Apteronotus acidops , new species of long snouted electric fish (Teleostei: Gymnotiformes: Apteronotidae) from the upper rio Paraná basin in Brazil, with a key to the apteronotid species from the area

Vertebrate Zoology

article

Mauro Triques¹ 

[1] Universidade Federal de Minas Gerais

关键词: Freshwaters;    Morphology;    Neotropical Region;    Ostariophysi;    Pisces;    South American electric fish;    Taxonomy.;   

DOI  :  10.3897/vz.61.e31154

学科分类：社会科学、人文和艺术（综合）

来源: Pensoft

【 摘 要 】

Apteronotus acidops, new species, is described from the upper Paraná River basin, Brazil. It can be diagnosed from the remaining species of the genus by the following combination of characters: dorsal snout profi le pointed; snout length 46.4 – 63.7 % of head length; oculo-nasal distance 39.2 – 72.1 % of postocular distance; lateral ethmoid with both dorsal and ventral extremities expanded, strongly oblique in orientation; mouth rictus surpassing vertical through anterior eye margin, including its skin folds, in all ages; dorsal head profi le nearly horizontal from a vertical through anus to posterior extremity of occipital bone; absence of mid-dorsal white or clear stripe on head and body anteriorly; chin brown; upper lip clear to a vertical through anterior nostril; transversal unpigmented bar or bars posteriorly on the body absent; flanks brown, darker dorsally and pectoral fin hyaline, with chromatophores over rays. Moreover, a key for the apteronotid species from the upper rio Paraná is provided.

【 授权许可】

CC BY