wallacei Vari & Ferraris, 2006
s we head to the end of 2015 our December factsheet concentrates
on a member of the Driftwood or Wood Cats, Tetranematichthys
wallacei. The Auchenipteridae family get their common name
due to their habit of hiding in hollow logs during the day.
There are three species in this genera
T. barthemi Peixoto & Wosiacki, 2010, T. quadrifilis
(Kner, 1858) and our factsheet of the month T. wallacei
Vari & Ferraris, 2006. Tetranematichthys wallacei is
the largest species out of the three listed and although still
relatively rare in imports, due to their crepsular habit in
their habitats, it is the one mostly seen in the hobby.
Showing the males extended
Distinguished from T. quadrifilis
in the alignment of the lateral margins of the head in the region
from the anterior margin of the orbit to the posterior limit of
the opercle (running approximately in parallel from ventral view
vs. diverging laterally, respectively); in the body width at the
pectoral-fin insertion as a proportion of the head width at the
posterior margin of the orbit (0.99-1.10 vs. 1.17-1.25, respectively);
in the distance from the tip of the snout to the anal fin origin
(0.29-0.32 of SL vs. 0.33-0.36 of SL, respectively); and in the
position of the anterior termination of the gill opening (one orbital
diameter posterior of the transverse plane running through the posterior
margin of the orbit vs. positioned in the transverse plane running
through the center of the orbit, respectively).
There is always a sense
of anticipation when this rare catfish comes on the market as
catfish enthusiasts make a bee line for the known source of
the import which usually in the U. K. is Pier Aquatics of Wigan,
England, where most catfish aficionados gather to see the latest
additions to our wonderful hobby.
Basic shades of brown to body. Black
speckles to body. Thin black stripe along lateral line.
It is carnivorous and prefers to feed on small
fish. Against conspecifics Tetranematichthys are peaceful.
A tank for Tetranematichthys
should contain fine sand on the bottom, should be softly
lit and should be equipped with a great number of driftwood.
During daytime the fish often sleep lying on the side. This
behaviour is absolutely normal and no reason for the aquarist
to become anxious.
The fertalisation is internal and managed
by a penis-like organ that is formed by modified rays of the anal
fin. It is said that after the breeding season the dorsal fin in
males reduces the size to that of the female.
Prefers live foods given at lights out.
Try different choices of frozen foods to see
what they prefer as they can be picky in their dietary requirements.
|The males develop an extended
dorsal fin and is thorny.
The primary rayed
fin(s) on top of the body.
Maxillary barbels: Pertaining
to the upper jaw. (maxillary barbels).
Opercle: The bony
covering of the gills of fishes.
Pectoral fins: The paired fins just behind
Anal fin: The median, unpaired, ventrally
located fin that lies behind the anus, usually on the posterior
half of the fish.
Greek meaning "fish with four threats"; this refers
to the barbels.With a carved breast-plate.
Named after Alfred
Russel Wallace when, starting in 1848, made large collections
of plants and animals in the Amazon basin.
and D. Pauly. Editors. 2008. FishBase. World Wide
Web electronic publication. www.fishbase.org, version (10/2008).
Vari, R.P. and C.
Ferraris Jr., 2006. The catfish genus Tetranematichthys
(Aucheniptridae). Copeia 2006(2):168-180.
Schäfer, Frank : Aquarium
Wallace's Driftwood Dolphin Catfish
America : Amazon basin:
upper Negro River system in Brazil and Venezuela and upper Orinoco
River basin in southern Venezuela.
|6.0 - 7.0.
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