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Gastromyzon introrsus Tan, 2006 |
| Family: | Gastromyzontidae (Hillstream loaches) | |||
| Max. size: | 9.44 cm SL (male/unsexed) | |||
| Environment: | demersal; freshwater; pH range: 7.7 | |||
| Distribution: | Asia: Padas and Labuk River basins in Sabah, Malaysia. | |||
| Diagnosis: | Dorsal soft rays (total): 7-7; Anal soft rays: 4-4; Vertebrae: 30-33. Can be distinguished from its congeners by possessing the following unique combination of characters: distinct secondary rostrum present; complete post-oral pouch present; body brown with up to 12 cream bars, head dorsum brown with thin cream reticulate pattern; subopercular groove absent; gill slit vertical; sublacrymal groove present; a truncate snout when viewed dorsally; abdomen without scales; lateral line scales 60-68; pelvic fin not overlapping anal fin origin, adpressed dorsal fin not overlapping level of anal fin origin (Ref. 57871). | |||
| Biology: | Found in unshaded fast flowing river with a substratum of large rocks and gravel (Ref. 57871). | |||
| IUCN Red List Status: | Near Threatened (NT); Date assessed: 10 January 2019 (B1ab(iii)) Ref. (130435) | |||
| Threat to humans: | harmless | |||