hen I first came into
the fishkeeping hobby more years ago than I care to
remember my first 'wow' factor was discovering catfish
and one of my first acquisitions was a much loved
Leiocassis, namely stenomus which
as you know is of course now Pseudomystus.
There is not a lot left
now in theLeiocassis
genera (9 species) but the first
factsheet of 2017 celebrates this genus and our factsheet
of the month, the not often seen Leiocassis poeciloptera.Pseudomystus was actually a subgenus
of Leiocassis which K.C.Jayaram had placed
stenomus in in 1968, but is now of course a
full genus name. On many online sources this species
is still to be found as L. poecilopterus butthe specific name change to poeciloptera
is now valid (2021).
micropogon. The main
differences are that in L. poeciloptera the
posterior tip of the supraoccipital process
reaches the predorsal (nuchal) plate, whereas in L.
not. This method of identification is however made
problematic for us aquarists with the recent description
of L. aculeata which is similar to both species.
In L. aculeata the supraoccipital process
also meets the nuchal plate (as in L. poeciloptera),
but L. aculeata has a relatively longer
adipose fin, dorsal fin spine, and pectoral fin spines
than L. poeciloptera. In addition, there
are currently 6 or 7 species that have been tentatively
deemed as synonyms of either L. poeciloptera
or L. micropogon including L. hosii (which
is now a synonym of L. micropogon).
Also similar is
perhaps the easiest way to tell them apart is that
L. poeciloptera lacks the thin pale
collar band, the bar in the caudal is nearer the outer
margin, and the anal fin is barred.
This species inhabits
small streams with gravel bottoms of the Kolok River.
It lives under the rock crevices in 1.5-2.0 m depth.
P., The Fishes of the Indian Archipelago
described and elucidated. Volume 1 Silur. Batavia
Typus Lange Et Co. 1858.
Java, Borneo and possibly elsewhere in Southeast Asia.
Type locality: rivière de
Hèbak à Java.
Head slightly compressed. Mouth
small, subterminal position. Barbels short, maxillary
barbel reaching only behind eye, maxillary barbel
length 33.8-44.9 %HL, nasal barbel length 14.4-16.8
%HL, outer mandibulary barbel length 21.6-31.6 %HL
and inner mandibulary barbel length 14.8-16.1 %HL.
Adipose fin origin slightly anterior to anal fin origin.
Depressed dorsal fin reaching adipose fin. Caudal
fin forked; tip of upper and lower lobe pointed. Posterior
border of anal fin slightly round. Head depth at eye
38.0-39.8 %HL, head width at eye 47.6-50.0 %HL. Snout
produced, tip of snout pointed when look from below
head, snout length 36.6-36.7 %HL.
Colour of body darkish or deep
brown-reddish, with broad, transverse, irregular bands,
deeply dark, the 1st band nucho-opercular, the 2nd
dorso-ventral, the 3rd adipose-anal, the 4th caudal.
The bands are crossed along the lateral line by a
longitudinal, deep brown stripe. Fins deep brown-reddish,
blackish-dark, with two broad blackish-dark double
bands; iris blue.
Care & Compatibility
Can only be kept with the same
or larger species as this bagrid, common with many
from this family, can eat smaller fish. Keep either
3-5 specimens in a large tank with plants to the background.
Substrate should be sand and provide hiding places
with good filtration. Can be kept in a community tank
but would watch if housing an adult with smaller Characins
or Livebearers as they could be picked of at night
when it starts cruising the tank. They
can also nip the fins of larger species, so keep well
fed with a feeding after lights out to curb this aggression.
but they are oviparous, distinct
pairing possibly like other members of the same family.
Feeds on aquatic insects and
small crustaceans in its narural habitat. A wide variety
of foods can be given in the aquarium as this species
is not fussy as long as it is fed, preferably after
lights out. If you know where it hides out during
the day you can drop tablet food, frozen food etc.into
its resting place underneath stones/slates or bogwood.
Adipose fin:Fleshy finlike projection without rays, behind
the rayed dorsal fin. Anal fin: The median, unpaired, ventrally
located fin that lies behind the anus, usually on
the posterior half of the fish. Caudal: The tail. Nuchal: Area between the skull and
dorsal fin.. Supraoccipital process: Unpaired
bone at the back of the skull, usually with a crest.. Synonym:Different name for the same fish.
Smooth head. poeciloptera: With mottled
or variegated fins.