Revision of Tympanopleura Eigenmann (Siluriformes: Auchenipteridae) with description of two new species

摘要: The Neotropical catfish genus Tympanopleura, previously synonymized within Ageneiosus, is revalidated and included species are reviewed. Six recognized, two of which described as new. Tympanopleura distinguished from Ageneiosus by having an enlarged gas bladder not strongly encapsulated in bone; a prominent pseudotympanum consisting area on the side body devoid epaxial musculature where contacts internal coelomic wall; short, blunt head without greatly elongated jaws; smaller adult size. Species each other basis unique meristic, morphometric, pigmentation differences. melanopogon nigricollis junior synonyms atronasus. alta synonym brevis. A lectotype designated for T. madeirensis rondoni. atronasus, brevis, longipinna, rondoni relatively widespread middle upper Amazon River basin. cryptica few specimens collected portion basin Peru that Brazil. piperata distributed basin, well Essequibo drainage Guyana.