Cottus nasalis Berg, 1933

Sideleva, Valentina G. & Zhidkov, Zakhar V., 2021, An annotated type catalogue of freshwater sculpins (Cottoidei) described by Lev Berg, Zootaxa 5016 (2), pp. 229-242 : 238

Cottus nasalis Berg, 1933

( Fig. 10 )

Holotype: ZIN 2074 , Turkestan , Fergana, Syrdarya River basin, collector V. K. Tagantsev.

Current status: Synonym of Cottus jaxartensis Berg, 1916 (Fishes of Kazakhstan, 1989; Sideleva, 2021).

Counts: D1 8, D2 18, А 13, Р 14, C 25, vert. 32 (abdominal 11, caudal 21), two-pairs of pleural ribs.

Diagnosis: bony outgrowths under pectoral fin; anterior nostrils in form of clearly visible thick-walled tubes, posterior nostrils in form of short tubes; pelvic fin long, reaching vertical to 3-rd ray of second dorsal fin.

Proportional measurements as percentages of standard length (51.5 mm): predorsal length 28.9, preanal length 46.8, maximum body depth 12.0, length of caudal peduncle 8.3, depth of caudal peduncle 8.5, length of first dorsal-fin base 16.7, length of second dorsal-fin base 35.3, length of longest anal-fin base 25.2, length of longest first dorsal-fin ray 11.4, length of longest second dorsal-fin ray 12.8, length of longest anal-fin ray 15.3, pectoral-fin length 31.3, pelvic-fin length 20.8, head length 35.3, postorbital length 17.4, head depth 11.8, head width 23.2, eye horizontal diameter 6.3, snout length 8.9, interorbital width 7.0, upper jaw length 14.7, interbranchial width 14.7, length of gill slit 15.5.

Figures

FIGURE 10. Cottus nasalis Berg, 1933 ZIN 2074, holotype, photo (A) and radiograph (B).