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Your search keyword '"Da Silva, Reinaldo José"' showing total 368 results
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368 results on '"Da Silva, Reinaldo José"'

10. Parasites (Monogenea) of tilapias Oreochromis niloticus and Coptodon rendalli (Cichlidae) in a river spring in Brazil

Author

Ebert Mariana Bertholdi, Narciso Rodrigo Bravin, Vieira Dias Diego Henrique Mirandola, Osaki-Pereira Melissa Miyuki, Jorge Maurício, de León Gerardo Pérez-Ponce, and da Silva Reinaldo José

Subjects
monogenea, cichlidogyrus, scutogyrus, neotropical region, lsu rdna, exotic fishes, Infectious and parasitic diseases, RC109-216
Abstract

In the present study, we examined 30 individuals of introduced African cichlids, Oreochromis niloticus and Coptodon rendalli, collected in a river spring of the Pardo River, Paranapanema River basin, southeastern Brazil. Based on morphological and molecular analyses of the partial LSU rDNA gene, we identified four species of monogeneans, Cichlidogyrus tilapiae, C. thurstonae, C. mbirizei, and Scutogyrus longicornis on the gills of O. niloticus, whereas individuals of C. rendalli were infested only with C. papernastrema. This is the first record of C. mbirizei and C. papernastrema in tilapias from Brazil. The ecological consequences of the introduction of exotic species of tilapia such as O. niloticus and C. rendalli along with their monogenean parasites in a wild environment represented by a river spring are discussed. Our new molecular data on Cichlidogyrus and Scutogyrus contribute to the investigation of the phylogenetic interrelationships of these widely distributed genera of monogeneans since their species composition is still unsettled.

Published
2024
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18. Morphological and Molecular Analysis Describing Two New Species of Myxobolus (Cnidaria, Myxosporea) in Mugil curema (Mugilidae) from Brazil †.

Author

Vieira, Diego Henrique Mirandola Dias, Osaki-Pereira, Melissa Miyuki, Abdallah, Vanessa Doro, Oliveira, Sarah Letícia Paiva, Duarte, Aline Gabriely Torres, da Silva, Reinaldo José, and de Azevedo, Rodney Kozlowiski

Subjects
RIBOSOMAL DNA, MOLECULAR phylogeny, GRAY mullets, CNIDARIA, LAGOONS, CLADISTIC analysis
Abstract

We present descriptions of two newly discovered species of Myxobolus (Myxobolidae) that infect Mugil curema: Myxobolus mundauensis n. sp. found in gills and Myxobolus patriciae n. sp. found in intestines. These descriptions are based on the morphology of myxospores, histological analysis, and sequencing of the small subunit ribosomal DNA (ssrDNA). The myxospores of both species differ in the width and length of their spore bodies, and their ssrDNA sequences showed a 10.6% difference. These findings support the identification of these parasites as distinct and previously unknown species. Phylogenetic analysis revealed a subclade consisting of species that parasitize Mugiliformes, with Myxobolus mundauensis n. sp. being closely related to Myxobolus maceioensis, and Myxobolus patriciae n. sp. being closely related to Myxobolus curemae. Our analysis aligns with previous research suggesting a strong correlation between host orders and phylogenetic patterns within the Myxobolidae family. [ABSTRACT FROM AUTHOR]

Published
2024
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46. Three new species of Creptotrema (Trematoda, Allocreadiidae) with an amended diagnosis of the genus and reassignment of Auriculostoma (Allocreadiidae), based on morphological and molecular evidence

Author

Franceschini Lidiane, Aguiar Aline, Zago Aline Cristina, de Oliveira Fadel Yamada Priscilla, Bertholdi Ebert Mariana, and da Silva Reinaldo José

Subjects
digeneans, teleosts, phylogeny, host-parasite relationships, neotropical region, Infectious and parasitic diseases, RC109-216
Abstract

Diversity of Creptotrema was investigated using morphological and molecular tools, including data for Creptotrema creptotrema (type-species). Three new species, parasites of Brazilian fishes, are described: Creptotrema conconae n. sp. (type-host, Imparfinis mirini Haseman), Creptotrema schubarti n. sp. (type-host, Characidium schubarti Travassos) and Creptotrema megacetabularis n. sp. (type-host, Auchenipterus osteomystax (Miranda Ribeiro)). The diagnosis of the genus was amended to include new features. The new species differ from each other mainly in terms of body shape, relative sucker size, and testes position. DNA sequences were obtained from Creptotrema spp. from Brazil, including 28S, ITS and COI. Genetic divergences among the new species and C. creptotrema varied from 2.1 to 5.2% (21–49 bp) for 28S, and 6.6 to 16.4% (21–45 bp) for COI. Phylogenetic analysis (28S) placed the newly generated DNA sequences of Creptotrema in a clade (Creptotrema clade sensu stricto) composed of C. creptotrema, the new species described herein, and all species previously described as Auriculostoma, revealing that Auriculostoma is best interpreted as a synonym of Creptotrema based on the principle of priority of zoological nomenclature. Creptotrema funduli, the single sequence of the genus previously available, was not grouped within the Creptotrema clade sensu stricto, suggesting the need for reevaluation of the taxonomic status of this species. Our results showed that Creptotrema represents a monophyletic genus of trematodes widely distributed across the Americas, which currently comprises 19 valid species of parasites of teleosts and anurans.

Published
2021
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