Oreoglanis colurus Vidthayanon, Saenjundaeng & Ng, 2009
photo by Vidthayanon, C.

Family:  Sisoridae (Sisorid catfishes), subfamily: Glyptosterninae
Max. size:  6.18 cm SL (male/unsexed)
Environment:  demersal; freshwater
Distribution:  Asia: upper reaches of the Nan River drainage, itself a tributary of the Chao Phraya River in northern Thailand.
Diagnosis:  Dorsal spines (total): 0-0; Dorsal soft rays (total): 7-7; Anal soft rays: 5-5; Vertebrae: 35-36. Belongs to the Oreoglanis delacouri species group which lacks a distinct median notch on the posterior margin of the lower lip. Can be distinguished from other members of the genus by the following combination characters: maxillary barbel with pointed tip, dentary tooth patches separated by approximately one-quarter their width, tip of pectoral fin in contact with pelvic-fin origin, caudal peduncle length 13.0-15.0 % SL, caudal peduncle depth 5.2-6.6 % SL, caudal peduncle depth 2.15-2.86 times in its length, and a lunate caudal fin with upper and lower first principal rays of approximately equal length (Ref. 83406). Description: Dorsal fin rays i,5,i or i,6; anal fin rays i,4; pectoral fin rays i,18 or i,19; pelvic fin rays i,5. Caudal fin lunate. Paired fins greatly enlarged, forming ovoid adhesive disc with body (Ref. 83406).
Biology:  Occurs in rocky, fast-flowing streams (Ref. 83406).
IUCN Red List Status: Data deficient (DD); Date assessed: 19 January 2011 Ref. (130435)
Threat to humans:  harmless


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