Journal
PALAEONTOLOGISCHE ZEITSCHRIFT
Volume 83, Issue 2, Pages 227-245Publisher
SPRINGER HEIDELBERG
DOI: 10.1007/s12542-009-0017-5
Keywords
Hungarosaurus; Late Cretaceous; Iharkut; Skeletal reconstruction; Body mass estimation
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Funding
- Hungarian Natural History Museum
- National Geographic Society [7228-02, 7508-03]
- Jurassic Foundation
- Hungarian Scientific Research Fund [OTKA T38045]
- Hantken Foundation
- Hungarian Oil and Gas Company (MOL)
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Hungarosaurus tormai is a medium-sized nodosaurid ankylosaur that was described on the basis of four partial skeletons from the Santonian (Upper Cretaceous) of Hungary. In this paper, a new fifth skeleton and several isolated remains are described which greatly improve our knowledge of this primitive nodosaurid ankylosaur. Isolated cranial remains referred to juvenile individuals provide new information on the development of cranial ornamentation in nodosaurid ankylosaurs. Apart from both preserved mandibles with in situ dentition, the fifth partial skeleton contains several previously unknown limb elements (humerus, ulnae, radius) that indicate unusual limb proportions for Hungarosaurus compared with other ankylosaurs. On the basis of the five partial skeletons and the isolated remains, a skeletal and dermal armor reconstruction is attempted. Body mass calculations using three different methods yield an estimate of 650 kg for H. tormai.
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