Gobio holurus Fowler, 1976
Caspian gudgeon
Gobio holurus
photo by Naseka, A.M.

Family:  Gobionidae (Gudgeons)
Max. size:  10 cm SL (male/unsexed)
Environment:  benthopelagic; freshwater
Distribution:  Europe: Kuma, Terek, and Sulak drainages in western Caspian basin, Russia.
Diagnosis:  Diagnosed from other congeners in Black and Caspian Sea basins by having the following characters: barbel reaching to or beyond posterior eye margin; pectoral extending to or 1 scale in front of pelvic origin in mature males; breast scaled between pectorals, scales extending forward beyond pectoral base (at least in some individuals of any population); head length 26-28% SL; head depth 16-17% SL at nape, 48-62% HL at eye; body depth 22-23% SL; head width 15-17% SL, 58-62% HL; eye diameter 4-6% SL, 3.1-3.7 times in head depth, 1.4-1.5 times in interorbital distance (at 5-6 cm SL); caudal peduncle depth 33-36% HL (Ref. 59043).
Biology:  Found in a wide variety of habitats in small rivers and streams. Size reaches up to the about 10 cm SL (Ref. 59043).
IUCN Red List Status: Least Concern (LC); Date assessed: 01 January 2008 Ref. (124695)
Threat to humans:  harmless
Country info:   

Entered by: Torres, Armi G. - 26.10.09
Modified by: Torres, Armi G. - 22.03.10

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