Classification / Names
Common names | Synonyms | Catalog of Fishes (gen., sp.) | ITIS | CoL | WoRMS | Cloffa
Actinopterygii (ray-finned fishes) > Cypriniformes
(Carps) > Nemacheilidae
Etymology: Yunnanilus: From Yunnan, city on southwest China; pachycephalus: From pachy (Greek) which means thick, wide; and cephalus (Greek) which means head; alluding to the large swollen head of some specimens.. More on author: Kottelat.
Environment / Climate / Range
Freshwater; demersal. Subtropical, preferred ?
Asia: stream Weizhangho at Yangliu, Yunnan, China.
Size / Weight / Age
Maturity: Lm ?  range ? - ? cm
Max length : 8.3 cm SL male/unsexed; (Ref. 12040)
Morphology | Morphometrics
soft rays: 8. No lateral line; no head pores; 9 1/2 branched dorsal rays; 14 branched caudal rays; body depth 20-25% SL; dorsal head length 16-21% SL; color pattern usually consisting of large dark spots (Ref. 12040).
Inhabits torrential waters under rocks.
Life cycle and mating behavior
Maturity | Reproduction | Spawning | Eggs | Fecundity | Larvae
Kottelat, M. and X.L. Chu, 1988. Revision of Yunnanilus with description of a miniature species flock and six new species from China (Cypriniformes: Homalopteridae). Environ. Biol. Fish. 23(1/2):65-93. (Ref. 12040)
IUCN Red List Status (Ref. 109396)
CITES (Ref. 94142)
Threat to humans
Common namesSynonymsMetabolismPredatorsEcotoxicologyReproductionMaturitySpawningFecundityEggsEgg development
ReferencesAquacultureAquaculture profileStrainsGeneticsAllele frequenciesHeritabilityDiseasesProcessingMass conversion
Estimates of some properties based on models
Phylogenetic diversity index (Ref. 82805
= 0.5000 [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.00617 (0.00292 - 0.01304), b=3.03 (2.84 - 3.22), based on LWR estimates for this (Sub)family-body shape (Ref. 93245
Trophic Level (Ref. 69278
): 3.1 ±0.3 se; Based on size and trophs of closest relatives
Resilience (Ref. 69278
): High, minimum population doubling time less than 15 months (Preliminary K or Fecundity.).
Vulnerability (Ref. 59153
): Low vulnerability (22 of 100) .