Tsagantegia
| Tsagantegia | ||||||||||||
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| Temporal occurrence | ||||||||||||
| Upper Cretaceous ( Santonium ) | ||||||||||||
| 86.3 to 83.6 million years | ||||||||||||
| Locations | ||||||||||||
| Systematics | ||||||||||||
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| Scientific name | ||||||||||||
| Tsagantegia | ||||||||||||
| Tumanova , 1993 | ||||||||||||
| Art | ||||||||||||
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Tsagantegia was a genus of pelvic dinosaurs from the group of Ankylosauria that lived in the Middle Upper Cretaceous in East Asia.
features
From tsagantegia only has thus far Skull found, the 30 centimeters long and was indicative of a medium-sized Ankylosaurier. In contrast to other representatives of the Ankylosauridae, the armor of the head is not a mosaic of polygons, but rather shapeless and the bumps on the cheek and back of the head are only weakly pronounced. Nothing is known of the rest of the body structure. Like all ankylosaurs, it was probably a quadruple dinosaur covered by bone scales that ate plants.
Discovery and naming
The fossil remains of Tsagantegia were discovered in the 1990s in the Dorno-Gobi-Aimag region in southeastern Mongolia and named after the site of Tsagan-Teg ("white mountains"). The only species and thus type species is T. longicranialis . The finds are dated to the Middle Upper Cretaceous ( Santonium ) between 86 and 83 million years ago.
Systematics
Tsagantegia is classified within the Ankylosauridae in the Ankylosaurinae, the more highly developed Ankylosauridae that first appeared in the Upper Cretaceous. Phylogenetically , it is considered a sister group of all other Ankylosaurinae (see also systematics of the Ankylosauridae ).
literature
- Matthew K. Vickaryous, Teresa Maryańska , David B. Weishampel : Ankylosauria. In: David B. Weishampel, Peter Dodson , Halszka Osmólska (eds.): The Dinosauria . 2nd edition. University of California Press, Berkeley CA et al. 2004, ISBN 0-520-24209-2 , pp. 363-392.
Individual evidence
- ^ Gregory S. Paul : The Princeton Field Guide To Dinosaurs. Princeton University Press, Princeton NJ et al. 2010, ISBN 978-0-691-13720-9 , p. 231, online .