New Species of Crassatellidae (Bivalvia) from the Middle Eocene of Ukraine

Three new species of Crassatellidae: Crassatella ballista sp. nov., C. calva sp. nov., and Eucrassatella depulsoris sp. nov. from the Middle Eocene deposits of the western slope of the a quarry of the Ingulets Ore Mining and Processing Enterprise (Ingulets, Ukraine), which are correlated with the Lu...

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Bibliographic Details
Published in:Paleontological journal 2018-09, Vol.52 (5), p.481-490
Main Author: Berezovsky, A. A.
Format: Article
Language:English
Subjects:
Crassatella
Crassatellidae
Earth and Environmental Science
Earth Sciences
Eocene
New species
Paleontology
Physical characteristics
Quarries
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Summary:Three new species of Crassatellidae: Crassatella ballista sp. nov., C. calva sp. nov., and Eucrassatella depulsoris sp. nov. from the Middle Eocene deposits of the western slope of the a quarry of the Ingulets Ore Mining and Processing Enterprise (Ingulets, Ukraine), which are correlated with the Lutetian Stage, are described. The study of valves of Crassatella parisiensis Orbigny, 1852 from the Middle Eocene deposits of the Parisian Basin has shown that it differs from the species C. illustris Berezovsky, 2004, which was previously described as a subspecies of C. parisiensis. The study of variation of Crassatellidae provided substantiation of the species rank of C. artacosta Berezovsky, 2004, which was previously described as a subspecies of C. densicostata Berezovsky, 1998.
ISSN:0031-0301
1555-6174
DOI:10.1134/S0031030118050027