Gastromyzon viriosus Tan, 2006
Gastromyzon viriosus
photo by JJPhoto

Family:  Gastromyzontidae (Hillstream loaches)
Max. size:  5.37 cm SL (male/unsexed)
Environment:  demersal; freshwater
Distribution:  Asia: Tatau River basin in Sarawak, Malaysia.
Diagnosis:  Dorsal soft rays (total): 9-9; Anal soft rays: 6-6; Vertebrae: 30-32. Can be distinguished from its congeners by possessing the following unique combination of characters: body dark brown with 8-10 cream bars, side with bars complete; head dorsum dark brown with thin cream reticulate pattern; absence of secondary rostrum; absence of a postoral pouch; gill slit angular, subopercular groove present and continuous to pectoral fin origin; a rounded snout when viewed dorsally; presence of sublacrymal groove; abdomen without scales; lateral line with 63-67 scales; pelvic fin not overlapping anal fin origin, adpressed dorsal fin not overlapping level of anal fin origin (Ref. 57871).
Biology:  Inhabits fast flowing rocky streams (Ref. 84801).
IUCN Red List Status: Near Threatened (NT); Date assessed: 11 January 2019 (B1ab(iii)) Ref. (124695)
Threat to humans:  harmless
Country info:   

Entered by: Torres, Armi G. - 07.02.07
Modified by: Bailly, Nicolas - 14.08.19

Source and more info: For personal, classroom, and other internal use only. Not for publication.

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