S armatigibbula tschokrakensis (Andrussov, 1911) †

= Trochus tschokrakensis var. extensus Zhizhchenko, 1936 (non Trochus extensus Sowerby, 1821)

= Trochus tschokrakensis var. planatus Zhizhchenko, 1936

= Trochus tschokrakensis var. tarchanensis Kolesnikow, 1931

Middle Miocene (Chokrakian): Eastern Paratethys (Russia).

(Iljina 1993)