Astyanax endy (Characiformes: Characidae), a new fish species from the upper Río Bermejo basin, northwestern Argentina.
Author
J. M. Mirande
Author
G. Aguilera
Author
M. D. L. M. Azpelicueta
text
Zootaxa
2006
1286
57
68
http://www.zoobank.org/urn:lsid:zoobank.org:pub:89EB739D-FFDE-44FD-AD0F-9E51CC3392FD
journal article
z01286p057
89EB739D-FFDE-44FD-AD0F-9E51CC3392FD
[[
Animalia
Characiformes
Characidae
Astyanax
genus
Astyanax
]]
Artificial key for identification of
Animalia
Characiformes
Characidae
Astyanax
genus
Astyanax
species from the Río Bermejo Basin
1a. A well defined humeral spot, rounded or horizontally oval; without maxillary teeth ...... 2
1b. A vertically elongated or diffuse humeral spot; with 1-4 maxillary teeth.. ................. 3
2a. Scales in lateral line 38 to 49 (usually 44-47); usually 28-30 branched anal-fin rays... ........................................................................................................................
Animalia
Characiformes
Characidae
Astyanax
abramis
species
A. abramis
2b. Scales in lateral line 33 to 40 (usually 34-36); usually 23-27 branched anal-fin rays... ..............................................................................................................
Animalia
Characiformes
Characidae
Astyanax
asuncionensis
species
A. asuncionensis
3a. Pigmentation pattern with longitudinal stripes in zigzag between rows of scales; scales with circuli on posterior field ........................................................................
Animalia
Characiformes
Characidae
Astyanax
lineatus
species
A. lineatus
3b. Pigmentation pattern not as above; scales without circuli on posterior field.. ............. 4
4a. Branched anal-fin rays 25 to 30 (usually 28-29); pectoral fins reaching pelvic fins, and pelvic fins reaching anal fin in mature males and females; 26-27 gill rakers on first branchial arch, outer premaxillary teeth tricuspidate ........................................
Animalia
Characiformes
Characidae
Astyanax
latens
species
A. latens
4b. Branched anal-fin rays 17 to 24; pelvic fins usually not reaching anal fin in mature females; 19-21 gill rakers on first branchial arch; usually with pentacuspidate teeth on outer premaxillary row .................................................................................................. 5
5a. Maxilla meeting mouth commissure at a straight angle, reaching a vertical through anterior border of eye; snout nearly straight; premaxillary and dentary teeth conspicuously expanded; 35-39 scales in lateral line .....................................................
Animalia
Characiformes
Characidae
Astyanax
chico
species
A. chico
5b. Maxilla meeting mouth commissure at an oblique angle, reaching the vertical through anterior border of pupil; snout markedly convex; premaxillary and dentary teeth not conspicuously expanded; 33-36 scales in lateral line .................................................. 6
6a. Pigmentation pattern reticulated, formed by finely dotted scales, especially in its posterior border; densely concentrated dark superficial chromatophores on third infraorbital, opercle, premaxilla, maxilla and dentary; hooks on all fins excepting pectorals in mature males, including 16-19 anterior anal-fin rays ...........................
Animalia
Characiformes
Characidae
Astyanax
tumbayaensis
species
A. tumbayaensis
6b. Without reticulated pigmentation pattern; superficial chromatophores scattered only on tip of dentary, and practically absent on third infraorbital, opercle, premaxilla, and maxilla; hooks only on pelvic fins and first 12 anal-fin rays of mature males .........
Animalia
Characiformes
Characidae
Astyanax
endy
species
A. endy