olecular diversity and historical phylogeography of the widespread genus Mastiglanis (Siluriformes: Heptapteridae) based on palaeogeographical events in South Americ

Autor(es)

Gales, Suellen M. ^[1] ; Ready, Jonathan Stuart ^[1] ; Sabaj, Mark H. ^[2] ; Bernt, Maxwell J. ^[3] ; Ferreira Silva, Derlan Jose ^[1] ; Oliveira, Claudio ^[4] ; Oliveira, Guilherme ^[5] ; Sales, Joao Braullio L. ^[1]

Afiliação do(s) autor(es)

^[1] Univ Fed Para, Ctr Estudos Avancados Biodiversidade CEABIO, Grp Invest Biol Integrada, Av Perimetral Ciencia 01, Lote 11, BR-66075750 Belem, Para - Brazil

^[2] Acad Nat Sci Philadelphia, 19th & Pkwy, Philadelphia, PA 19103 - USA

^[3] Amer Museum Nat Hist, Dept Ichthyol, New York, NY 10024 - USA

^[4] Univ Estadual Paulista, Inst Biociencias, Dept Biol Estrutural & Func, Dist Rubido Jr 250, BR-18618689 Botucatu, SP - Brazil

^[5] Inst Tecnol Vale, Rua Boa Ventura Silva 955, BR-66055090 Belem, Para - Brazil

• Tipo de documento: Artigo Científico
• Fonte: Biological Journal of the Linnean Society; v. 135, n. 2, p. 322-335, FEB 2022.
• Citações Web of Science: 0

Resumo

The catfish family Heptapteridae, endemic in the Neotropical region, is composed of small- to medium-sized species. The genus Mastiglanis was monotypic until very recently and is often misidentified as Imparfinis because of similarities in diagnostic characters, including the length of maxillary barbels and limited pigmentation. We provide the first molecular inference of diversity for samples identified as Mastiglanis. Partial 16S and COI sequences were produced for 84 samples identified morphologically as Mastiglanis from the Amazon, Orinoco and Essequibo river basins. Species delimitation and phylogenetic methods recovered the genus as monophyletic, but samples assigned to the species Mastiglanis asopos yielded 21 distinct operational taxonomic units, often in sympatry. The first cladogenesis event, at similar to 12 Mya, was associated with marine incursions and/or vicariance events between the northward-flowing systems in the west and the rivers that drain to the east. Subsequent diversification during the Miocene and Pliocene was inferred to have resulted from environmental changes associated with Andean orogeny, whereas recent diversification in the late Pliocene and Pleistocene was inferred to result from environmental changes during glacial cycles. Despite the many probable cryptic species found across the large geographical distribution of the genus, further sampling is expected to increase taxonomic richness in this genus. (AU)

• Processo FAPESP: 14/26508-3 - Filogenia da hiperdiversa ordem Characiformes (Teleostei: Ostariophysi) utilizando elementos ultraconservados
• Beneficiário: Claudio de Oliveira
• Modalidade de apoio: Auxílio à Pesquisa - Temático
• Processo FAPESP: 18/20610-1 - Estudo da biogeografia da costa do Brasil utilizando dados da genética de populações de bagres marinhos dos gêneros Cathorops e Genidens
• Beneficiário: Claudio de Oliveira
• Modalidade de apoio: Auxílio à Pesquisa - Regular
• Processo FAPESP: 16/09204-6 - Biodiversidade e Biogeografia em peixes marinho-estuarinos (Teleostei) do Brasil
• Beneficiário: Claudio de Oliveira
• Modalidade de apoio: Auxílio à Pesquisa - Regular