Iheringichthys syi (Siluriformes: Pimelodidae), a new pimelodid species from upper Paraná basin, Brazil

We describe a new species of pimelodid catfish of the genus Iheringichthys from the upper Paraná basin, Brazil. Iheringichthys syi n. sp. is distinguished by the comparatively fine serration along the anterior margin of the pectoral-fin spine, an adpressed dorsal-fin remote from the adipose-fin origin, a large eye (23.2-31.2% of head length), narrow interorbital (16.2-23.0% of head length), long snout (42.0-51.0% of head length), long postorbital length (30.6-34.0% of head length), low adipose fin (4.8-7.8% of standard length), eye diameter 97.0-140.0% of interorbital length, and body with numerous, small dots irregularly scattered on flanks, especially marked on anterior half of flank.

We thank the staff of Proyecto Pesquero Regional (UNAM) for donation of material, Carl Ferraris Jr. (CAS) for hand-carrying the holotype of I. megalops from California to La Plata, David Catania (CAS) for permission to use the CAS primary type imagebase, Jorgen Nielsen (ZMUC) for loan of type material and provision of old literature, John Lundberg and Mark Sabaj Pérez for their friendly help in The Academy of Natural Sciences of Philadelphia, Richard Vari (USNM) for permission to examine material under his care, Stefan Körber for translation of German literature, Soledad Gouiric Cavalli and Daniel Cabrera (MLP) for help with photographs under stereomicroscope, Leandro M. Souza (MZUSP) for photographs of the holotype, three anonymous reviewers improved the manuscript, the Agencia Nacional de Promoción Científica y Tecnológica (PICT 913), the All Catfish Species Inventory Project, and the Consejo Nacional de Investigaciones Científicas y Técnicas (PIP 5365) for financial support.