Overview

Distribution

Aguaytia and Pachitea rivers in Ucayali River basin, Peru.
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South America: Aguaytia and Pachitea rivers in the Ucayali River basin.
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Physical Description

Morphology

Dorsal soft rays (total): 10; Analsoft rays: 14 - 20
  • Vari, R.P. and H. Ortega 2000 Attonitus, a new genus of sexually dimorphic characiforms (Ostariophysi: Characidae) from western Amazonia; a phylogenetic definition and description of three new species. Ichthyol. Explor. Freshwat. 11(2):113-140. (Ref. 53400)
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Size

Max. size

5.0 cm SL (male/unsexed; (Ref. 38376))
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Diagnostic Description

The lack of a dark humeral mark distinguishes Attonitus ephimeros from Attonitus irisae which has a distinct, vertically-elongate humeral bar. The presence on the body wall above the anal-fin base of a band of dark pigmentation which is distinctly wider over the second and third branched anal-fin rays and has a rounded anterior margin in Attonitus ephimeros separates that species from Attonitus bounites which lacks such pigmentation.Description: Dorsal-fin with 2 unbranched and 8 branched rays. Anal-fin with 3 unbranched and 14-17, typically 15-16, branched rays (Ref 53400).
  • Vari, R.P. and H. Ortega 2000 Attonitus, a new genus of sexually dimorphic characiforms (Ostariophysi: Characidae) from western Amazonia; a phylogenetic definition and description of three new species. Ichthyol. Explor. Freshwat. 11(2):113-140. (Ref. 53400)
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Type Information

Paratype for Attonitus ephimeros Vari & Ortega
Catalog Number: USNM 349708
Collection: Smithsonian Institution, National Museum of Natural History, Department of Vertebrate Zoology, Division of Fishes
Preparation: Glycerin with Cartilage Stain; Hardcopy photograph on file
Collector(s): H. Ortega
Year Collected: 1987
Locality: Peru: Departamento De Junin, Provincia Chanchamayo, La Merced, El Kimo, Rio Chanchamayo, Peru, South America
  • Paratype: Vari, R. P. & Ortega, H. 2000. Ichthyological Exploration of Freshwaters. 11 (2): 129, fig. 4.
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Paratype for Attonitus ephimeros Vari & Ortega
Catalog Number: USNM 349696
Collection: Smithsonian Institution, National Museum of Natural History, Department of Vertebrate Zoology, Division of Fishes
Preparation: Glycerin with Cartilage Stain
Collector(s): F. Chang
Year Collected: 1997
Locality: Peru: Departamento De Cuzco, Provincia La Convencion, Rio Urubomba, Rio Picha, Puento Huallana, Quebrada Mapichiriato, Peru, South America
  • Paratype: Vari, R. P. & Ortega, H. 2000. Ichthyological Exploration of Freshwaters. 11 (2): 129, fig. 4.
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Paratype for Attonitus ephimeros Vari & Ortega
Catalog Number: USNM 349714
Collection: Smithsonian Institution, National Museum of Natural History, Department of Vertebrate Zoology, Division of Fishes
Collector(s): H. Ortega
Year Collected: 1987
Locality: Peru: Departamento De Junin, Provincia Chanchamayo, La Merced, Rio Mijandari, Along Road From La Merced To Villa Rica, Pasco, Peru, South America
  • Paratype: Vari, R. P. & Ortega, H. 2000. Ichthyological Exploration of Freshwaters. 11 (2): 129, fig. 4.
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Paratype for Attonitus ephimeros Vari & Ortega
Catalog Number: USNM 349713
Collection: Smithsonian Institution, National Museum of Natural History, Department of Vertebrate Zoology, Division of Fishes
Collector(s): H. Ortega & et al.
Year Collected: 1995
Locality: Peru: Departamento De Junin, Provincia Satipo, Rio Satipo Basin, Rio ENE, Quebrada Lorida, Peru, South America
  • Paratype: Vari, R. P. & Ortega, H. 2000. Ichthyological Exploration of Freshwaters. 11 (2): 129, fig. 4.
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Ecology

Habitat

Environment

pelagic; freshwater
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Conservation

Threats

Not Evaluated
  • IUCN 2006 2006 IUCN red list of threatened species. www.iucnredlist.org. Downloaded July 2006.
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