Abstract
The structure of caudal neural spines of protoceratopoids displays adaptation for aquatic and terrestrial mode of life. The increasing height of caudal neural spines in the series Leptoceratops, Udanoceratops, Protoceratops, Bagaceratops is connected with the extent of adaptation for swimming and changes in inclination of neural spines are connected with the mechanical balance of the lever. Thus, the anterior caudal vertebrae (1cd–15cd) of Protoceratops and Bagaceratops show an anticliny, which promotes extension (rise) of a heavy tail in terrestrial conditions. In the middle part of the tail (16cd–23cd), with the greatest height of neural spines, a decrease in width and increase in thickness counteract transverse loads accompanying movements on land. At the same time, the supraspinal ligament prevents divergence of neural spines caused by curvature of the tail as it is raised above the ground.
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Original Russian Text © V.S. Tereschenko, T. Singer, 2013, published in Paleontologicheskii Zhurnal, 2013, No. 6, pp. 59–72.
Article is dedicated to memory of the great paleontologist, dinosaur specialist, professor of the Institute of Paleobiology of the Polish Academy of Sciences Halszka Osmólska
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Tereschenko, V.S., Singer, T. Structural features of neural spines of the caudal vertebrae of protoceratopoids (Ornithischia: Neoceratopsia). Paleontol. J. 47, 618–630 (2013). https://doi.org/10.1134/S0031030113060105
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DOI: https://doi.org/10.1134/S0031030113060105