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Imparfinis usmai Ortega-Lara, Milani, DoNascimiento, Villa-Navarro & Maldonado-Ocampo, 2011

Image contributors to this species:

Nathan Lujan (3)

ScotCat Sources:

Etymology = Genus Etymology = Species

Other Sources:

Fishbase  Google Search  All Catfish Species Inventory

Relevant Information:

Small heptapterid catfish (largest specimen 100.8 mm SL), with elongated body, triangular in cross-section at dorsal-fin origin, progressively more laterally compressed to tail region. Dorsal profile slightly convex from snout tip to dorsal-fin origin, slightly concave just posterior to dorsal-fin base to adiposefin origin, straight and descending along adipose-fin base, then ascending along caudal peduncle. Ventral profile of head straight, slightly convex along abdomen, then straight to analfin origin and slightly descending along caudal peduncle. Aquarium care: Peaceful towards conspecifics but territorial with its own kind. Provide a moderate sized aquarium with hiding places such as bogwood, rockwork and plants. A good water flow is recommended with good aeration and filtration. Diet: Live, frozen and flake foods.

Common Name:







South America: Colombia. Distributed along the upper basin of río Cauca and río Magdalena, and in the lower río Patía basin on the Pacific slope of western cordillera of Colombia. Imparfinis usmai is sympatric with I. nemacheir in the río Magdalena.


10.0cm. (4ins)


20-24°C (67-75°F)




Froese, R. and D. Pauly. Editors. 2009.FishBase. World Wide Web electronic publication. www.fishbase.org, version (09/2017).
Ortega-Lara, A., N. Milani, C. DoNascimiento, F. Villa-Navarro and J.M. Maldonado-Ocampo, 2011. Two new trans-Andean species of Imparfinis Eigenmann & Norris, 1900 (Siluriformes: Heptapteridae) from Colombia. Neotrop. Ichthyol. 9(4):777-793.



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