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Reassessing the systematics of Leptodeira (Serpentes, Dipsadidae) with emphasis in the South American species

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Costa, Joao C. L. ; Graboski, Roberta ; Grazziotin, Felipe G. ; Zaher, Hussam ; Rodrigues, Miguel T. ; Prudente, Ana Lucia da C.
Número total de Autores: 6
Tipo de documento: Artigo Científico
Fonte: ZOOLOGICA SCRIPTA; v. 51, n. 4, p. 19-pg., 2022-04-28.

Within the diverse subfamily Dipsadinae, Imantodini represents one of the few groups distributed in North, Central and South America. The tribe comprises the genera Leptodeira and Imantodes, from which Leptodeira is the most diverse, including 15 species and 11 subspecies, distributed from southern USA to central Argentina. Taxonomy and affinities among these taxa are poorly resolved, and the phylogenetic relationships among the South American diversity were never properly assessed before. Here, we investigate the phylogenetic relationships and the taxonomic status of Leptodeira spp. based on a comprehensive multilocus dataset with emphasis in the South American radiation. Besides assessing the phylogenetic relationship and species cohesion, we also evaluate the morphological variation among the South American diversity of Leptodeira. Our results support the monophyly of Imatodini and Leptodeira, while indicating that several individuals classified as Leptodeira annulata and L. septentrionalis do not cluster together within their respective species. Moreover, specimens identified as belonging to the subspecies L. a. annulata, L. a. cussiliris, L. s. ornata and L. s. polysticta do not group together suggesting the current classification includes non-natural groups. The analysis of morphological evidence also supports the phylogenetics results, indicating that several clades can be recognized as evolutionary units presenting distinct phenotypes. To equate the taxonomy to our results, we propose a new taxonomic arrangement for Leptodeira in which we are: (1) redefining the composition of L. annulata and L. septentrionalis; (2) elevating five subspecies to species level; (3) revalidating one species; (4) recognizing four species complexes; and (5) indicating the presence of hidden diversity (probably four undescribed species). Finally, we describe a new species (Leptodeira tarairiu sp. nov.) from the open formations of South America (Cerrado and Caatinga), and we provide detailed redescriptions for all South American species of Leptodeira. (AU)

Processo FAPESP: 12/08661-3 - Genômica Comparada de Serpentes Insulares
Beneficiário:Felipe Gobbi Grazziotin
Modalidade de apoio: Bolsas no Brasil - Pós-Doutorado
Processo FAPESP: 11/50206-9 - Origem e evolução das serpentes e a sua diversificação na região neotropical: uma abordagem multidisciplinar
Beneficiário:Hussam El Dine Zaher
Modalidade de apoio: Auxílio à Pesquisa - Programa BIOTA - Temático
Processo FAPESP: 03/10335-8 - Sistemática e evolução da herpetofauna neotropical
Beneficiário:Miguel Trefaut Urbano Rodrigues
Modalidade de apoio: Auxílio à Pesquisa - Temático
Processo FAPESP: 16/50127-5 - Dimensions US-BIOTA São Paulo: scales of biodiversity: integrated studies of snake venom evolution and function across multiple levels of diversity
Beneficiário:Inácio de Loiola Meirelles Junqueira de Azevedo
Modalidade de apoio: Auxílio à Pesquisa - Programa BIOTA - Temático
Processo FAPESP: 11/50146-6 - Filogeografia comparada, filogenia, modelagem paleoclimática e taxonomia de répteis e anfíbios neotropicais
Beneficiário:Miguel Trefaut Urbano Rodrigues
Modalidade de apoio: Auxílio à Pesquisa - Programa BIOTA - Temático