his month (September 2011) we welcome
back for a second month, Adrian Taylor, member of the Catfish
Study Group. This month he takes a
look at a small Sisorid catfish Glyptothorax
Glyptothorax buchanani is a
small to medium sized hillstream catfish growing no more than
75mm SL from Metum, which is a small swift affluent of the Mechem
in Northern Thailand. It was first described by Smith in 1945
and is like all Glyptothorax species in having a '‘thoracic
adhesive apparatus’, which consists of many corrugated
folds of skin, on the ventral surface behind the mouth. Smith
noted at the time that this adhesive apparatus was roughly quadrangular
with an acute point anteriorly, and that unlike the Glyptothorax
species previously described, Glyptothorax buchanani differed
in the combination of a short body, a moderately elongate caudal
peduncle and with the origin of the ventral fins being under
the last ray of the dorsal fin.
Care of Glyptothorax buchanani
is as the norm for hillstream catfishes. An aquarium having
a pH of between 6 and 7 a temperature range between 20ºc
and 25ºc, a sand substrate, with a scattering of smooth
rounded stones, pebbles and small pieces of bogwood; heavily
filtered as to create a one directional flow of water as is
possible, along with a strong water changing regime, would go
towards making an ideal habitat for these attractive but unusual
Smith named this attractive catfish in
honour of A. R. Buchanan of the Borneo Company Ltd, who had
collected for scientific purposes many fishes of the Mechem
river and its tributaries, during the months of June, July,
October and November of 1935, something that no one had done
Thoracic adhesive apparatus, which consist
of many corrugated folds of skin, on the ventral surface behind
the mouth. Roughly quadrangular
with an acute point anteriorly. short
body, a moderately elongate caudal peduncle and with the origin
of the ventral fins being under the last ray of the dorsal fin.
Pretty body colour of
dusky brown head region with three dark brown patches on the dorsal
and into the body, adipose fin with dark brown patch leading into
the body, caudal peduncle with dark brown patch leading to half
way into the caudal on both lobes. Brown blotches near the tip
on both caudal lobes. Gold patch on the nape.
Other Asian tank mates such Rasboras, danios,
devario's and puntius species.
No reports of sexual
differences. Although it is believed that the females
are more rotund ventrically than the males when viewed
Live foods such as white worms, small
earthworms and aquatic insect larvae like bloodworms and similar
chironomids, should make up the majority of their weekly diet,
as Glyptothorax buchanani tends not to accept commercially
prepared feeds such as pellets and tablets; although they will
eat frozen food such as bloodworms.
With a carved breast-plate.
buchanani : This sp.
of Glyptothorax was named in honour of A. R. Buchanan,
of the Borneo Co.Ltd., who in 1935, made a small but valuable
collection of fishes from certain rivers of N.Thailand,
from which collections had not previously been made.
Adipose fin: Fleshy
finlike projection without rays, behind the rayed dorsal
Dorsal fin: The
primary rayed fin(s) on top of the body
Caudal fin: The
paired fins after head and before anal fin.
Ventral fin: The paired fins, between
the pectorals and the anal fins.
Caudal peduncle: The area between the
dorsal fin and the tail.
to the chest area.
Nonn Panitvong @