Lepthoplosternum ucamara
Roberto E. Reis and Cintia C. Kaefer
Два новых сома из семейства Callichthyidae из Бразилии и Перу
Two New Species of the Neotropical Catfish Genus Lepthoplosternum (Ostariophysi: Siluriformes: Callichthyidae)ABSTRACT
Two new species of the callichthyid catfish genus Lepthoplosternum are described from the Amazon region. Lepthoplosternum stellatum is described from a tributary of Lago Tefé, Amazonas, Brazil, and it is diagnosed from other Lepthoplosternum species by a unique combination of characters: lower lip with pointed, crenulate, triangular fleshy projections lateral to the medial notch, caudal peduncle comparatively shallow (15.7–18.9% SL), and dorsal fin usually with one unbranched and seven branched rays. Lepthoplosternum ucamara is described from the Pacaya-Samiria National Reserve in the lower Ucayali River, Loreto, Peru, and can be diagnosed from other Lepthoplosternum species by the following unique combination of characters: lower lip with short, rounded projections, caudal peduncle comparatively shallow (15.2–17.7% SL), and dorsal fin with two unbranched and six branched rays. The distribution of Lepthoplosternum altamazonicum is extended to include the varzea floodplains of the Solimões River and its tributaries in Brazil. A key to species of Lepthoplosternum is also included.
Roberto E. Reis and Cintia C. Kaefer
Copeia: Vol. 2005, No. 4, pp. 724–731.