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TABLE 1. Distribution of the mollusc species in the Miocene deposits of the Morskaya 2 site.

    Miocene
    Sarmatian marine conditions Maeotian lake-lagoon conditions
Taxa Layer 1 Layer 2 Layer 3
1. Blinia cf. angulata (d’Orbigny, 1844)     1
2. Gibbula (Sarmatigibbula) podolica (Du Bois de Montpéreux, 1831) 47   8
3. G. (Gibbula) pseudoangulata (Sinzov, 1875) 2   1
4. Gibbula sp.     70
5. Barbotella intermedia (Radovanović et Pavlović, 1893)     6
6. Hydrobia elongata Eichwald, 1830 78   1
7. Pseudamnicola nympha (Eichwald, 1850) 6   1
8. Dorsanum ignobile (Kolesnikov, 1932) 5    
9. D. duplicata opinabile (Kolesnikov, 1932) 34    
10. D. corbiana (d’Orbigny, 1844)   7  
11. Dorsanum sp.     1
12. Acteocina lajonkaireana (Basterot, 1825) 12   46
13 A. okeni (Eichwald, 1850) 3    
14. Retusa melitopolitana (Sokolov, 1899) 77   1
15. Viviparus cf. maeoticus (Bogachev and Shishkina, 1919)     692
16. V. cf. karaganicus Volkova, 1939     12
17. Bithyniidae indet. (operculum)     78
18. Lithoglyphus acutus Cobălcescu, 1883     1410
19. Borysthenia cf. pronaticina (Lindholm, 1932)     3
20. Lymnaea sp.     1
21. Planorbarius sp.     1
22. Anisus cf. spirorbis (Linnaeus, 1758)     3
23. Gyraulus cf. acronicus (Férrussac, 1807)     94
24. Gyraulus sp.     1
25. Helicodiscus (Helicodiscus) roemeri (Andreae, 1902)     9
26. Vallonia cf. pulchella (Müller, 1774)     1
27. Vertigo sp.     1
28. ? Deroceras sp. (Agriolimacidae)     344
29. Sphaerium cf. rivicola Lamarck, 1818     4 (4r+4l)
30. Pisidium sp.     4 juv. (3r+4l)
31. Polititapes ponderosa (d’Orbigny, 1844) 12 (12l+2r)    
32. P. vitaliana, (d’Orbigny, 1844) 49 (38l +49r)    
33. Veneridae indet.     18 (16r+18l)
34. Sarmatimactra fabreana (d’Orbigny, 1844) 3 (3l+2r)   1 (1r+1l)
35. Ervilia dissita dissita (Eichwald, 1830) 13 (10l+13r)    
36. Obsoletiforma obsoleta ingrata (= Cerastoderma) (Kolesnikov, 1929) 11 (10l+11r)    
37. O. obsoleta obsoleta (Eichwald, 1830) 12 (8l+12r)    
38. Obsoletiforma sp.     22
39. Plicatiforma fittoni fittoni (d’Orbigny in Murchison et al., 1845) 15 (11l+15r)   17 (5r+17l)
40. Cardiidae indet.     48

l - left valve; r - right valve; juv. - juvenile

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