Pseudanos gracilis
No common name
Collection Details
Specimens
Photos
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Records
Taxonomic Hierarchy
Actinopterygii (Ray-finned Fishes)
Characiformes (Characins)
Anostomidae (Headstanders)
Pseudanos
Pseudanos gracilis
Description
This species account was compiled from
FishBase (Froese, R. and D. Pauly. Editors. 2025. FishBase. World Wide Web electronic publication. www.fishbase.org, version 04/2025.)
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Characters
Body shape: fusiform / normal. Can be diagnosed by having the following characters: four branchiostegal rays; dark spots absent on the center of each body scale; and angle of the dorsal and ventralmost radii of body scales between 110° and 180° (Ref. 91907).
Distribution
South America: Guaporé, Negro and Orinoco River basins.
Habitat Associations
Freshwater. benthopelagic. depth range 0-1 m.
Biology
Adults are found in crevices in fast-flowing creeks (Ref. 598). Distinct pairs breed on densely grown weedy places (Ref. 205).
Max length: 18.1 cm SL; common length: 14.0 cm TL.
Reproductive mode: dioecism; fertilization: external; guarders (nesters). Distinct pairs breed on densely grown weedy places (Ref. 205).
IUCN Red List Status: Least Concern (LC), assessed 2020-06-26. Resilience: High (Preliminary K or Fecundity.).
Commercial or Environmental Importance
Fisheries: commercial; aquarium: commercial.
References
Breder, C.M. and D.E. Rosen (1966) Modes of reproduction in fishes. T.F.H. Publications, Neptune City, New Jersey. 941 p.
Géry, J. (1977) Characoids of the world. Neptune City ; Reigate : T.F.H. [etc.]; 672 p. : ill. (chiefly col.) ; 23 cm.
Baensch, H.A. and R. Riehl (1985) Aquarien atlas. Band 2. Mergus, Verlag für Natur-und Heimtierkunde GmbH, Melle, Germany. 1216 p.
Garavello, J.C. and H.A. Britski (2003) Anostomidae (Headstanders). p. 71-84. In R.E. Reis, S.O. Kullander and C.J. Ferraris, Jr. (eds.) Checklist of the Freshwater Fishes of South and Central America. Porto Alegre: EDIPUCRS, Brasil.
Birindelli, J.L.O., F.C.T. Lima and H.A. Britski (2012) New species of Pseudanos Winterbottom, 1980 (Characiformes: Anostomidae), with notes on the taxonomy of P. gracilis and P. trimaculatus. Zootaxa 3425:55-68.
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