Vivianne B. Sant'Anna, Maria Laura S. Delapieve, and Roberto E. Reis
A new species of Potamorrhaphis is described from the Amazon basin in Brazil and Peru. Potamorrhaphis labiatus, new species, is distinguished from P. guianensis and P. eigenmanni by having the posterior third of the labial membrane highly expanded laterally, reaching to or passing the level of the ventral margin of the maxilla when folded ventrally, and from P. petersi by having fewer dorsal- and anal-fin rays and a deeper caudal peduncle. A key for the species of Potamorrhaphis is provided.
Quelle: Copeia: December 2012, Vol. 2012, No. 4, pp. 663-669