Florida Museum of Natural History

Helogenes castaneus

Helogenes castaneus

Photo by Mark Sabaj
Reproduced from Vari and Ortega (1986).

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Helogenes castaneus (Dahl, 1960)

Identification: Helogenes castaneus is readily distinguished from H. uruyensis in the number of anal-fin rays (43-49, vs. 32-37) and a number of morphometric differences. The presence of eight principal rays in the lower lobe of the caudal fin in H. castaneus separates it from H. marmoratus, which has nine principal rays in the lower lobe of that fin. The 43-49 anal-fin rays of H. castaneus discriminate that species form H. gouldingi, which as 39-43 anal-fin rays. Those two species are also separable in various morphometic characters, most notably their relative snout lengths and in the distance between the rayed and adipose dorsal fins. Maximum size: 47 mm SL.

Range: Helogenes castaneus is known from the upper Orinoco, Guaviare and Meta River basins, Colombia.

Information from Vari, R. P. & H. Ortega. 1986. The catfishes of the Neotropical family Helogenidae (Ostariophysi: Siluroidei). Smithsonian Contributions to Zoology, 442: 1-20.

distribution map

Distribution Map

This site is part of the All Catfish Species Inventory Project

Authored by Carl J. Ferraris, Jr. and Richard P. Vari
Webpage and map compiled by Griffin E. Sheehy
Contact: Carl J. Ferraris, Jr
Updated: July 18, 2007
Carl J. Ferraris, Jr
2944 NE Couch St.
Portland, OR 97232
Richard P. Vari
Smithsonian Institution
Washington, D.C. 20560