Classification / Names
Common names | Synonyms | Catalog of Fishes (gen., sp.) | ITIS | CoL | WoRMS | Cloffa
Actinopteri (ray-finned fishes) > Cypriniformes
(Carps) > Gastromyzontidae
Etymology: Gastromyzon: Greek, gaster = stomach + Greek, myzo = to suckle (Ref. 45335); russulus: Derived from the Latin russus, meaning red, in reference to the red fins in life.
Environment: milieu / climate zone / depth range / distribution range
Freshwater; demersal. Tropical
Asia: Kayan and Mahakam River basins in Kalimantan Timur, Indonesia.
Size / Weight / Age
Maturity: Lm ?  range ? - ? cm
Max length : 6.4 cm SL male/unsexed; (Ref. 57871)
Morphology | Morphometrics
soft rays: 5;
Vertebrae: 31 - 32. Can be distinguished from its congeners by possessing the following unique combination of characters: body plain dark brown or black in adults, body brown with numerous thin cream bars and blotches in juveniles; head dorsum dark brown with cream reticulate pattern; all fins reddish when alive; absence of secondary rostrum; absence of a postoral pouch; gill slit angular, subopercular groove present and continuous to pectoral fin origin; a rounded and elongate snout when viewed dorsally; presence of sublacrymal groove; abdomen without scales; lateral line with 64-71 scales; pelvic fin just touching anal fin origin, adpressed dorsal fin not overlapping level of anal fin origin (Ref. 57871).
Life cycle and mating behavior
Maturity | Reproduction | Spawning | Eggs | Fecundity | Larvae
Tan, H.H., 2006. The Borneo suckers. Revision of the torrent loaches of Borneo (Balitoridae): Gastromyzon, Neogastromyzon). Kota Kinabalu, Sabah, Malaysia : Natural History Publications (Borneo) in association with Raffles Museum of Biodiversity Research. vii, 245 p. : ill. (some col.), maps ; 26 cm. (Ref. 57871)
IUCN Red List Status (Ref. 123251)
CITES (Ref. 123416)
Threat to humans
Common namesSynonymsMetabolismPredatorsEcotoxicologyReproductionMaturitySpawningSpawning aggregationFecundityEggsEgg development
ReferencesAquacultureAquaculture profileStrainsGeneticsAllele frequenciesHeritabilityDiseasesProcessingMass 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=0.00447 (0.00172 - 0.01158), b=3.14 (2.91 - 3.37), in cm total length, based on LWR estimates for this (Sub)family-body shape (Ref. 93245
Trophic level (Ref. 69278
): 2.1 ±0.1 se; based on size and trophs of closest relatives
Vulnerability (Ref. 59153
): Low vulnerability (10 of 100) .