Actinopteri (ray-finned fishes) > Siluriformes
(Catfishes) > Siluridae
Etymology: Pterocryptis: Greek, pteron = wing, fin + Greek, kryptos = hidden (Ref. 45335). More on author: Valenciennes.
Environment: milieu / climate zone / depth range / distribution range
Freshwater; demersal; depth range - m (Ref. ), usually - m (Ref. ). Tropical; 0°C -
Asia: Nam Xam basin in Laos, Viet Nam, southeastern China (Ref. 43281) and Thailand (Ref. 9417).
Size / Weight / Age
Maturity: Lm ?  range ? - ? cm
Max length : 40.1 cm TL male/unsexed; (Ref. 111347); common length : 16.4 cm SL male/unsexed; (Ref. 35840); max. published weight: 430.00 g (Ref. 111347)
Morphology | Morphometrics
soft rays: 57 - 73;
Vertebrae: 53 - 58. 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. A unique combination of the following characters: head width 11.6-15.4% SL, head depth 8.2-9.9% SL, pelvic fin length 7.5-9.6% SL, length of dorsal fin base 0.8-1.9% SL, depth of caudal peduncle 6.2-7.6% SL, and principal caudal fin rays 14-16 (Ref. 41525). Dark brown body; dorsal surface purple; stomach light gray; all fins are light gray (Ref. 40516). Eye circular (Ref. 43281).
Adults inhabit streams. They feed actively at night on small fish, crustaceans and insects.
Life cycle and mating behavior
Maturity | Reproduction | Spawning | Eggs | Fecundity | Larvae
Kottelat, M., 2001. Fishes of Laos. WHT Publications Ltd., Colombo 5, Sri Lanka. 198 p. (Ref. 43281)
IUCN Red List Status (Ref. 124695)
Threat to humans
Common namesSynonymsMetabolismPredatorsEcotoxicologyReproductionMaturitySpawningSpawning aggregationFecundityEggsEgg development
ReferencesAquacultureAquaculture profileStrainsGeneticsAllele frequenciesHeritabilityDiseasesProcessingNutrientsMass conversion
Estimates based on models
Phylogenetic diversity index (Ref. 82805
= 0.5000 [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.00603 (0.00362 - 0.01003), b=3.00 (2.85 - 3.15), in cm total length, based on LWR estimates for this species & (Sub)family-body (Ref. 93245
Trophic level (Ref. 69278
): 3.8 ±0.59 se; based on food items.
Resilience (Ref. 120179
): Medium, minimum population doubling time 1.4 - 4.4 years (Preliminary K or Fecundity.).
Vulnerability (Ref. 59153
): Moderate vulnerability (37 of 100) .