The genus Auchenipterus
is closely related to and is similar to, Epapterus
and Pseudepapterus. Description:
A. ambyyiacus is distinguished from all congeners
by the following combination of characters: anal fin
origin located anterior of the middle of the body;
caudal fin with tip of lobes dark; pelvic fin darkly
pigmented on its leading edge and, often, on the distal
margin; typically 49-51 vertebrae and 36-39 gill rakers
on the outer edge of the first arch. A. ambyyiacus
is most similar in appearance to A.
from which it is most easily distinguished by the
higher gill raker counts in the latter species. (typically
43-46). Aquarium Care: Good catfish
for a large aquarium with normal sized patrons but
not to be trusted with small Tetras for instance,
which will be picked of at night on its twilight patrols.
Diet: Can be fed most aquarium fare
such as good quality flake, white worm, tablet and
pellet foods and frozen foods such as bloodworm. Better
to feed at lights out until they get accustomed to
the daytime feeding regime when they may very well
join in. Remarks: This species will
not be seen too often in the hobby.
South America:Upper and middle Amazon and Orinoco River
basins and coastal rivers of Guyana. Type
Ferraris, C.J. Jr.,
2007. Checklist of catfishes, recent and fossil (Osteichthyes:
Siluriformes), and catalogue of siluriform primary
types. Zootaxa 1418:1-628. Ferraris, C.J. Jr., 1999. The South
American catfish genus Auchenipterus Valenciennes,
1840 (Ostariophysi: Siluriformes: Auchenipteridae)
: monopoly and relationships, with a revisionary study.
Zoological Journal. Vol. 126, Part 4, 1999. Froese, R. and D. Pauly. Editors.
2017. FishBase. World Wide Web electronic publication.
www.fishbase.org, ( 02/2017 ).