (J.E. Smith) (Lepidoptera: Noctuidae), is an important insect pest of maize (Zea mays L., Poaceae). The use of synthetic insecticides to control this pest remains the most popular option amongst growers. Natural insecticides offer a safer alternative to synthetic insecticides for controlling FAW. This study aimed to investigate the lethal and sublethal effects of a calcium carbonate formulation against this invasive insect pest. The tested formulation was a mixture of calcium carbonate (five concentrations), wetting agent and dispersant agent. Four experiments were conducted including a direct contact test, a no‐choice feeding test, a choice feeding test and an oviposition test. The application of the calcium carbonate formulation on maize leaves had a strong anti‐oviposition effect for adult female FAW, but a low‐to‐moderate antifeedant effect on FAW larvae. The growth and development of FAW larvae were only slightly affected by the calcium carbonate formulation in the feeding and the direct contact tests. The lethal effects of the calcium carbonate formulation against FAW larvae were low in direct contact and feeding tests. These results indicate that a calcium carbonate formulation has the potential to be used as the push component in a push–pull strategy for FAW control. Considering its low toxicity, both through direct contact and feeding, calcium carbonate can be an environmentally friendly alternative for the management of FAW. [ABSTRACT FROM AUTHOR]

Diatraea saccharalis Fabricius (Lepidoptera: Crambidae), known as sugarcane borer, is the most damaging pest of sugarcane (Saccharum officinarum L., Poaceae) in northwestern Argentina and it causes significant losses in sugar and ethanol production. Currently, chemical and biological controls are used, along with host plant resistance, but there is a clear trend toward adoption of integrated pest management strategies. Considering the potential environmental and health risks associated with using agrochemicals, our study focuses on utilizing bioactive natural products, specifically plant secondary metabolites. Senecio rudbeckiaefolius Meyen & Walp (Asteraceae) is a perennial shrub found in southern Peru, Bolivia, and northwestern Argentina, valued for its use in traditional medicine. The main compounds of the genus Senecio are sesquiterpenes, with some species containing pyrrolizidine alkaloids (PAs), known for their harmful effects on herbivorous insects and vertebrates. Plant extracts exhibit several modes of action, encompassing confusion, feeding deterrence, growth regulation, insecticidal, and repellent effects. Our goal was to analyze the chemical composition of an ethanolic extract (EE) of S. rudbeckiaefolius and evaluate its lethal and sublethal effects on D. saccharalis larvae. We also investigated the potential target sites affected by the ingestion of an alkaloidal fraction from the EE (AFEE) through a midgut histological study. The main secondary metabolites identified were the PAs and phenolic compounds, with the highest concentrations found in the flowers and leaves. The majority of the PAs identified were senecionine and integerrimine. Toxicity bioassays were carried out with larvae fed on a diet supplemented with an EE of S. rudbeckiaefolius. Concentration‐dependent mortality and a marked inhibition of larval growth were recorded. We described the midgut histological structure and compared it with that of AFEE‐fed larvae. Various morphological changes were observed in the intestinal epithelium, especially an increase in the number of goblet cells and pronounced acidophilic secretion in the lumen. These results suggest that the EE of S. rudbeckiaefolius could be promising for D. saccharalis control. [ABSTRACT FROM AUTHOR]

Fall armyworm (FAW), Spodoptera frugiperda (J.E. Smith) (Lepidoptera: Noctuidae), has a long association with maize (Zea mays mays L., Poaceae) and is among the crop's most significant pests worldwide. We contrasted the preference for and performance of FAW on three maize cultivars: the Mexican landrace Tuxpeño, the USA inbred B73 and B73‐lox10; B73‐lox10 is deficient in production of jasmonic acid (JA), green leaf volatiles (GLVs) and herbivore‐induced plant volatiles (HIPVs). Female oviposition and neonate colonization preferences were assessed in triple‐choice tests in greenhouse settings. Performance was assessed on the bases of larval, pupal and adult weights, larval and pupal development times, and adult longevity. We expected females to preferentially oviposit on plants on which their offspring performed best, and neonates to randomly colonize plants because they disperse aerially, presumably oriented solely by wind currents. Females preferred to oviposit on Tuxpeño plants, followed by B73‐lox10 and B73 plants, whereas their offspring performed best on B73‐lox10 and poorest on Tuxpeño. In contrast, neonates preferentially colonized plants on which they performed best, B73‐lox10, though initially and transiently they colonized plants on which they performed poorly, B73 and Tuxpeño. Altogether, our results showed that FAW females preferred to oviposit on maize plants on which their offspring's performance was poorest (Tuxpeño), and neonates preferentially colonized plants on which their own performance was best (B73‐lox10), though they initially colonized plants that were detrimental to their performance (Tuxpeño, B73). These results suggested that the ovipositional choices of FAW mothers are uncoupled from their offspring's performance, but newborn offspring rectified their mother's sub‐optimal host plant choice by colonizing plants that enhanced their own performance. Notably, these results also suggested that aerially dispersing (ballooning) FAW larvae do not colonize plants randomly, and that plant volatiles (GLVs, HIPVs) and JA may be relevant to host plant selection by ballooning larvae. [ABSTRACT FROM AUTHOR]

Trehalase (TRE) is a key enzyme for degrading trehalose, which plays a vital role in the growth and development of insects. Although validamycin, a compound belonging to a class of efficient antibiotics and fungicides, can control pests by suppressing TRE activities, it remains unknown whether it acts on both trehalose and chitin metabolism in Spodoptera frugiperda (J. E. Smith) (Lepidoptera: Noctuidae), a major pest of maize (Zea mays L., Poaceae). This study investigated the changes in trehalose metabolism after validamycin treatment in S. frugiperda and its effects on the downstream chitin synthesis pathway. Compared with the control, S. frugiperda exhibited varying degrees of mortality after treatment with four concentrations of validamycin, showing a dose‐dependent increase in mortality rate. The mortality rates 24 and 48 h after treatment with 0.07 mg μL−1 validamycin were 35.6% and 42.2%, respectively, indicating the effective lethal concentration. Treatment with 0.07 mg μL−1 validamycin led to developmental delay, abnormal molting, and death in S. frugiperda, but it exerted no lasting effects on the survival rate, pupal weight, and phenotype during its subsequent developmental stages. At 24 h after validamycin treatment, TRE1 and TRE2 activities and glucose content decreased significantly, whereas the trehalose content increased significantly. Treatment with validamycin significantly upregulated TRE1 and TRE2 expression after 24 and 48 h and downregulated the mRNA expression of chitin synthase A and B genes. However, after 72 h, chitin content was not significantly affected. Hence, validamycin can destroy the dynamic transformation balance of trehalose and glucose by inhibiting the activities of the two TREs, and further affect the expression of downstream chitin synthase genes. These findings provide a theoretical basis for using TRE inhibitors to control S. frugiperda. [ABSTRACT FROM AUTHOR]

A long‐standing question in evolutionary biology is how historical biogeographic processes have shaped the current diversity of organisms, especially for highly diverse groups. We study the diversification dynamics and biogeographic processes of one of the most diverse families of Lepidoptera, Geometridae, with over 24,000 described species and a worldwide distribution. Despite the cosmopolitan distribution of the family, most species of Geometridae have limited distribution ranges. We present the largest historical biogeography and diversification study on the current diversity patterns and distribution ranges of Geometridae. We use a multi‐locus dataset of 1200 taxa to estimate the historical biogeography of Geometridae, implementing a Bayesian approach of the Dispersal‐Extinction‐Cladogenesis (DEC) model that incorporates palaeographic‐based dispersal graphs with uncertainty in geological ages in RevBayes. We also implement a Bayesian time‐variable, episodic birth–death model and a model that allows branch‐specific speciation rates to estimate the diversification dynamics in the family. Our results suggest that the most recent common ancestor of Geometridae was distributed in the New World, with the Neotropics being the most likely ancestral area. An increase in diversification rates occurred circa 30–40 million years ago (Mya), coinciding with a time of a major global climate cooling in the Eocene. Clade‐specific shifts in speciation rates also occurred around 10–15 Mya, coincident with another period of major climate change in the Oligocene. Our results point to different biogeographical and evolutionary histories per area to show the differences of the diversification rates in different biogeographical regions through time, showing the relative importance of each region in the diversification history of Geometridae. [ABSTRACT FROM AUTHOR]

Insect pests represent a threat to the integrity of historic buildings and homes, causing serious losses and irreversible damage. These pests can cause extensive damage to organic materials, including wood, textiles, and paper. Beetles, termites, booklice, moths, and cockroaches are just some of the main insect pests that are frequently found in historic buildings and homes. Beetle species such as the furniture beetle and the powderpost beetle are well recognised for their capacity to infest and feed on wood. Termite infestations can remain undetected and cause considerable damage that may even lead to the complete destruction of a building's structural integrity. Cloth moth larvae are known to damage textiles, including carpets, furniture, clothes, and tapestries. Some wood-destroying species of cockroaches have the potential to harm historic buildings. Booklice have the ability to eat cellulose fibres found in archived articles and artefacts stored in heritage buildings, causing deterioration and damage to documents over time. This article reviews the literature and presents an overview of the major insect pests belonging to five known orders Coleoptera, Blattodea, Lepidoptera, Zygentoma (long-tailed silverfish) and Psocoptera, which pose a threat to households, museums, depositories, libraries, and cultural heritage buildings. We also discuss their biology, their impact on human health, and the various potential approaches to identifying them. [ABSTRACT FROM AUTHOR]

Eriocraniidae (Lepidoptera) are widespread leaf miners and have unique adaptability to hypoxia and low temperatures, causing covert but devastating harm to Fagales (Betulaceae and Fagaceae) plants in the Holarctic. However, the lack of a high-quality genome of this most ancient family within the angiosperm-feeding group largely limits the studies on the phylogeny and environmental adaptation of the primitive Lepidoptera. In this study, utilizing Illumina sequencing, PacBio HiFi sequencing, and Hi-C technology, we constructed a chromosome-level genome assembly of E. semipurpurella alpina, representing the first high-quality genome in the Eriocraniidae family. The genome was 523.71 Mb in length, with a scaffold N50 of 17.55 Mb, and 95.56% of the assembly anchored onto 32 pseudochromosomes. BUSCO completeness values of 97.6%. 49.02% of the genome sequences were recognized as repetitive sequences, and a total of 22,581 protein-coding genes were annotated. This genome will greatly facilitate the phylogenomic studies of the most ancient lineages of Lepidoptera and provides insights into the genetic architectures underlying ecological adaptation. [ABSTRACT FROM AUTHOR]

Sex chromosomes play an outsized role in adaptation and speciation, and thus deserve particular attention in evolutionary genomics. In particular, fusions between sex chromosomes and autosomes can produce neo‐sex chromosomes, which offer important insights into the evolutionary dynamics of sex chromosomes. Here, we investigate the evolutionary origin of the previously reported Danaus neo‐sex chromosome within the tribe Danaini. We assembled and annotated genomes of Tirumala septentrionis (subtribe Danaina), Ideopsis similis (Amaurina), Idea leuconoe (Euploeina) and Lycorea halia (Itunina) and identified their Z‐linked scaffolds. We found that the Danaus neo‐sex chromosome resulting from the fusion between a Z chromosome and an autosome corresponding to the Melitaea cinxia chromosome (McChr) 21 arose in a common ancestor of Danaina, Amaurina and Euploina. We also identified two additional fusions as the W chromosome further fused with the synteny block McChr31 in I. similis and independent fusion occurred between ancestral Z chromosome and McChr12 in L. halia. We further tested a possible role of sexually antagonistic selection in sex chromosome turnover by analysing the genomic distribution of sex‐biased genes in I. leuconoe and L. halia. The autosomes corresponding to McChr21 and McChr31 involved in the fusions are significantly enriched in female‐ and male‐biased genes, respectively, which could have hypothetically facilitated fixation of the neo‐sex chromosomes. This suggests a role of sexual antagonism in sex chromosome turnover in Lepidoptera. The neo‐Z chromosomes of both I. leuconoe and L. halia appear fully compensated in somatic tissues, but the extent of dosage compensation for the ancestral Z varies across tissues and species. [ABSTRACT FROM AUTHOR]

Repetitive elements can cause large‐scale chromosomal rearrangements, for example through ectopic recombination, potentially promoting reproductive isolation and speciation. Species with holocentric chromosomes, that lack a localized centromere, might be more likely to retain chromosomal rearrangements that lead to karyotype changes such as fusions and fissions. This is because chromosome segregation during cell division should be less affected than in organisms with a localized centromere. The relationships between repetitive elements and chromosomal rearrangements and how they may translate to patterns of speciation in holocentric organisms are though poorly understood. Here, we use a reference‐free approach based on low‐coverage short‐read sequencing data to characterize the repeat landscape of two independently evolved holocentric groups: Erebia butterflies and Carex sedges. We consider both micro‐ and macro‐evolutionary scales to investigate the repeat landscape differentiation between Erebia populations and the association between repeats and karyotype changes in a phylogenetic framework for both Erebia and Carex. At a micro‐evolutionary scale, we found population differentiation in repeat landscape that increases with overall intraspecific genetic differentiation among four Erebia species. At a macro‐evolutionary scale, we found indications for an association between repetitive elements and karyotype changes along both Erebia and Carex phylogenies. Altogether, our results suggest that repetitive elements are associated with the level of population differentiation and chromosomal rearrangements in holocentric clades and therefore likely play a role in adaptation and potentially species diversification. [ABSTRACT FROM AUTHOR]

Caterpillars have a significant impact on human economy, because their plant‐attacking and silk‐producing habits. The larval mouthparts play a crucial role in feeding and spinning and exhibit an extremely morphological diversity, which is closely related to their taxonomic status, feeding habits, and even the developmental stages. However, the larval mouthparts have not been fully elucidated in the megadiverse Sphingidae. In this study, the larval mouthparts of Ampelophaga rubiginosa Bremer & Grey, 1853, Laothoe amurensis (Staudinger, 1892), Smeritus planus Walker, 1856, Dolbina tancrei Staudinger,1887, Phyllosphingia dissimilis (Bremer, 1861), and Marumba sperchius (Ménétriés, 1857) were morphologically observed and compared using scanning electron microscopy. The mouthparts of six species are morphologically diverse on the labral notches, mandibles, spinneret and labial palps arrangement of the mouthparts. The morphological diversity of larval mouthparts is briefly discussed, considering their taxonomical and functional aspects. [ABSTRACT FROM AUTHOR]

Thaumetopoea is a genus of Lepidoptera referred to as the processionary moths species, that comprises famous defoliators of forest trees. They are also a threat to human and animal health due to the urticating setae carried by their larvae. Their phylogenetic relationships were studied so far using morphological data, mitochondrial DNA and only a few nuclear markers. Results remained controversial so far, notably for the winter Conifer‐feeding species complex encompassing T. pityocampa and T. wilkinsoni. In particular, since the first identification of divergent mitochondrial clades, several new species were described and incongruent phylogenies were proposed in this group. We here explored the potential of nuclear RAD‐seq data to resolve these inconsistencies and compare the resultant phylogeny with the information provided by the mitochondrial COI gene. It allows to propose a robust phylogeny and decipher cases of mitochondrial introgressions and nuclear‐mitochondrial discordance, which raises doubts about the validity of some recently described species. Hence, we recommend caution before describing new taxa in this group from mitochondrial data alone. Species delineation between geographically bounded and genetically differentiated lineages cannot be addressed pertinently without dedicated sampling and associated population genomic and ecological studies. [ABSTRACT FROM AUTHOR]

Aim Location Methods Results Main Conclusions Rapid loss in global insect diversity has generated substantial public worry due to their critical ecological roles. However, there is controversy about the effectiveness of the global‐scale hotspots in guiding the conservation of diversity at the regional scale. Even worse, little is known about the knowledge of insect distributional dynamics in many understudied regions, such as East and Southeast Asia. Here, to guide for setting regional‐scale conservation priorities for insect diversity, we explore hawkmoths (Lepidoptera: Sphingidae) for their distributional dynamics and identify regional hotspots requiring protection.South China (including Guangdong, Guangxi, Hainan, Hong Kong and Macau) and northern Vietnam (17°~26.5° N, 102°~117.5° E).Species distribution models were generated for 194 hawkmoth species based on 3597 occurrence records to predict their distributions. We calculated the spatial patterns of taxonomic and phylogenetic diversity and identified regional hotspots. Furthermore, the potential assembly mechanisms underlying insect diversity were explored by analysing the rates of speciation, extinction and dispersal between phyloregions.(a) The coastal regions of South China and northern Vietnam represent a regional hotspot of hawkmoths in East and Southeast Asia, with significantly higher α‐diversity than that in inland regions. (b) Dispersal played a more important role than local speciation and extinction in the formation of regional hawkmoth hotspots.In this study, the ‘Out‐of‐the‐tropics model’ can explain the formation of the hawkmoth regional hotspots and the enhanced version of the ‘Pure dispersal model’ can explain the formation of the hotspots in Hainan Island. Compared with the local speciation and extinction, dispersal is the main driving factor that promoted the formation of the regional biodiversity hotspot of hawkmoths in South China. The case of Hainan Island suggests that protection within hotspots needs to account for specific regional macro‐evolutionary dynamics rather than indiscriminate coverage of identified hotspots. [ABSTRACT FROM AUTHOR]

In this study, a total of 900 specimens of univoltine polyhybrid silkworm breed were reared across early, mid, and late breeding seasons. The objective of the presented work was to assess reported cases of rearing silkworm on alternative host plants and evaluate the feasibility of partially replacing the optimal food source, Morus alba L., with the year-round available Taraxacum officinale (L.) Weber ex F.H.Wigg., while assessing larval and pupal duration, L5 larval weight, cocoon weight, as well as larval mortality and larval–pupal intermediates (unsuccessful pupae). While the substitution showed a statistically significant effect only for the larval stage duration, different temperature ranges affected all investigated traits. The optimal values were achieved in groups bred during the mid-season (19–24.5 °C), where differences in success between the control and the treatment were minimal. Further breeding will provide clearer insights into the limitations of this food replacement strategy within the system, depending on its research purpose. [ABSTRACT FROM AUTHOR]

New province records and interesting observations of Lepidoptera in 2023 are mentioned. Some older data are also listed. The whole list is arranged in alphabetical order. Systematics and nomenclature follow the Catalogue of the Lepidoptera of Belgium (De Prins & Steeman 2024). Several new species for the Belgian fauna are mentioned: Musotima nitidalis (Walker, 1866), Opogona omoscopa (Meyrick, 1893), Parapoynx polydectalis (Walker, 1859), and Ypsolopha asperella (Linnaeus, 1761). Three species were removed from the Belgian list: Aporophyla lutulenta (Denis & Schiffermüller, 1775), Eupithecia distinctaria Herrich-Schäffer, 1848, and Lamoria anella (Denis & Schiffermüller, 1775). [ABSTRACT FROM AUTHOR]

In the summer of 2023 mines and larvae of Perittia herrichiella (Herrich-Schäffer, [1855]) (Lepidoptera: Elachistidae) were found on the plant Lonicera xylosteum L. (Caprifoliaceae) in two locations in the province of Namur and one in the province of Luxembourg. This leaf miner occurs in many parts of Europe but has not yet been observed in the Benelux. In this article, general info about this species is provided, as well as some new information about bionomics. Finally, the Belgian observations are described and tips are given to distinguish P. herrichiella from other leaf miners living on the same host plant. [ABSTRACT FROM AUTHOR]

Transcriptomic data have been used to study sex chromosome dosage compensation (SCDC) in approximately 10 Lepidoptera ZW species, yielding a consensus compensation pattern of Z ≈ZZ

Studies of oriental fruit moth (OFM), Grapholita molesta (Busck), and codling moth (CM), Cydia pomonella (L.) (Lepidoptera: Tortricidae), both important pests of pome fruit, evaluated the addition of low‐intensity light‐emitting diode (LED) to delta traps baited with 3 commercial monitoring lures. Studies were conducted in 9 orchards treated with and without sex pheromone mating disruption for one or both species. OFM was monitored with a two‐part pheromone/kairomone lure (OFM Combo Dual), while CM was monitored with either a two‐part kairomone lure (CM Dual 4 K) or a sex pheromone lure (CM PH). Both pests were monitored with or without the addition of three types of a low power LED light with peak intensity at 395 (UV‐A), 458 (blue), and 516 (green) nm. The UV‐A LED was found to be the most effective among the three lights for OFM. Unexpectedly, traps with the OFM Combo Dual lure plus UV‐A LED caught similar numbers of CM as traps baited with the CM Dual 4 K and CM PH lures alone. They also caught other pest species, such as oblique banded leafroller (OBLR), Choristoneura rosaceana (Harris), and peach twig borer (PTB), Anarsia lineatella (Zeller). Interestingly, in different trials the OFM Combo Dual combined with UV‐A LED light caught significantly more OFM and/or CM females compared to the OFM Combo Dual lure without light, opening the perspective for a female‐oriented monitoring and for a "female removal" management approach of these pests. The development of inexpensive, dual‐modality traps adding a light stimulus to a pheromone/kairomone lure may reduce monitoring costs in orchards with multiple moth pests, improving the trapping efficiency. [ABSTRACT FROM AUTHOR]

We describe a new species of the genus Choranthus Scudder from northeastern Cuba based on morphological and molecular evidence. Choranthus serranorum sp. n. is the closest relative of C. richmondi from the Bahamas. We discuss the implications of its discovery for the evolution of the genus on the islands. Given the apparent restricted distribution of C. serranorum sp. n., we recommend a more comprehensive study of its biology. [ABSTRACT FROM AUTHOR]

In his 2009 review of New World Atteva Walker, Becker lists five species of Attevinae (= Attevidae), from Jamaica: Atteva pustulella (Fabricius), A. aurea (Fitch), A. siderea (Walsingham), A. sidereoides Becker, and A. fulviguttata (Zeller). There has been no recent collection of A. pustulella and A. siderea and their presence on the island needs reconfirming. Atteva fulvigutta has also not been found, but a similar species which is present is now recognized as A. glaucopidella Guenée, 1879, status revalidated, this name formerly being treated as synonymous with A. fulvigutta (Becker, 2009). [ABSTRACT FROM AUTHOR]

A new riodinid species in the Stalachtis calliope (Linnaeus) group (Nymphidiini: Stalachtina), S. radfordi n. sp., is described from elevations between 1100 and 2000 m in the Cordillera del Cóndor and its immediate environs in southeastern Ecuador. [ABSTRACT FROM AUTHOR]

Animal genitalia, especially those of insects, are very precise taxonomic features as they are strongly conserved within species but typically diverge significantly after speciation. In many cases, the shape of the genitalia is the only accurate way to distinguish between different species. A study was carried out to examine the butterflies in the Shimla province from a faunistic, ecological, and zoogeographic perspective. Seven species of the Swallowtail butterfly genus Papilio; P. machaon, P. protenor, P. polyctor, P. demoleus, P. paris, P. clytia, P. polyeuctes belonging to Papilionidae family were recorded in the study and have been described based on external appearance, their remarkable wing patterns and the genital organ morphology. Meanwhile; major taxonomic differences which help distinguish them from each other were photographed and the related information is given accordingly. [ABSTRACT FROM AUTHOR]

Simple Summary: Lepidoptera species have higher growth rates than Blattodea species. The different growth rates lead to different strategies to allocate energy to biosynthesis and somatic maintenance under free-feeding and low-food-availability conditions. Moreover, Lepidoptera and Blattodea spend sharply different amounts of energy on synthesizing one unit of bio-tissue, which, in turn, leads to different cellular qualities and abilities to resist stress, and may have effect on their adult lifespan. Based on this evidence, we postulate that the capability of maintaining homeostasis not only depends on the amount of energy allocated to maintenance, but also depends on the quality of the tissue, and that the tissue quality is at least partially due to the energetic investments in biosynthesis. In short, materials that are cheap to synthesize deteriorate faster, and allocating more energy to biosynthesis enhances somatic maintenance. Different life histories result in different strategies to allocate energy in biosynthesis, including growth and reproduction, and somatic maintenance. One of the most notable life history differences between Lepidoptera and Blattodea species is that the former grow much faster than the latter, and during metamorphosis, a large amount of tissue in Lepidoptera species disintegrates. In this review, using Lepidoptera caterpillars and cockroach nymphs as examples, we show that, due to these differences in growth processes, cockroach nymphs spend 20 times more energy on synthesizing one unit of biomass (indirect cost of growth) than butterfly caterpillars. Because of the low indirect cost of growth in caterpillars, the fraction of metabolic energy allocated to growth is six times lower, and that for maintenance is seven times higher in caterpillars, compared to cockroach nymphs, despite caterpillar's higher growth rates. Moreover, due to the higher biosynthetic energy cost in cockroach nymphs, they have better cellular qualities, including higher proteasomal activity for protein quality control and higher resistance to oxidative stress. We also show that under food restriction conditions, the fraction of assimilated energy allocated to growth was reduced by 120% in cockroach nymphs, as they lost body weight under food restriction, while this reduction was only 14% in hornworms, and the body mass increased at a lower rate. Finaly, we discuss future research, especially the difference in adult lifespans associated with the energetic differences. [ABSTRACT FROM AUTHOR]

Simple Summary: An updated classification system for the Aporia agathon group is proposed after the re-examination of a long series of specimens with mitogenomic data. Our results showed that A. japfuensis, A. bifurcata, A. moltrechti, A. kuangtungensis, and A. omotoi should be recognised as full species, while lemoulti, gigantea, and fanjinensis should be recognized as subspecies of A. largeteaui. In addition, two subspecies, A. kuangtungensis yufeii and A. kuangtungensis josephi, are described herein. Pierid species of the Aporia agathon group are among the largest Sino-Himalayan members of genus Aporia, with four conventionally recognised species, namely A. agathon, A. largeteaui, A. gigantea, and A. lemoulti. Recent publications indicated that some of these species may contain more than one species despite their similar morphological characters. The present research analysed this group of butterflies using mitogenomic data, and proved that A. japfuensis stat. nov., A. bifurcata stat. nov., A. moltrechti reinst. stat., A. kuangtungensis stat. nov. and A. omotoi stat. nov. should be recognised as distinct species, while lemoultistat. rev., gigantea stat. nov. and fanjinensis stat. rev. should be subspecies of A. largeteaui. Two new subspecies, namely A. kuangtungensis yufeii ssp. nov. and A. kuangtungensis josephi ssp. nov. were described. Illustrations of specimens and male and female genitalia of each taxon were provided in this article with an updated classification system. Variable melanism and yellow tinge are two major factors causing historical taxonomic confusion; thus, such characters should be less crucial for this species group. Future research is still necessary to elucidate the evolutionary history of these species along with other Aporia taxa, as well as the mechanism of variable melanism and yellow coloration. [ABSTRACT FROM AUTHOR]

Simple Summary: Moths of the genus Urodeta Stainton were studied, which are very small in comparison to many species of the subfamily Elachistinae Bruand (family Elachistidae Bruand). Urodeta is currently the smallest genus and, until 2009, was known only from the Mediterranean region. Over the past 17 years, its geographical range expanded considerably, reaching Australia, sub-Saharan Africa, and Asia. Here, we describe Urodeta inerme sp. nov. from the tropical dry forests of Honduras, representing the first record of Urodeta in Central America. This discovery not only enhances the Elachistinae diversity in the Neotropics but also largely extends the distribution range of Urodeta. The genus Urodeta Stainton (Lepidoptera: Elachistidae: Elachistinae) is recorded for the first time from the Neotropical region, with the description of a new species, Urodeta inerme sp. nov., from Honduras. The new species is diagnosed and illustrated with photographs of the adults, genitalia of both sexes, and habitat. Identification keys to the world species of the genus Urodeta, based on male and female genitalia, are provided. [ABSTRACT FROM AUTHOR]

Simple Summary: In this study, we investigated the fine structure of the proboscis and its associated sensilla in adult Colias erate (Esper, 1805). The results show that the elongated proboscis is structurally similar in both sexes, with external features supporting its division into three distinct regions (zones 1–3). Three types of sensilla, comprising five subtypes, were identified in the proboscis. The uniformly short, aporous sensilla chaetica likely represents an adaptation to reduce friction when the proboscis extends into deep and narrow floral corollas. A single sensillum styloconicum is located at the apex of each galea, consistent with observations in other Colias species. This study provides a morphological basis for understanding the feeding mechanisms of Pieridae. Morphological studies of the proboscis can provide valuable insights into the evolutionary adaptations of Lepidoptera. However, such research is relatively limited for Pieridae, a family that is significant both ecologically and economically. In this study, scanning electron microscopy (SEM) was employed to investigate the proboscis and associated sensilla of adult C. erate, with an emphasis on ultrastructural details and potential sex-specific differences. The proboscis in both sexes exhibits a similar structure, consisting of two elongated maxillary galeae connected by dorsal and ventral legulae. It is divided into three distinct zones based on morphological changes in the dorsal legulae. The outer surface of the proboscis is characterized by spike-like microbumps on transverse ridges, while the inner surface (food canal) is smooth throughout all three zones, with regularly spaced transverse grooves. Three types of sensilla comprising five subtypes were identified: sensilla chaetica (sc), sensilla basiconica (sb1, sb2, and sb3), and sensilla styloconica (ss). The functional implications of these morphological features are also discussed briefly. [ABSTRACT FROM AUTHOR]

In the present study, we investigated the antennal morphology and the distribution and typology of sensilla in antennae of male and female Caligo illioneus illioneus Cramer (Lepidoptera: Nymphalidae), examined by scanning electron microscopy—SEM. The insect was identified by morphological and molecular means, and the COI gene of this subspecies was sequenced and deposited in GenBank. The SEM results showed that antennae of both sexes do not present dimorphism, as they cannot be distinguished from each other in terms of morphology. In addition, the ventral region of the flagellum has longitudinal carinae. In both sexes, seven types of sensilla were identified along the scape, pedicel and flagellum: Böhm's bristles and sensilla auricillica, basiconica, chaetica, coeloconica, squamiformia, and trichodea. Subtypes I and II were characterized for Böhm's bristles and sensilla basiconica and chaetica according to the length, because morphometric result was statistically different among individuals of the same sex. In addition, the flagellum contains the vast majority of sensilla and their subtypes, except for Böhm's bristles, present only in the basal region. This study provides valuable information about the antennal morphology and sensilla typology in C. i. illioneus, contributing with morphological evidence on the sensory system of butterflies, mainly in the genus Caligo, which is helpful to assist behavioral and electrophysiological studies. [ABSTRACT FROM AUTHOR]

Tineola bisselliella , the webbing clothes moth, is an economically important, globally distributed synanthropic pest species and member of the basal moth lineage Tineidae. These moths are facultatively keratinophagous, and their larvae can cause extensive damage, particularly to clothing, textiles, and museum specimens. Despite the economic and phylogenetic importance of T. bisselliella , there is a lack of quality genomic resources for this, or for other species within the Tineidae family. The T. bisselliella genome assembly presented here consists of 30 pseudochromosomes (29 autosomes and 1 Z chromosome) produced using synteny alignment of a preliminary contig-level assembly (256 contigs) to a closely related species, Tinea pellionella. The resulting final pseudochromosome-level assembly is 243.630 Mb and has an N50 length of 8.708 Mb. The assembly is highly contiguous and has similar or improved quality compared to other available Tineidae genomes, with 93.1% (91.8% single copy and 1.3% duplicated) of lepidopteran orthologs complete and present. Annotation of the pseudochromosome-level genome assembly with the transcriptome we produced ultimately yielded 11,259 annotated genes. Synteny alignments between the T. bisselliella genome assembly and other Tineidae genomes revealed evidence for numerous small rearrangements with high synteny conservation. In contrast, a synteny alignment performed between T. bisselliella and Melitaea cinxia , which is thought to have retained the ancestral karyotype (n = 31), revealed a fusion of the ancestral autosome 30 and Z chromosome that led to a reduction in T. bisselliella karyotype size. The reference quality annotated genome for T. bisselliella presented here will advance our understanding of the evolution of the lepidopteran karyotype by providing a chromosome-level genome for this basal moth lineage and provide future insights into the mechanisms underlying keratin digestion in T. bisselliella. [ABSTRACT FROM AUTHOR]

Urban wastelands are among the most neglected urban habitats. Our study demonstrated that those spatially restricted patches of vegetation are an important refuge for various species of butterflies. We have assessed the diversity, distribution patterns, and seasonal changes of butterfly communities based on two‐year (2019–2020), quantitative studies at 5 urban wastelands in a large post‐industrial city in Central Poland. Forty‐six species of butterflies were recorded in the city. We have noticed homogeneity of fauna, although all investigated sites were characterised by high diversity and co‐occurrence of species associated with different habitats (e.g., grasslands, woodlands). Most of the species were common in Central Poland, although we have also recorded the presence of more specialised butterflies. Bray–Curtis similarity analysis reflected mostly seasonal changes in species composition. Seasonal patterns were very similar at all investigated sites and during both seasons, pointing to relative stability. Urban wastelands hosted from 34 to 41 species. This pattern results from the high diversity of microhabitats and the co‐occurrence of various plant species at single sites, which is very important for plant‐dependent organisms like butterflies. [ABSTRACT FROM AUTHOR]

Insect declines are raising alarms regarding cascading effects on ecosystems, especially as many insectivorous bird populations are also declining. Here, we leveraged long‐term monitoring datasets across Finland to investigate trophic dynamics between functional groups of moths and birds in forested habitats. We reveal a positive association between the biomass of adult‐ or egg‐overwintering moths and the biomasses of resident and long‐distance migrant birds reliant on caterpillars as breeding‐season food in the north‐boreal zone. Contrary to expectations, similar signs of moth bottom‐up effects on insectivorous birds were not observed in other Finnish regions or for moths overwintering in other life stages. In fact, some negative associations between moths and birds were even detected, possibly attributable to opposite abundance trends. While supporting the existence of bottom‐up effects in the north‐boreal zone, our study emphasizes the need for further investigation to elucidate moth‐mediated trophic dynamics in areas characterized by the insect decline. [ABSTRACT FROM AUTHOR]