Molecular and morphological diversity in species of Kronichthys (Teleostei, Loricariidae) from Atlantic coastal rivers of Brazil

Autor(es)

Souza, Camila S. ^[1] ; Silva, Gabriel S. C. ^[2] ; Ochoa, Luz E. ^[3] ; Roxo, Fabio F. ^[2] ; Costa-Silva, Guilherme J. ^[4] ; Foresti, Fausto ^[1] ; Melo, Bruno F. ^[1] ; Oliveira, Claudio ^[1]

Afiliação do(s) autor(es)

^[1] Univ Estadual Paulista, Inst Biociencias, Dept Biol Estrutural & Func, R Prof Dr Antonio CW Zanin 250, BR-18618689 Botucatu, SP - Brazil

^[2] Univ Estadual Paulista, Inst Biociencias, Dept Bioestat Biol Vegetal Parasitol & Zool, Botucatu, SP - Brazil

^[3] Univ Sao Paulo, Museu Zool, Sao Paulo - Brazil

^[4] Univ Santo Amaro, Sao Paulo - Brazil

• Tipo de documento: Artigo Científico
• Fonte: Journal of Fish Biology; v. 98, n. 3 DEC 2020.
• Citações Web of Science: 0

Resumo

The Neotropical catfish genus Kronichthys contains three species distributed along coastal rivers of southern and southeastern Brazil. Although phylogenetic hypotheses are available, the molecular and morphological diversity and species boundaries within the genus remain unexplored. In this study, the authors generated mitochondrial data for 90 specimens combined with morphometric and meristic data to investigate species diversity, species boundaries and putative morphological signatures in Kronichthys. Phylogenetic and species delimitation results clearly show the presence of four genetic lineages, three within Kronichthys heylandi along the coast from Rio de Janeiro to southern Sao Paulo and a single lineage encompassing both the nominal species Kronichthys lacerta and Kronichthys subteres from the Ribeira de Iguape basin to Santa Catarina in southern Brazil. Nonetheless, morphological data show overlapped ranges in morphometrics and a definition of only two morphotypes, with clear phenotypic differences in the teeth number: K. heylandi differs from K. subteres + K. lacerta by the higher number of premaxillary teeth (30-52 vs. 19-28) and higher number of dentary teeth (28-54 vs. 17-28). Headwater captures and connections of paleodrainages because of sea-level fluctuations represent the two major biogeographic processes promoting species diversification and lineage dispersal of Kronichthys in the Atlantic coastal range of Brazil. (AU)

• Processo FAPESP: 18/23883-9 - Peixes elétricos do gênero Sternarchorhynchus, um caso de irradiação adaptativa em escala continental? Uma abordagem filogenômica e morfológica
• Beneficiário: Luz Eneida Ochoa Orrego
• Modalidade de apoio: Bolsas no Brasil - Pós-Doutorado
• Processo FAPESP: 17/06551-0 - Characinae (Actinopterygii: Characiformes: Characidae): identificação molecular e estudo das relações filogenéticas entre espécies
• Beneficiário: Camila da Silva de Souza
• Modalidade de apoio: Bolsas no Brasil - Doutorado
• 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: 16/11313-8 - Filogenia da Ordem Characiformes (Teleostei: Ostariophysi) utilizando elementos ultraconservados
• Beneficiário: Bruno Francelino de Melo
• Modalidade de apoio: Bolsas no Brasil - Pós-Doutorado