Borogovia
| Borogovia | ||||||||||||
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Fossils of Borogovia gracilicrus |
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| Temporal occurrence | ||||||||||||
| Upper Cretaceous ( Campanium ) | ||||||||||||
| 83.6 to 72 million years | ||||||||||||
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| Systematics | ||||||||||||
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| Scientific name | ||||||||||||
| Borogovia | ||||||||||||
| Osmólska , 1987 | ||||||||||||
| Art | ||||||||||||
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Borogovia was a genus theropod dinosaur from the group of Troodontidae thatlived in what is now Mongoliaduring the Upper Cretaceous ( Campanium ). So far only parts of the hind limbs have been handed down in fossil form. The only species is Borogovia gracilicrus .
features
Borogovia , like all troodontids, was a small, two-legged, lightly built carnivore. Its length is estimated to be about two meters. While other troodontids wore an enlarged, curved "sickle claw" on the second toe, this claw was only weakly developed and straight in Borogovia . Another difference to other troodontids can be seen in the third toe of the foot, which was thinner and shorter than the fourth toe.
History of discovery and naming
The fossil was discovered in 1971 by a Polish-Mongolian expedition in the layers of the Nemegt Formation in the Mongolian Aimag Ömnö-Gobi . Six years earlier, the skeleton of the titanosaur Opisthocoelicaudia was recovered from the same site Altan Ula IV . Today the Borogovia material is in the collection of the Institute of Paleobiology of the Polish Academy of Sciences ( Polska Akademia Nauk ) in Warsaw .
The genus was scientifically described in 1987 by Halszka Osmólska . The name Borogovia refers to the "Borogove", a fantasy figure from Lewis Carroll's famous children's book Alice in Wonderland . The second part of the species name, gracilicrus ( lat. Gracilis - "slim", crus - "shin"), indicates the very slender shin (tibia) of this species.
Systematics
Barsbold and Osmólska (1990) suspect that the hind leg they found actually belonged to Saurornithoides , making Borogovia a synonym for the latter genus.
Individual evidence
- ^ A b Thomas R. Holtz Jr .: Supplementary Information. 2008. to: Thomas R. Holtz Jr .: Dinosaurs. The most complete, up-to-date Encyclopedia for Dinosaur Lovers of all ages. Random House, New York NY 2007, ISBN 978-0-375-82419-7 , online (PDF; 184.08 kB) .
- ^ A b Peter J. Makovicky , Mark A. Norell : Troodontidae. In: David B. Weishampel , Peter Dodson , Halszka Osmólska (eds.): The Dinosauria . 2nd edition. University of California Press, Berkeley CA et al. 2004, ISBN 0-520-06726-6 , pp. 184-195, here p. 192.
- ↑ Halszka Osmólska: Borogovia gracilicrus gen. Et sp. n., a new troodontid dinosaur from the Late Cretaceous of Mongolia. In: Acta Palaeontologica Polonica. Vol. 32, No. 1/2, 1987, ISSN 0567-7920 , pp. 133-150, digitized version (PDF; 72.47 kB) .
