Dorsal spines (total): 2; Dorsal soft rays (total):
7; Anal spines: 1; Anal soft rays: 5. The genus Pseudolithoxus
now includes six species,P.
P. kelsorum, P. nicoi, and
Previously described as the Lasiancistrus anthrax
group. They are characterized by evertible cheek plates,
a very dorsoventrally flattened body, extremely hypertrophied
odontodes (integumentary teeth) on elongated pectoral
spines and along the snout margin, and 3 rows of plates
on the caudal peduncle. In addition, it appears as
if females as well as males develop hypertrophied
snout and pectoral-fin odontodes, traits normally
restricted to nuptial males in other Loricariids.
Colouration: Body colour light with
large, black spots at least anteriorly; spots may
combine posteriorly to form bars. Tips of dorsal and
caudal spines with light orange to cream-coloured
spots. Lateral line plates 24-25; dorsal plates 6-9;
interdorsal plates 6-7; adipose-caudal plates 6-7;
folded dorsal fin plates 11-14; and postanal plates
11-13.Aquarium Care: I
would suggest a minimum size of 48” x 18”
X 18” for one or two of these catfish, with
plenty of hiding places amongst bogwood and plantsand
the ideal aquarium substrate to use would be aquarium
sand such as BD Aquarium Sand. As with all other species
of fish, water quality and general husbandry is very
important, and I would recommend that a minimum of
25% water is changed on a weekly basis. This fish
has similar requirements to other loricariids, so
should do well under normal aquarium conditions. Sexual
Differences: Females have a narrower head
with a larger body while males possess odontodes on
the edge of the snout, behind the gill cover and to
the pectoral fin spine. Diet: Omnivore:
vegetable and animal foods such as green foods, vegetable
tablets, live and frozen foods.
Orinoco Basin, upper and Casiquiare River basins.
Armbruster, J.W. and
2000. Four new species of the suckermouth armored
catfish genus Lasiancistrus (Loricariidae: Ancistrinae).
Ichthyol. Explor. Freshwat. 11(3):241-254.
164. Feb 2010