Oxynoemacheilus ercisianus (Erk'akan & Kuru, 1986)
Van loach
Oxynoemacheilus ercisianus
photo by Atici, A.A.

Family:  Nemacheilidae (Brook loaches)
Max. size:  7.7 cm TL (male/unsexed); max.weight: 4.5 g
Environment:  demersal; freshwater
Distribution:  Asia: Turkey.
Diagnosis:  This species is distinguished from its congeners in the O. tigris group by the following set characters, none of which are unique: male without suborbital groove; incomplete lateral line not reaching or reaching below the dorsal-fin base; scaleless on back and flank; with a median incision in the upper lip; individuals larger than 5.0 cm SL with a high dorsal adipose crest on the posterior-most caudal peduncle, the dorsal crest is not reaching to the vertical through the anal-fin base; pelvic-axillary lobe absent; deep caudal peduncle, its length 1.0–1.3 times its depth; flank with a marmorate pattern or with large, irregularly shaped and narrowly spaced dark-brown bars or blotches, usually more prominent on the flank behind the dorsal-fin base (Ref. 120397).
Biology: 
IUCN Red List Status: Endangered (EN); Date assessed: 09 January 2013 (B2ab(ii,iii)) Ref. (130435)
Threat to humans:  harmless


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