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Hypoptopoma psilogaster Fowler, 1915

Image contributors to this species:

Johnny Jensen's Photographic Library (2) 

ScotCat Sources:

Etymology = Genus 

Other Sources:

Fishbase  Search Google   All Catfish Species Inventory

Relevant Information:

This genus is recognised by the flat head and large eyes that are set latterly on the head and their heavy body armour. The ventral region is also armored and you can sometimes identify a species by the pattern on the underbelly. In saying that the species in this genus are notoriously difficult to identify and most of the time you would need the location of the catchment area or even down to the river itself to pinpoint a certain species. Vertebrae: 28 - 27. This species is distinguished from its congeners by the presence of an elongated dark spot along the middle caudal-fin branched rays, not involving the lanceolate plates at the base of the fin; the spot is typically extended over equal number of upper- and lower-lobe branched rays and along more than two thirds of the ray length. Sexual Differences: Male urogenital papilla short and conical, covered by anterior flaplike anus. Males with patch of tightly arranged small odontodes, variably covering first to fourth plates of ventral series, lateral to urogenital papilla. Males with poorly developed soft-tissue flap along posterior margin of pelvic spine. Female anus tubular, without separate urogenital papilla. In females, size and arrangement of odontodes on plates lateral to anus similar to adjacent plates, without distinct patch of differentially arranged odontodes. Female pelvic spine without flap of soft tissue on posterior surface.

Common Name:







South America: Rio Ampiyacu, Itaya, Nanay, Napo, and Yaguas in Western Amazon. Type locality: Peruvian Amazon.


7cm. (2¾ins)


23-27°c (73-81°f.)




Aquino, A.E. and S.A. Schaefer 2010 Systematics of the genus Hypoptopoma Günther, 1868 (Siluriformes, Loricariidae). Bull. Amer. Mus. Nat. Hist. 336:1-110
Ferraris, C.J. Jr., 2007. Checklist of catfishes, recent and fossil (Osteichthyes: Siluriformes), and catalogue of siluriform primary types. Zootaxa 1418:1-628.



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