Abstract
A new study of the holotype of Riabininohadros weberae from the Upper Cretaceous (upper Maastrichtian) of Crimea (Besh-Kosh) reveals previously unknown fragments of femur, astragalus, and calcaneus. This taxon is characterized by a complex of primitive characters found in Iguanodontia and basal Ornithischia and its phylogenetic position can be defined as Styracosterna indet. The second dinosaur record from Crimea (Aleshino) is represented by a fragmentary skeleton, including cervical and dorsal vertebrae. It may belong to a derived iguanodontian or a primitive hadrosauroid. Thus, at least two species of dinosaurs coexisted in the Maastrichtian of Crimea.
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ACKNOWLEDGMENTS
The authors are grateful to D.V. Grigoriev for photographing the specimens and to Prof. G.D. Sues (National Museum of Natural History, Washington) for consultations.
Funding
This work was supported by the Russian Science Foundation (project number 19-14-00020). The work was partially supported by the federal grant to the Kazan Federal University supporting competitiveness among the world’s leading scientific and educational centers and by the Program of fundamental research of the Presidium of the Russian Academy of Sciences “Evolution of the Organic World: Role and Effect of Planetary Processes.”
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Translated by D. Ponomarenko
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Averianov, A.O., Lopatin, A.V. Dinosaur Fossils from the Upper Cretaceous of Crimea. Paleontol. J. 53, 398–410 (2019). https://doi.org/10.1134/S0031030119040026
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DOI: https://doi.org/10.1134/S0031030119040026