collected from the Rio Tiquié basin (right
bank tributary of the upper rio Negro) in the Amazonas
State and from the upper Rio Aripuaña (tributary
of the rio Madeira) in Mato Grosso State, Brazil,
extending the known distribution of this species into
the western limits of the Brazilian Shield. Description:
Dorsal spines (total): 1; Dorsal soft rays (total):
6; Anal soft rays: 12 - 16. Upper labial extension
very elongate, straight to weakly curved medially
and nearly uniform in width with a bluntly rounded
tip. Differs further from all Leptodoras
by having an adipose fin extending anteriorly as a
low thin ridge to a point midway between the anterior
insertion of the adipose fin and the posterior insertion
of the dorsal fin. Distinguished from L. acipenserinus
by a number of characters including a relatively longer
predorsal distance (35.5-38.7% SL), inner flap of
gill opening incomplete, lower sum of midlateral plates
(74-81), anal-fin shape (tip of longest branched ray
falls short of vertical through tip of last branched
ray in extended anal fin and is more or less even
with vertical through base of last ray; line defined
by tips angled anteriorly, forming a 45-90° angle
with long axis of body), pectoral-fin spine length
19.9-26.2% of SL and pectoral-fin spine dentation
with teeth strongly retrorse along majority of posterior
margin, becoming less retrorse distally, size relatively
uniform along distal half, last denticulation usually
subterminal. Aquarium Care: Best
kept in a group in a tank of 48ins or over with a
sand substrate, rock and branchwork. Floating plants
is a good addition to cut down on the overhead light.
Peaceful and will do
well alongside species such as Geophagus
Cichlids and other larger Characins that will appreciate
flowing water. Diet: Insect larvae,
frozen foods, mosquito larvae and shrimp.
Elongate Mouse Catfish
Upper Orinoco (rios Ventuari and Mavaca) and Casiquiare
River basin in Venezuela; Atlantic Coast drainages
of the Guianas and northern Brazil such as Essequibo,
Demerara and Araguari); the rios Uatumã, Tacutu
and Demini in Brazil.
no. 41 January 1984. Sabaj, M.H. and C.J.
Ferraris Jr., 2003. Doradidae (Thorny catfishes).
p. 456-469. 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,
Froese, R. and D. Pauly. Editors. 2008. FishBase.
World Wide Web electronic publication. www.fishbase.org,