Alburnoides kosswigi

biology_ecology

Habitat. Fast-flowing streams and rivers with gravel and cobbled bottoms. Biology. No data.

Handbook of Freshwater Fishes of West Asia

diagnosis

Diagnosis. Distinguished from other species of Alburnoides in Mediterranean, Marmara, and Black Sea basins by: ○ body depth at dorsal origin usually greater than head length / ○ horizontal eye diameter smaller than interorbital distance / ○ ventral keel completely scaleless or covered by 1 − 3 scales / ○ snout slightly pointed / ○ mouth terminal, upper lip slightly projecting lower lip / ○ tip of mouth cleft situated at horizontal line with middle of eye or slightly below / ○ 40 − 55 + 2 − 3 lateral-line scales / ○ 4 pharyngeal teeth in long row on right 5 th ceratobranchial / ○ 11 − 14 ½, usually 12 − 13 ½, branched anal rays / ○ 5 − 7 gill rakers. Size up to 97 mm SL.

Handbook of Freshwater Fishes of West Asia

distribution

Distribution. Türkiye: Sakarya drainage and Lake Ilgın basin.

Handbook of Freshwater Fishes of West Asia

description

Alburnoides kosswigi is distinguished from A. manyasensis by having a scaleless keel between the posterior pelvic base and the anus, rarely with 1 - 3 scale covering the anterior part of the keel [Fig. 2 f] (vs. covered by (2) 3 – 5 scales [Fig. 2 d]) and a more slender caudal peduncle (9 – 11 % SL vs. 11 – 12). In A. kosswigi, the upper lip is slightly projecting beyond the lower lip in most specimens (vs. not projecting) and the interorbital distance is greater than eye diameter (vs. smaller than eye diameter). Alburnoides kosswigi is distinguished from A. kurui by having fewer gill rakers (5 – 7 vs. 7 – 9), fewer scale rows between the lateral-line and the anal-fin origin (3 – 5 vs. 5 – 7), fewer branched anal-fin rays (11 – 14 ½ vs. 13 – 15 ½), fewer total vertebrae (39 – 42 vs. 42 – 43) and fewer caudal vertebrae (19 – 21 vs. 21 – 22). In A. kosswigi, the eye diameter is greater than the snout length (vs. almost equal) and the body depth at the dorsal-fin origin is 0.9 – 1.0 times in the head length (vs. 0.8 – 0.9). Alburnoides kosswigi is distinguished from A. freyhofi by having a more slender body (body depth at dorsal-fin origin 0.9 – 1.0 times in head length vs. 0.8 – 0.9)

Three new species of Alburnoides from the southern Black Sea basin (Teleostei: Cyprinidae)