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

Family:  Sisoridae (Sisorid catfishes), subfamily: Glyptosterninae
Max. size:  11.31 cm SL (male/unsexed)
Environment:  demersal; freshwater
Distribution:  Asia: upper reaches of the Ping River drainage, itself a tributary of the Chao Phraya River in northern Thailand.
Diagnosis:  Dorsal spines (total): 0-0; Dorsal soft rays (total): 6-7; Anal soft rays: 5-6; Vertebrae: 39-40. Belongs to the Oreoglanis siamensis species group as it possesses a distinct median notch on the posterior margin of the lower lip. Can be distinguished from other members of the genus in having a combination of the following characters: long nasal barbel reaching to anterior orbital margin, maxillary barbel with pointed tip, tip of pectoral fin not reaching pelvic-fin origin, caudal peduncle length 16.7-22.6 % SL, eye diameter 9.8-14.3 % HL, and an emarginate caudal fin (Ref. 83406). Description: Dorsal fin rays i,5 or i,6; anal fin rays iii,3,i, i,4 or i,5; pectoral fin rays i,17, i,18 , i,19 or i,20; pelvic fin rays i,5. 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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