The cascudos of the genus Hypostomus Lacépède (Ostariophysi: Loricariidae) from the rio Iguaçu basin

We reviewed several large collections of the genus Hypostomus from the rio Iguaçu basin summing up to 793 specimens mainly from the Laboratório de Ictiologia do Departamento de Ecologia e Biologia Evolutiva from Universidade Federal de São Carlos, from fish collection of Núcleo de Pesquisas em Limnologia, Ictiologia e Aquicultura da Universidade Estadual de Maringá, and from the Museu de História Natural do Capão da Imbuia. Hypostomus albopunctatus, H. commersoni, H. derbyi, and H. myersi are redescribed and Hypostomus nigropunctatus is described as a new species. A practical key for identification of Hypostomus species from the rio Iguaçu is also provided.The authors are indebted to Barbara Brown (AMNH), Mary A. Rogers of Field Museum of Natural History (FMNH), Claude Weber and Sonia F. Muller (MHNG), Mark Sabaj-Perez (ANSP), Osvaldo T. Oyakawa (MZUSP), Patrick Campbell (BMNH), Patrice Pruvost (MNHN), Vinícius Abilhoa (MHNCI) and Zilda M. S. Lucena (MCP) for loan of comparative material and hosting museum visits; Renata Ota (UEM- NUP) and Vinícius Abilhoa (MNHCI) for helping with collection data information. Alexandre K. de Oliveira helped with cataloguing specimens at laboratory. Copel and Nupélia provided logistical support in some fieldwork. This study was supported by funds and grants from the Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq) for JCG, HAB, and CHZ. CHZ was supported by grants from the US National Foundation (DEB-0315963) through the project entitled Planetary Biodiversity Inventory: All Catfish Species (Siluriformes), Phase I of an Inventory of the Otophysi to visit museums, and JCG from the Robert O. Bass Visitor Fund of FMNH to visit the Field Museum of Natural History.

The cascudos of the genus Hypostomus Lacépède (Ostariophysi: Loricariidae) from the rio Iguaçu basin

We reviewed several large collections of the genus Hypostomus from the rio Iguaçu basin summing up to 793 specimens mainly from the Laboratório de Ictiologia do Departamento de Ecologia e Biologia Evolutiva from Universidade Federal de São Carlos, from fish collection of Núcleo de Pesquisas em Limnologia, Ictiologia e Aquicultura da Universidade Estadual de Maringá, and from the Museu de História Natural do Capão da Imbuia. Hypostomus albopunctatus, H. commersoni, H. derbyi, and H. myersi are redescribed and Hypostomus nigropunctatus is described as a new species. A practical key for identification of Hypostomus species from the rio Iguaçu is also provided

Redescription of Hypostomus johnii, a senior synonym of Hypostomus eptingi (Siluriformes: Loricariidae), Northeastern Brazil

ABSTRACT Hypostomus johnii (Steindachner) was described from the rio Parnaíba basin in the state of Piauí and the rio São Francisco basin in the state of Bahia. Despite the good quality of the original description of H. johnii, it does not currently allow its distinction from congeners. Thus, H. johnii is redescribed based on the analysis of the types and several recently collected specimens. Recent collecting efforts of the rios Parnaíba and São Francisco basins resulted in specimens only being found in the rio Parnaíba basin. This raises doubts about whether H. johnii occurs in the rio São Francisco basin. The species is distinguished from its congeners by having a high number of teeth on the premaxilla and dentary (between 60-115); small to moderate-sized dark spots with a light background; absence of keels on flanks; and abdominal plates more evident on laterals. A lectotype of H. johnii is designated herein and H. eptingi is considered a junior synonym of H. johnii