The main description for A. biscutatus is
that the body and adipose fin in adults is either
light brown or grey with small, distinct spots on
the rayed fins that do not form bands. The shape of
the nuchal plate is also distinctive from all other
congeners in the genera. The species depicted in the
first thumbnail image was originally thought to be
a a juvenile of A. occidentalis. Habitat:
Commonly occurs in running water, lakes and submerged
vegetation in the Sudd, rare in fringing vegetation.
Abstract: The taxonomic history of
the African catfish genus Auchenoglanis includes
eight nominal species, with two of these, Auchenoglanis
biscutatus and Auchenoglanis occidentalis,
being recognised as valid by most authors. The validity
of all eight species was recently established based
on mainly pigmentation-related characters and the
shape of the premaxillary tooth plates. As these results
opposed previous works but lacked any mention of these,
the species diversity in the genus was re-evaluated
based on biometric, meristic and other morphological
data. It reconfirms the status of only two valid species
within the genus. Auchenoglanis occidentalis
ranks among the African fish species with very large
distribution areas, being present from Senegal to
Tanzania. Auchenoglanis biscutatus is distinguished
from A. occidentalis by a postorbital head
length that is greater than the preorbital head length,
an adipose fin that rises abruptly, and a maxillary
barbel with a tip not darker than the head colour.
Reproduction: Gravid fish are recorded
throughout the year with a peak in the dry season.
Teugels et al. (1991) considered the genus Auchenoglanis
to be comprised of two valid species: A. biscutatus
and A. occidentalis.Due to the
work carried out recently (2010) by Michael Retzer
there are now 8 in this genus with six new species,
(now considered a synonym of A. occidentalis)
A. sacchii, A.
senegali, (now considered a synonym
of A. biscutatus) A.
tchadiensis and A.
Feeds on the bottom on mud, debris, insects, notably
chironomid larvae and mollusks. (Geerinckx & Vreven
A. senegali Retzer, 2010 is now considered
a synonym of A. biscutatus.
Nile, Niger, Senegal, Lake Chad Basin and Gambia basin.
1994 Guide to the fishes of the River Nile in the
Republic of the Sudan. J. Nat. Hist. 28:937-970. Retzer E. Michael;
Taxonomy of Auchenoglanis Günther 1865 (Siluriformes:
Auchenoglanididae) Zootaxa 2655: 25–51 (2010).
Tom Geerinckx & Emmanuel Vreven
(2013) A re-evaluation of the species-level diversity
within the catfish genus Auchenoglanis (Siluriformes:
Claroteidae), Journal of Natural History, 47:47-48,