PlanetCatfish.com - Batasio convexirostrum (Bagridae) Cat-eLog

Collected From Khawchhak Tuipui ,Kolodyne Basin, Mizoram
Kolodyne Basin, Mizoram, India

Cat-eLog Data Sheet
Scientific Name	**Batasio convexirostrum** Darshan, Anganthoibi & Vishwanath, 2011
Common Name
Type Locality	Mat River, tributary of Koladyne River, near Mat bridge, 22°54'N, 92°52'E, Lunglei District, Mizora state, India.
Pronunciation	bah tah see oh - con vex ee rost rum
Etymology	The genus name comes from the local (Bengali) name of the fish (batasio or batashi). The specific name is derived from the Latin convexus, meaning rounded/curving out; and rostrum, meaning snout: formed as an adjective.
Species Information
Identification	The bagrid genus Batasio Blyth comprises of small, laterally compressed catfishes distributed in South and Southeast Asia, diagnosed from its confamilials in having large sensory pores on the head, a narrow mental region, a pair of posteriorly-directed processes on the anterior part of vomer, a transversely-elongated bar-like entopterygoid, and the metapterygoid in close contact with the quadrate but free from the hyomandibular (Mo, 1991). Batasio convexirostrum is distinguished from its congeners (except B. dayi, B. elongatusand B.procerus) in having a head and body coloration consisting of only a dark-brown vertical predorsal bar (vs. predorsal bar absent altogether, or if present, in combination with either a mid-lateral stripe, a dark-brown spot, or a series of vertical bars posteriorly) against a lighter-brown body. It differs from B. dayi in having a longer snout (length:39.2–45.5% HL vs. 35.5–38.7% HL), a greater number of pectoral-fin rays (9–10 vs. 8) and vertebrae (39–40 vs.36–38), and the dorsal fin dark grey at base and distal one-third, hyaline in between (vs. black, hyaline close to its base); and from both B. procerus and B. elongatus in having a shorter dorsal-to-adipose distance (1.7–4.1% SL vs.4.4–14.2), and fewer gill rakers on the first branchial arch (4–5 vs. 9–27). Batasio convexirostrum further differs from B. procerus in having a greater eye diameter (24.6–29.8 vs. 17.2–22.6% HL), a deeper head (19.6–21.7% SL vs. 16.8–18.6), a longer snout (39.2–45.5% HL vs. 33.8–38.3) and a longer pectoral-spine (14.6–17.6% SL vs. 8.9–13.2), a greater number of pectoral-fin rays (9–10 vs. 7–8), and fewer vertebrae (39–40 vs. 41–43); and from B.elongatus in having a deeper body (20.2–21.6% SL vs. 15.8–19.3) and a greater number of vertebrae (39–40 vs.36–38).
Sexing	Not known.
General Remarks	Not exported for the trade as yet.
Habitat Information
Distribution	The species is presently known only from the Koladyne River and the Mat River (a tributary of the former) in Mizoram State, India. Indian waters, North Eastern India Waters, Kaladan (click on these areas to find other species found there) African Waters, Angola Waters, Mat (click on these areas to find other species found there) Login to view the map.
IUCN Red List Category	Not Evaluated
Temperature	20.0-25.0°C or 68-77°F (Show species within this range)
Other Parameters	The water should be cool and heavily oxygenated with a good flow as these fish occur in hill streams.Anything above 25 C will hamper long term survival as these fish tend to burn away at higher temperatures.
Husbandry Information
Feeding	Is known to take processed food but prefers live food like blood worms, frozen brine shrimp etc. Needs sometime to gradually get weaned off live foods. Spot feeding will help in case tank mates are voracious feeders. User data.
Furniture	Fine sand for the bottom and smooth pebbles / rocks. Cover / hiding spots can be created with either plants or wood.
Compatibility	A peaceful species suitable for a hillstream biotope.
Suggested Tankmates	Peaceful Cyprinids like Puntius and Balitorine loaches like Schistura or Nemacheilus species.
Breeding	Unreported in the aquarium.
Breeding Reports	There is no breeding report.
Further Information
Reference	Zootaxa No. 2901, pp 53, Figs. 1-2.
Registered Keepers	There is no registered keeper.
Wishlists	Love this species? Click the heart to add it to your wish list. There is no wish to keep this species.
Spotters	Spotted this species somewhere? Click the binoculars! There is but a single record of this fish being seen, view it.
Forum BBCode

	Search for B. convexirostrum
	Look up B. convexirostrum on AquaticRepublic.com
	Look up B. convexirostrum on Fishbase
	Look up B. convexirostrum on Encyclopedia of Life
	Look up B. convexirostrum on Global Biodiversity Information Facility
	LFS label creator ARN ref:1.8.222.3710
Last Update	2025 Jan 01 11:55 (species record created: 2011 May 31 14:10)