Gastromyzon umbrus Tan, 2006
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Family:  Gastromyzontidae (Hillstream loaches)
Max. size:  5.07 cm SL (male/unsexed)
Environment:  demersal; freshwater
Distribution:  Asia: Northeastern Borneo in the Kalabakan and Sebuku River basins.
Diagnosis:  Dorsal soft rays (total): 8-8; Anal soft rays: 5-5; Vertebrae: 29-30. Can be distinguished from other species of the genus by possessing the following unique combination of characters: gill slit angular; subopercular groove present and continuous to pectoral fin origin; body dark brown; head dorsum dark brown; sublacrymal groove present; a rounded snout when viewed dorsally; secondary rostrum absent; post-oral pouch absent; abdomen without scales; lateral line scales 50-52; pelvic fin overlapping anal fin origin, adpressed dorsal fin overlapping level of anal fin origin (Ref. 57871).
IUCN Red List Status: Near Threatened (NT); Date assessed: 01 January 2019 (B1ab(i,ii,iii)) Ref. (124695)
Threat to humans:  harmless
Country info:   

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