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Sadit Khan/Humaun Kabir Rahat (4)

Description: It can be distinguished from congeners by the unique combination of the following characters: supralabial fold extending posteriorly beyond vertical through posterior orbital margin; nearly circular eye; head length 17.6-19.6% SL; head depth 10.6-11.9% SL; dorsal-fin height 2.6-4.7% SL; 2 dorsal-fin rays; pectoral-fin length 11.8-14.0% SL; body depth at anus 14.4-16.7% SL; caudal peduncle depth 6.8-8.5% SL; 66-75 anal-fin rays; confluent anal and caudal fins separated by deep notch; 17 principal caudal-fin rays; and 57 vertebrae. The generic status of Pterocryptis taytayensis is discussed, with this species being reassigned to Ompok, (Ng HH, et al 2018). Habitat: Found in rock crevices and small caves of streams. Aquarium Care: In home aquaria, the colour changes from bright yellow to a more earthy, catfish-like colour. They must be housed with medium sized fish with lots of hiding places, (Sadit Khan/Humaun Kabir Rahat 2025). Sexual Differences: Unusually large genital papilla; males with a long conical papilla, while females with a flat, leaf-shaped papilla with a small projection at the tip. Colouration: In 70 % ethanol: Dorsal surface and sides of head uniformly brown flanks and thickened integument over anal fin pale brown, with faint mottled pattern. Ventral surfaces of head, breast and belly yellow with scattered melanophores; melanophores less dense ventral to level of eye. Maxillary and mandibular barbels brown, fading to yellow distally. Anal fin with hyaline ventral margin. Caudal, pectoral and pelvic fins with dusky fin rays and hyaline fin membrane. Colour in life similar, with a more yellowish tinge overall. Diet: They are predatory fish that feast on any living being that fits in their mouth. In terms of feeding, they will accept processed food, (Sadit Khan/Humaun Kabir Rahat 2025). Etymology: The specific name subrisa: Perfect passive participle of subrideo (L.), to smile, referring to its long supralabial fold, which vaguely resembles a smiling countenance. Remarks: This species was first recorded in Bangladesh by Tanvir Jubair the previous year, (Sadit Khan/Humaun Kabir Rahat 2025).

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Siluridae

South Asia: Kaladan River drainage, Mizoram, India. Type Locality: Maisa River in the vicinity of Maisa, Saiha District, Mizoram, India.

20-24°C (67-75°F)

6.0-7.0.

Ng HH, Lalramliana L, Lalronunga S. Pterocryptis subrisa, a new silurid catfish (Teleostei: Siluridae) from northeastern India. Zootaxa. 2018.
Sadit Khan/Humaun Kabir Rahat pers. comm. 2025.
The ETYFish Project Fish Name Etymology Database © Christopher Scharpf.