Cerithium subdisjunctum

Harzhauser, Mathias, Guzhov, Aleksandr & Landau, Bernard, 2023, A revision and nomenclator of the Cainozoic mudwhelks (Mollusca: Caenogastropoda: Batillariidae, Potamididae) of the Paratethys Sea (Europe, Asia), Zootaxa 5272 (1), pp. 1-241 : 210

subdisjunctum . Cerithium . A.A. Ali-Zade & Kabakova in Ali-Zade, 1969

see Potamides caspius Andrussow, 1902

* Cerithium subdisjunctum A. Ali-Zade et Kabakova n. sp. —A.A. Ali-Zade 1969: 153, pl. 48, figs 3–4.

Type material. Holotype, illustrated in A.A. Ali-Zade (1969: pl. 48, fig. 3), SL: 15.0 mm, MD: 5.0 mm. Earth Science Museum at Moscow State University (The Museum of Natural History).

Type locality. Naftalan ( Azerbaijan) .

Stratigraphy. Late Pliocene/Pleistocene, Akchagylian.

Discussion. The type specimens have blunt axial ribs, subcylindrical whorls and lack spiral cords. This morphology is slightly reminiscent of a Theodisca species. The convex last whorl with the distinct, opisthocyrt growth lines, however, agree fully with Potamides caspius .

Eastern Paratethys. Akchagylian (Late Pliocene/Pleistocene): Caspian Basin: Naftalan ( Azerbaijan) ( Ali-Zade 1969).