Sistemática dos Peixes da Subfamília Corydoradinae (Siluriformes Callichthyidae) da Coleção Ictiológica do Museu Paraense Emílio Goeldi (MPEG)

Abstract

The Coridoradinae (Callichthyidae) are distinguished from the others by having a laterally compressed head, short rictal barbels (rising just beyond the operculum opening), and a single pair of short mental barbels on the lower lip. They are fishes with sedentary habits and slow swimming, known as "camboatazinho". The present work aimed to systematically study the specimens of Corydoradinae from the ichthyological collection of the Museu Paraense Emílio Goeldi. The study of the collections is essential for Systematics and Taxonomy, functioning as a permanent source of data on biodiversity. The specimens were morphologically analyzed with the aid of a stereoscopic microscope, with magnifications ranging from 10 to 40 x. Measurements were made with the aid of a pachymeter to the tenth of a millimeter. At first, some specimens were identified as Callichthyidae, and in the present study their identifications were corrected to Brochis splendens, Callichthys callichtys, Hoplosternum Littorale, H. magdalena, Megalechis thoracata; M. personata. The specimens of Corydoras were identified as morphospecies and in the present study were found to be representatives of Corydoras hastatus, Corydoras p unctatus and Corydoras trilineatus. A total of 265 specimens were analyzed, being Brochis splendens (n=37), Callichthys callichthys (n=3) Corydoras hastatus (n=177), Corydoras punctatus (11=3) and Corydoras trilineatus (n=15). It is appropriate to comment on the inclusion of the Callichthyinae species timely reviewed; Hoplosternum littorale (n=5), Hoplosternum magdalenae (n=l), Megalechis personata (11=2), Megalechis thoracata (n=21).