A new Corydoras Lacepede, 1803 (Siluriformes: Callichthyidae) from the rio Sao Francisco basin, Brazil

作者：Tencatt Luiz F C^*; Vera Alcaraz Hector S; Britto Marcelo R; Pavanelli Carla S

来源：Neotropical Ichthyology, 2013, 11(2): 257-264.

DOI：10.1590/S1679-62252013000200003

• Corydoradinae
• Mimetic communities
• Neotropical
• Rio Guarda-Mor
• Systematics

A new species of Corydoras is described from the rio Sao Francisco basin in northeastern Brazil, Minas Gerais and Bahia States. The new species is distinguished from most of its congeners by the anterior portion of the infraorbital 1 very large, conspicuously expanded towards the anteroventral margin of the snout and almost entirely covering its lateral margin. Other characters that distinguish the new species are the infraorbital 2 slender on its dorsal tip, contacting only sphenotic and not compound pterotic; and the presence of two laterosensory canals on trunk. A phylogenetic analysis including the new species found it sister-group of C. flaveolus, and both species sister-group of C. paleatus. An identification key to the species of the rio Sao Francisco basin is also provided.

• 出版日期2013-6-28