Morphological variation of Hypostomus affinis (Teleostei: Loricariidae) from eastern Brazilian drainages

Autor(es)

Perez, Camila F. ^[1] ; Oliveira, Alexandre K. ^[2] ; Garavello, Julio C. ^[1]

Afiliação do(s) autor(es)

^[1] Univ Fed Sao Carlos, Dept Ecol & Biol Evolut, Lab Ictiol Sistemat, Rodovia Washington Luis, Km 235, Caixa Postal 676, BR-13565905 Sao Carlos, SP - Brazil

^[2] Univ Fed Sao Carlos, Dept Ciencias Ambientais, Rodovia Washington Luis, Km 235, Caixa Postal 676, BR-13565905 Sao Carlos, SP - Brazil

• Tipo de documento: Artigo Científico
• Fonte: Ichthyological Exploration of Freshwaters; v. 30, n. 4, p. 331-343, JUL 2021.
• Citações Web of Science: 0

Resumo

Morphological variations of Hypostomus affinis from the Paraiba do Sul, Doce and Mucuri rivers are described and discussed in the light of biogeographic scenarios for freshwater fish in eastern Brazil. Variations were observed in the lateral keels of the body and head, in the color pattern and in the number of premaxillary and dentary teeth. Keels are more conspicuous on specimens from the Paraiba do Sul River because dermal plates have rows of larger odontodes. The samples from Doce and Mucuri rivers have greater morphometric and chromatic similarities in relation to the samples from the Paraiba do Sul River. On the other hand, specimens from the Mucuri and Paraiba do Sul rivers have fewer teeth in both jaws than those from the Doce river. Despite such variations, no character alone is able to recognize and differentiate the specimens from each of these three drainages. Distribution and morphological variation of Hypostomus affinis are related to the geomorphological history of eastern Brazilian coastal drainages. (AU)

• Processo FAPESP: 18/04388-7 - Revisão das espécies nominais da ictiofauna de rios do estado de São Paulo através de análises morfológicas e moleculares de topotipos, incluindo a caracterização da diversidade ictiológica remanescente nas localidades-tipo e suas proximidades
• Beneficiário: Julio Cesar Garavello
• Modalidade de apoio: Auxílio à Pesquisa - Programa BIOTA - Regular