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

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

The possession of a dark, vertically elongate humeral bar in mid-sized and larger specimens or the presence of a diffuse patch of chromatophores in that region in the smaller individuals examined distinguishes Attonitus irisae from Attonitus bounites and Attonitus ephimeros. Dorsal fin with 2 unbranched and 8 branched ray. Anal fin with 3 unbranched and 14-17, most commonly 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 irisae Vari & Ortega
Catalog Number: USNM 349698
Collection: Smithsonian Institution, National Museum of Natural History, Department of Vertebrate Zoology, Division of Fishes
Preparation: Glycerin with Bone Stain
Collector(s): E. Holm & et al.
Year Collected: 1988
Locality: Peru: Departamento Huanuco, Provincia Pachitea, Rio Huambo, At Mouth Into Rio Pachitea., Peru, South America
  • Paratype: Vari, R. P. & Ortega, H. 2000. Ichthyological Exploration of Freshwaters. 11 (2): 133, fig. 5.
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Paratype for Attonitus irisae Vari & Ortega
Catalog Number: USNM 349710
Collection: Smithsonian Institution, National Museum of Natural History, Department of Vertebrate Zoology, Division of Fishes
Collector(s): H. Ortega & G. Contreras
Year Collected: 1983
Locality: Peru: Departamento De Ucayali, Provincia Padre Abad, Rio Huacamayo, Under Bridge At km 155 On Road From Tingo Maria To Pucallpa, Peru, South America
  • Paratype: Vari, R. P. & Ortega, H. 2000. Ichthyological Exploration of Freshwaters. 11 (2): 133, fig. 5.
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Paratype for Attonitus irisae Vari & Ortega
Catalog Number: USNM 349704
Collection: Smithsonian Institution, National Museum of Natural History, Department of Vertebrate Zoology, Division of Fishes
Collector(s): F. Chang & et al.
Year Collected: 1994
Locality: Peru: Departamento De Ucayali, Provincia De Padre Abad, Rio Aguaytia, Boqueron Padre Abad, Velo De Novia, Peru, South America
  • Paratype: Vari, R. P. & Ortega, H. 2000. Ichthyological Exploration of Freshwaters. 11 (2): 133, fig. 5.
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Paratype for Attonitus irisae Vari & Ortega
Catalog Number: USNM 349697
Collection: Smithsonian Institution, National Museum of Natural History, Department of Vertebrate Zoology, Division of Fishes
Collector(s): F. Chang & et al.
Year Collected: 1994
Locality: Peru: Departamento Ucayali, Provincia Padre Abad, Rio Huacamayo, Rio Aguaytia Basin, Peru, South America
  • Paratype: Vari, R. P. & Ortega, H. 2000. Ichthyological Exploration of Freshwaters. 11 (2): 133, fig. 5.
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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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