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SEM analysis of sensilla on the mouthparts and antennae of Asian larch bark beetle Ips subelongatus
- Source :
- Micron. 140:102976
- Publication Year :
- 2021
- Publisher :
- Elsevier BV, 2021.
-
Abstract
- The Asian larch bark beetle, Ips subelongatus, is a severe pest of larches in Northeastern China. The gustatory and olfactory systems of I. subelongatus play important roles in host location, mating, and feeding. In this study, we examined the types, distributions, and abundances of various sensilla associated with the mouthparts and antennae of I. subelongatus using scanning electron microscopy (SEM). On the mouthparts, five types of sensilla are present: sensilla trichodea (S.t.1-3), sensilla chaetica (S.c.1-3), sensilla basiconica (S.b.1-2), sensilla twig basiconica (S.tb.1-3), and sensilla placodea (S.p). S.t.3 are the most abundant sensilla subtype on the mouthparts in both sexes, while S.b.1 are the least abundant. Most sensilla on the mouthparts are located on the maxillae and labium, and the apex of each maxillary and labial palp carry the same sensilla subtypes (S.b.2 and S.tb.1-3). However, the total number of sensilla on the apex of each maxillary palp is higher than that on the labial palp. On the antennae, five types of sensilla are present: sensilla trichodea (S.t.1-3), sensilla chaetica (S.c.1-2), sensilla basiconica (S.b.1-3), Böhm bristles (B.b), and sensilla coeloconica (S.co). Antennal sensilla are mostly situated on the anterior surface of the antennal club, particularly on the two dense sensory bands. S.b.1 are the most abundant sensilla subtype on the antennae in both sexes, while S.t.1 are the least abundant. No sexual dimorphism in sensilla type or distribution on the mouthparts or antennae is observed between the sexes of I. subelongatus. However, S.t.3 (on mouthparts) and S.c.1 (on antennae) were significantly more abundant in males than in females, while more S.t.1 (on mouthparts) were observed in females than in males. Finally, the putative functions of each kind of sensilla with respect to their fine structures, distributions, and abundances on the mouthparts and antennae are discussed.
- Subjects :
- Arthropod Antennae
Male
China
General Physics and Astronomy
Larix
02 engineering and technology
Anterior surface
Biology
Bristle
01 natural sciences
Structural Biology
0103 physical sciences
Animals
General Materials Science
Sensilla
010302 applied physics
Mouth
Sex Characteristics
Sem analysis
Ips subelongatus
Cell Biology
Anatomy
021001 nanoscience & nanotechnology
Arthropod mouthparts
Coleoptera
Sexual dimorphism
Maxilla
Microscopy, Electron, Scanning
Female
Larch bark beetle
0210 nano-technology
Subjects
Details
- ISSN :
- 09684328
- Volume :
- 140
- Database :
- OpenAIRE
- Journal :
- Micron
- Accession number :
- edsair.doi.dedup.....82aa659a2e9af08bc103bcf820e60fbb
- Full Text :
- https://doi.org/10.1016/j.micron.2020.102976