Bryconamericus macarenae n. sp. (Characiformes, Characidae) from the G邦ejar River, Macarena mountain range, Colombia

作者：C Romans Valencia; C Garcia Alzate; R I Ruiz C; D C Taphorn

来源：Animal Biodiversity and Conservation, 2010.

• Bryconamericus macarenae n. sp.
• Tropical
• River
• Freshwater
• Osteology
• Teeth

Based on 174 specimens, using morphometric, meristic and osteological characters, we describe a new species: Bryconamericus macarenae from the G邦ejar River in La Macarena mountain range,Orinoco Basin, Colombia. It differs from congeners in having: an incomplete lateral line (vs. complete lateral line in all except B. delta) and fewer and less conspicuous perforations in the latero每sensorial canal of the extrascapular bone (vs. conspicuous latero每sensorial canal perforation). It has four or fewer unbranched anal-fin rays (vs. five or more unbranched anal每fin rays), a short, thickened extrascapular bone without projections from the posterior margin, or with only a reduced apophysis (vs. extrascapular long, irregular, bony projections on its margins, and with a large undulated apophysis on its posterior margin). It also differs in live coloration. A key of species of Bryconamericus known from the Orinoco Basin and the Catatumbo River is included.