A new, unusually sexually dimorphic species of Bryconamericus (Pisces: Ostariophysi: Characidae) from the Peruvian Amazon
Proceedings of the Biological Society of Washington
1990
Journal Article
103
3
516-524
Parque Nacional del Manu Animals Chordates Vertebrates Fish Pisces Ostariophysi Characidae new species taxonomy systematics Bryconamericus morphology Madre de Dios Bibliography
Bryconamericus pectinatus, a new species of characid fish, is described from the Rio Manu basin in southeastern Peru. Males of the species are characterized by unique elaborations of the distal portions of the anterior branched rays of the anal fin. They are also distinctive in the expansion of the anterior basal pterygiophores and of the anal fin, and in the presence of lobulate bodies, evidently consisting of glandular tissue, along the base of the anterior portion of that fin.