e concentrate this month
(Oct. 2008) on a not to common species from
the Auchenipteridae family and a close relative to
its congener Liosomadoras
oncinus, which was
our factsheet subject 3 years ago in January 2005.
In 1940, Fowler
described a new species from Peru, Liosomadorus
morrowi, and placed it in the Doradidae family
even although it did not have the bony scutes that
this family possess, but it had the spiny humeral
process of this family.
In 1978 an article
on Liosomadoras oncinus with illustrations
appeared in the TFH magazine by Martin Brittan and
it alerted the Ichthyologist, Mees, who subsequently
published a paper on oncinus. Mees noted
that the fish in the article, which was mooted as
a Centromochlus species, looked very like
the original description which was discovered in Brazil
by R. H. Schomburgk in 1841. He obtained specimens
from Brittan and also the type specimen of our factsheet
subject, L. morrowi and concluded, incorrectly,
that they were one and the same fish and placed it
in the Doradidae family. It was not until 1994 that
these two species were considered as separate and
they were placed in the Auchenipteridae family.
is the exact opposite of the beautifully marked oncinus,
and in the aquarium, just like its congener you may
not see too much of it as it can be crepuscular in
nature and will need hiding places to make it feel
more secure and happy in its surroundings.
authors - Liosomadoras
is my Liosomadorus morrowi, the Black Jaguar
Catfish. I was given this fish by a friend who had
bought it as a Jaguar Cat and did not know what it
was. You may find the common name of the Black Jaguar
Catfish misleading from this picture, but this photo
was taken on the show bench and it had lost the dark
markings that you will find when it is settled in
your tank set up.
in the Rio Ucayali basin. Type
locality: Ucayali River basin, Contamana,
Body short and compact with
a compressed caudal peduncle. Head, large and broad,
its width at the clavicles greater than its length.
The long humeral extension has small spines and the
barbels are thin and filamentous without branches.
Dorsal spine has teeth on anterior and posterior edges.
Pectoral spines have outer and inner margins strongly
denticulated. Adipose fin is the same length as the
anal fin, ventral fins short and positioned nearer
the anal fin than the pectoral fin base. Caudal fin
with gold lateral line interspersed
with gold and black spots. Underneath body, gold
with black spotting which can extend into the head
area. Unpaired fins
with black spots. Can
tend to change its body colour from dark to light
according to the substrate.
Care & Compatibility
Can be kept in a community
tank but may eat very small fish at night such as
the fry of livebearers, but basically a good addition
to the larger tank set up. My speciman is kept in
a 48" x 18" x18" with a large Synodontis
nigrita and a Pike Cichlid, so it has plenty
of room. I don't see it very often, only If I am rearanging
the tank layout. Can
be territorial with its own kind but you can get round
this by providing extra cover such as pipes and driftwood.
There are no known
reported aquarium spawning's of this catfish but can
be sexed due to the thickening of the anterior of
the anal fin, as is the norm in this family, akin
to the anal fins of the males of the Goodiae family
Will take most prepared foods
such as frozen bloodworm, tablet and flake food. Better
to feed at night after lights out, but once settled
in tank will forage for food in low light conditions.
From the Greek leios, meaning smooth; soma; meaning
body and Doras (a genus of doradid catfishes); in
reference to the lack of bony plates on the body (when
the genus was described as a doradid). morrowi: For William Morrow,
who collected this fish.
Corner, The Jaguar Catfish, Tropical Fish Hobbyist;