Overview

Comprehensive Description

Astyanax totae ZBK :

rio Iguacu basin : MCP 37562 , 8, 49.1-81.9 mm SL, 11 Jul 2002 ; MHNCI 10305 , 1, 61.1 mm SL, rio Cascata, tributary of rio Tortuoso, an affluent of rio Iguacu , approx. 25°29’S49°39’W , 26 May 2002 ; MHNCI 10306 , 21, 34.4-73.4 mm SL (2 c&s), 26 May 2002 ; NUP 4099 , 16, 41.9-56.3 mm SL, 23 Jun 2002 ; MNRJ 28652 , 11, 36.9-66.3 mm SL, 9 Jan 2002 .

  • Vinícius Abilhoa, Luiz Fernando Duboc (2007): A new species of the freshwater fish genus Astyanax (Ostariophysi: Characidae) from the rio Iguacu basin, southeastern Brazil. Zootaxa 1587, 43-52: 51-51, URL:http://www.zoobank.org/urn:lsid:zoobank.org:pub:B2CDDEA9-F47C-444F-BA47-DB7D7EC8D49A
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Biology

Found in headwater stream with clear water, light to moderate water current and bottom consisting of stones, sand and moderate amount of vegetal debris (Ref. 56783). Feeds most frequently on microcrustaceans (Cladocera and Copepoda), insect larvae (Chironomidae), adult insects and plant fragments (Ref. 56783).
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Distribution

Southern Brazil.
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South America: Rio Cascata of the upper rio Iguaçu basin in Brazil.
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Physical Description

Size

Max. size

8.2 cm SL (male/unsexed; (Ref. 56783))
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Diagnostic Description

Distinguished from most species of Astyanax by the vertically elongated humeral spot, slightly expanded above the lateral line to posterodorsal margin of opercle, followed by a midlateral dark stripe expanded from the humeral region to the median caudal-fin rays, maxilla with 2-5 teeth (usually 3) and anal fin with 15-18 branched rays (Ref. 56783).Description: D. ii, 9; A. iii-iv,15, 16, 17, 18; P. 10-14; V. 8 (Ref. 56783).
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Ecology

Habitat

Environment

benthopelagic; freshwater
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Conservation

Threats

Not Evaluated
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