Actinopteri (ray-finned fishes) > Cypriniformes
(Carps) > Nemacheilidae
Etymology: Schistura: Greek, schizein = to divide + Greek, oura = tail; an allusion to forked caudal fins (Ref. 45335); macrocephalus: From the Greek makros (large) and kephale (head). More on author: Kottelat.
Environment: milieu / climate zone / depth range / distribution range
Freshwater; benthopelagic. Tropical
Asia: Nam Youan basin in Laos and Mengla River in China.
Size / Weight / Age
Maturity: Lm ?  range ? - ? cm
Max length : 8.4 cm SL male/unsexed; (Ref. 36949)
Morphology | Morphometrics
Head with massive appearance, lateral length 3.4-3.8 times in SL; anterior nostril pierced on front side of a flap; processus dentiformis present; no median notch in upper lip, lower lip interrupted medially; dorsal keel on caudal peduncle; lateral line complete; anus about 1-2 eye diameters in front of anal-fin origin; 8.5 branched dorsal-fin rays; 5.5 branched anal-fin rays; caudal fin emarginate, with 9+8 branched rays; axillary pelvic lobe reduced or missing; top of head with a few large spots; body with 6-9 brown bars, wider than or as wide as interspaces, wider anteriorly than posteriorly; along lateral line, a series of faint blackish blotches more or less corresponding and superimposed to bars; black bar of caudal-fin base either almost complete or, often, dissociated into two blotches, a slightly oblique one along base of upper rays and a vertical and somewhat longer one on lower two-thirds of fin base (Ref. 36949).
Life cycle and mating behavior
Maturity | Reproduction | Spawning | Eggs | Fecundity | Larvae
Kottelat, M., 2000. Diagnosis of a new genus and 64 new species of fishes from Laos (Teleostei: Cyprinidae, Balitoridae, Bagridae, Syngnathidae, Chaudhuriidae and Tetraodontidae). J. South Asian Nat. Hist. 5(1):37-82. (Ref. 36949)
IUCN Red List Status (Ref. 123251)
CITES (Ref. 123416)
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=0.00631 (0.00268 - 0.01487), b=3.02 (2.85 - 3.19), in cm total length, based on LWR estimates for this Genus-body shape (Ref. 93245
Trophic level (Ref. 69278
): 3.0 ±0.3 se; based on size and trophs of closest relatives
Resilience (Ref. 120179
): High, minimum population doubling time less than 15 months (Preliminary K or Fecundity.).
Vulnerability (Ref. 59153
): Low vulnerability (22 of 100) .