The Pimelodid catfish genus Cheirocerus Eigenmann
is redefined on the basis of its specialised lips,
premaxilla and swim bladder. Sovichthys Schultz
is synonymized with Cheirocerus. A revision
of Cheirocerus reveals that C. leptus
(Eigenmann and Pearson) is a synomym of C. goeldii(Steindachner). The three species of Cheirocerus
can be readily distinguished on the basis of total
number of gill rakers on the first arch: 17-21 in
C. eques, 23-27 in C. goeldii and
30-33 in C.
pattern, form of the occipitaland
other differences also help to distinguish the species.
Habitat: C. eques and C.
goldeii are known from large, turbid rivers of
the Amazon basin, and C. abuelo is known
only from the Lago Maraciabo basin of northwestern
Venezuela. The apparent absence of Cheirocerus
in the Rio Orinoco basin is an interesting discontinuity,
but may reflect the need for further exploration.
Aquarium Care: Not a lot of information
is forthcoming for this genus but they are nocturnal
and a mid sized pim with sizes ranging from 15-20
cm. SL. Diet: Mostly consists of
benthic invertebrates, with chironomid larvae being
a dominant component, but also including ostracods
and mayfly nymphs.
Amazon River basin. Type locality:
Villa Bella [Bolivia].
Ferraris, C.J. Jr.,
2007. Checklist of catfishes, recent and fossil (Osteichthyes:
Siluriformes), and catalogue of siluriform primary
types. Zootaxa 1418:1-628. Froese, R. and D. Pauly. Editors.
2021. FishBase. World Wide Web electronic publication.
www.fishbase.org, ( 09/2021 ). Lundberg, J.G. and M.W. Littmann,
2003. Pimelodidae (Long-whiskered catfishes). p. 432-446.
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. Cheirocerus eques Eigenmann, 1917
Observed in Peru by Anthony Giardenelli. www.inaturalist.org