Cerastoderma glaucum

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 : 38

Cerastoderma glaucum ( Bruguière, 1789) s.l.

*1789 Cardium glaucum Bruguière: 221-222.

1789 Cardium Glaucum Poiret: 13-15.

1869 Cardium isthmicus Issel: 74-76.

1952 Cardium edule L., 1758. - Zhadin: 344-345, fig. 318 [non Cardium edule Linnaeus, 1758].

2003 Cerastoderma isthmicum (Issel, 1869). - Andreeva & Andreev: 54, 62, figs 6.1(b), 6.7.

2013 Cerastoderma glaucum (Poiret, 1789). - Kijashko in Bogutskaya et al.: 342, fig. 126, photo 39.

2016 Cerastoderma glaucum ( Bruguière, 1789). - Vinarski and Kantor: 69.

2016 Cerastoderma isthmicus (Issel, 1869). - Vinarski and Kantor: 70.

Status. Native Pontocaspian species (Black Sea Basin), Holocene invasive in Caspian Sea and Aral Sea.

Type locality. French Mediterranean.

Distribution. NE Atlantic, Baltic Sea, Mediterranean, Black Sea Basin, Caspian Sea Basin, Aral Sea, isolated Saharan lakes ( Plaziat 1991).

Taxonomic notes. DNA studies have shown a strong structuring between Atlantic–western Mediterranean, Ionian, and Aegean-Pontocaspian populations of C. glaucum ( Nikula and Väinölä 2003, Sromek et al. 2016). According to Sromek et al. (2016: 515), the "strong genetic differentiation and the occurrence of private alleles may hint at the presence of cryptic species within C. glaucum ". For a discussion on the authority of C. glaucum , see Vinarski and Kantor (2016: 69-70).

Remarks. The arrival of Cerastoderma glaucum in the Caspian Sea circa 8000 years ago has been linked to human settlement expansion through the Manych corridor ( Fedorov 1957, Yanina 2009). It would be among the earliest human-mediated dispersal events for invertebrate species known to date.

Conservation status. Not assessed.