TERRESTRIAL MOLLUSKS OF NEOGENIC DEPOSITS Of UKRAINE

• Date: 2020
• Main Author: Prysyazhnyuk, V.A.
• Format: Article
• Language: Ukrainian
• Published: Institute of Geological Sciences, NAS of Ukraine 2020
• Subjects: terrestrial molluscs; Neogene; Ukraine
• Online Access: http://geojournal.igs-nas.org.ua/article/view/204345
• Journal Title: Geological journal

For the first time, we present the most complete list of the terrestrial mollusks from Neogenic deposits of Ukraine (more than 166 species that belong to 43 genera from 30 families). In the future, after the completion of a revision, this list will be significantly supplemented. By the systematic composition and considering the age-related, ecological, and zoogeographical memberships the mollusks are grouped into definite complexes that correspond to complex zones. A total of 20 complexes are distinguished. In the Neogene of Volyn-Podillya and the northern part of Moldova the Ottnang-Carpathian Stage corresponds to the Monastyrysskyi complex; the Badenian Stage — to the Rudkovetskyi complex; the Early Kuzhorskyi (Early Volyn) Stage — to the Kuzhorskyi (Zalisskyi) complex; the Late Kuzhorskyi (Late Volyn) Stage — to the Zbrutskyi complex; the beginning of the Middle Sarmatian Stage — to the Goyansko-Gidigichskyi complex (known only in Moldova); the medium of the Middle Sarmatian Stage — to the Moldavskyi complex in Moldova and Chaplynskyi complex in Volyn-Podillya.The complexes of the Ukraine’s south belong to two paleozoogeographical regions: the West region (to the East of Dnieper and South Bug rivers) and the East region. The differences between them are determined, first of all, by the number of migrants from the West or East. The Karagan Stage corresponds to the Menchykurskyi complex I, the Konka Stage — to the Menchykurskyi complex II, the upper part of the Early Sarmatian Stage — to the Bohdanovskyi complex, the terminal Middle Sarmatian — to the Mykhaylivskyi complex, and the Late Sarmatian Stage — to the Lohaneshts kyi complex. The mollusks of the Bereznehuvatskyi complex are characteristic of the land that was in the Ukraine’s South in the period between the Sarmatian and Meotian Stages. On the South-West of Ukraine, the end of the Meotian Stage corresponds to the Horikhivskyi complex, the middle of the Pontian Stage — to the Vynohradivskyi complex. By all parameters, the Molochanskyi complex belongs to the Late Pliocene, and the Shyrokinskyi complex belongs to the Eopleistocene.Only two complexes can be well distinguished in Crimea, despite the sufficiently large number of occurences of terrestrial mollusks: the Early Meotian complex of the Babchykska ravine and the Late Meotian complex of the Zavitne site. Both complexes are endemic, and only the individual occurences can indicate the short-term connections of the Crimean land with the Ciscaucasia and Dobrogea regions. The majority of localities of terrestrial mollusks (54 localities and individual occurences) are shown and their memberships to various stratigraphic divisions of the Neogene are substantiated.