Vertebrate Zoology 57(1): 5-15, doi:
Hemigrammus geisleri sp. n. - a new glass characid fish from the central Amazon basin, with a supplementary description of Hemigrammus mimus BÖHLKE, 1955 (Teleostei: Characiformes: Characidae)
Axel Zarske‡, JACQUES Géry‡ Senckenberg Naturhistorische Sammlungen Dresden, Museum für Tierkunde,, Dresden,, Germany
Corresponding author: Axel Zarske ( axel.zarske@senckenberg.de ) © Axel Zarske, JACQUES Géry. This is an open access article distributed under the terms of the Creative Commons Attribution License (CC BY 4.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited. Citation:
Zarske A, Géry J (2007) Hemigrammus geisleri sp. n. - a new glass characid fish from the central Amazon basin, with a supplementary description of Hemigrammus mimus BÖHLKE, 1955 (Teleostei: Characiformes: Characidae). Vertebrate Zoology 57(1): 5-15 |  |
Abstract
A new species – Hemigrammus geisleri sp. n. – from the central Amazon in Brazil (Amazonas) is described (Teleostei: Characiformes: Characidae). It is a small species of the genus Hemigrammus Gill, 1858 (lateral line incomplete, basis of caudal fin scaled, fi ve teeth in the second row of premaxillary bone), which differs from all congeners through the following combination of features: (1) two to four tri- to quincuspid teeth in the external row of premaxilla, (2) fi ve (rarely six) quincuspid teeth in the internal row of premaxilla, (3) one to two (rarely three) maxillary teeth, (4) 16–18 (mostly 17) branched anal fin rays, (5) 29–31, mean 30, longitudinal scales, (6) 8 to 14 pored scales in lateral line, (7) 4/1/3–3½ transversal scales before dorsal, (8) 32 to 33 vertebrae and (9) a oval spot at the basis of caudal fin.