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Shiyan, N.A. 2025. New data on the morphology of the Maastrichtian pycnodonts (Gryphaeidae, Bivalvia) of Eastern Mangyshlak (Western Kazakhstan). Proceedings of Voronezh State University. Series: Geology. 2 (Jul. 2025), 22-31. DOI:https://doi.org/10.17308/geology/1609-0691/2025/2/22-31.