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Astyanax
Publication Data, Additional Information (status, external links, etc)
treatment citation J. M. Mirande, G. Aguilera & M. D. L. M. Azpelicueta, 2006, Astyanax endy (Characiformes: Characidae), a new fish species from the upper Río Bermejo basin, northwestern Argentina., Zootaxa 1286, pp. 57-68: 66
publication ID z01286p057
link to original citation http://www.zoobank.org/urn:lsid:zoobank.org:pub:89EB739D-FFDE-44FD-AD0F-9E51CC3392FD
treatment provided by Thomas
persistent identifier http://treatment.plazi.org/id/920F3067-FDE5-CB6B-6A7D-B8A123DDDFD0
additional text versions Plain XML   TaxonX
scientific name Astyanax  
status  
external databases ZBK
distribution map  
Treatment

[[ Astyanax ZBK ]]

Artificial key for identification of Astyanax ZBK 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... ........................................................................................................................ A.abramis

2b. Scales in lateral line 33 to 40 (usually 34-36); usually 23-27 branched anal-fin rays... .............................................................................................................. A.asuncionensis ZBK

3a. Pigmentation pattern with longitudinal stripes in zigzag between rows of scales; scales with circuli on posterior field ........................................................................ 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 ........................................ A.latens ZBK

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 ..................................................... A.chico ZBK

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 ........................... A.tumbayaensis ZBK

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 ......... A.endy

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