Monodacna caspia

Wesselingh, Frank, Poorten, Jan Johan ter, Kijashko, Pavel, Albrecht, Christian, Anistratenko, Olga Yu, Frolov, Pavel, Gándara, Alberto Martinez, Gittenberger, Arjan, Gogaladze, Aleksandre, Mikhail Karpinsky, Popa, Luis, Sands, Arthur F, Vandendorpe, Justine & Wilke, Thomas, 2019, Mollusc species from the Pontocaspian region - an expert opinion list, ZooKeys 827, pp. 31-124 : 49-50

Monodacna caspia (Eichwald, 1829)

*1829 C.[orbula] caspia Eichwald: 281, pl. 5, fig. 6a, b.

1841 Monodacna caspia . - Eichwald: 274, pl. 39, fig. 4 a–c.

1905 Monodacna caspia (Eichwald, 1829). - Ostroumov: pl. 3, fig. C.

1932a Monodacna caspia (Eichwald, 1829). - Bogachev: pl. 1, figs 10, 13.

1932b Monodacna caspia (Eichwald, 1829). - Bogachev: 30, pl. 3, figs 21-27.

1952 Monodacna edentula (Pallas, 1771) var. caspia Eichwald, 1841. - Zhadin: 350, fig. 327B.

1958 Monodacna caspia (Eichwald), 1829. - Nevesskaja: 44-46, pl. 9, figs 1-8.

1963 Monodacna caspia caspia (Eichwald, 1829). - Nevesskaja: 66, pl. 8, figs 1-4.

1965 Monodacna caspia caspia (Eichwald). - Nevesskaja: 187-198, pl. 9, figs 6-15, 17-19, 23-26, 29.

1969 Monodacna caspia (Eichwald, 1829). - Vekilov: 147-150, pl. 31, figs 9-11.

1973 Hypanis caspia caspia Eichwald, 1829. - Grossu: 139, text fig. 19B.

1977 Hypanis caspia assalae Tadjalli-Pour: 99, pl. 1, fig. 4.

1977 Hypanis caspia nahali Tadjalli-Pour: 99, pl. 1, fig. 6.

2013 Adacna (Monodacna) caspia caspia (Eichwald, 1829). - Kijashko in Bogutskaya et al.: 380, fig. 154.

2016 Adacna (Monodacna) caspia caspia (Eichwald, 1829). - Vinarski and Kantor: 67.

Status. Pontocaspian species, endemic to Caspian Sea.

Type locality. "Caspium mare" [Caspian Sea].

Distribution. Caspian Sea.

Taxonomic notes. The Monodacna caspia group ( M. caspia , M. filatovae , and M. knipowitschi ) comprises three (sub-) species that all share the relatively convex and rounded shell and well-defined ribbing. These species have been described from different areas and habitats in the Caspian Sea and have been morphologically characterised by Kijashko in Bogutskaya et al. (2013). However, neither morphological analyses of intermediate populations nor genetic analyses have been performed to clarify if the three taxa are distinct or ecomorphs of a single species. We are therefore uncertain whether M. filatovae and M. knipowitschi should be maintained.

Conservation status. Not assessed.