Didacna trigonoides (Pallas, 1771)

*1771 Cardium trigonoides Pallas: 478.

1831 Cardium trigonoides (Pallas, 1771). - Eichwald: 282.

1838 Didacna trigonoides n. - Eichwald: 166-167.

1841 Didacna trigonoides . - Eichwald: 271-272, pl. 39, fig. 5 a–c .

1876 Cardium trigonoides, Pall. - Grimm: 138-140, pl. 6, fig. 2.

1914 Didacna trigonoides (Pallas, 1771). - Kalitskiy: pl. 3, figs 1, 2.

1914 Didacna trigonoides (Pallas, 1771). - Nalivkin and Anisimov: 6, pl. 1, fig. 3.

1932a Didacna trigonoides (Pallas, 1771). - Bogachev: pl. 1, figs 5, 6.

1932b Didacna trigonoides (Pallas, 1771). - Bogachev: 25, pl. 2, figs 1-9.

1933 Didacna trigonoides (Pallas, 1771). - Zhizhchenko: 35-36, pl. 2, figs 9, 10.

1950 Didacna trigonoides (Pallas, 1771). - Pravoslavlev: 21-22, figs 1-4.

1952 Didacna trigonoides (Pallas, 1771). - Zhadin: 346, fig. 319.

1953 Didacna trigonoides (Pallas, 1771). - Fedorov: 129, pl. 20, figs 7-9.

1969 Didacna trigonoides trigonoides (Pall.). - Logvinenko and Starobogatov: 323, fig. 343(1), pl. 5, fig. 7.

1969 Didacna trigonoides (Pallas, 1771). - Vekilov: 128-134, pl. 23, figs 1-9, pl. 27, fig. 6.

1973 Didacna trigonoides trigonoides Pallas, 1771. - Grossu: 129, text fig. 4, pl. 1, fig. 3.

1977 Didacna trigonoides tuzetae Tadjalli-Pour: 97, pl. 1, fig. 3.

1983 Didacna trigonoides (Pallas, 1771). - Popov: 204, pl. 16, fig. 19.

1986 Didacna trigonoides (Pallas, 1771). - Yakhimovich et al.: 79, pl. 10, fig. 1.

1988 Didacna trigonoides (Pallas, 1771). - Yanina and Svitoch: pl. 9, figs 7-12.

2005 Didacna trigonoides (Pallas, 1771). - Yanina: 244-245, pl. 14, figs 7-11.

2007 Didacna trigonoides (Pallas, 1771). - Nevesskaja: 941, pl. 24, figs 1-9.

2013 Didacna trigonoides (Pallas, 1771). - Kijashko in Bogutskaya et al.: 358, fig. 134.

2016 Didacna trigonoides (Pallas, 1771). - Vinarski and Kantor: 70.

Status. Pontocaspian species, endemic to Caspian Sea.

Type locality. Caspian Sea, a neotype has been designated based on a specimen from Chechen Island by Nevesskaja (2007, pl. 24, fig. 4).

Distribution. Caspian Sea, mostly eastern part of northern Caspian Sea Basin (Logvinenko and Starobogatov 1969). Furthermore found in living position in Novocaspian deposits near Turali, Dagestan (western part middle basin; FW).

Remark. Genetic data are available through Albrecht et al. (2014).

Conservation status. Not assessed.