Cottus koshewnikowi Gratzianov 1907

Artaev, Oleg & Ruchin, Alexander B., 2017, The ichthyofauna of the Moksha River, a tributary of the Volga river basin, Russia, Check List 13 (4), pp. 185-202 : 200

Cottus koshewnikowi Gratzianov 1907 , Volga Sculpin.

Cottus koshewnikowi Gratzianov 1907: 658 — Kottelat and Freyhof

2007: 511.

Cottus gobio — Reshetnikov et al. 2003b: 163, non C. gobio Linnaeus,

1758.

Material examined. Fig. 6D.

Presence of 1 lower jaw pore, and incomplete lateral line usually with 17–25 pores. This is the only species of the genus Cottus in the Volga river drainage. It is a rare species, inhabiting only rivers system. Five localities are known to the distribution of this species and are shown in Fig. 4 ( Artaev and Ruchin 2015), one of them ( Fig. 4, easternmost point) housing a stable population; the remaining cases represent solitary catches.