Emausaurus
| Emausaurus | ||||||||||||
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Skull of Emausaurus |
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| Temporal occurrence | ||||||||||||
| Lower Jurassic ( Toarcium ) | ||||||||||||
| 182.7 to 174.1 million years | ||||||||||||
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| Systematics | ||||||||||||
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| Scientific name | ||||||||||||
| Emausaurus | ||||||||||||
| Haubold , 1990 | ||||||||||||
| Art | ||||||||||||
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Emausaurus is a primitive genus of the bird pelvic dinosaur that lived in the Lower Jura and whose remains were found in the German state of Mecklenburg-Western Pomerania .
features
The length of Emausaurus is estimated to be around 1 to 2 meters, but it is difficult to say because apart from the skull only a few bones were found. The skull had small, leaf-shaped teeth that resembled those of the stegosauria and were adapted to a plant food. His body was covered with bone scales, both small conical and larger, spiky scales were found, the arrangement of which is unknown. Presumably Emausaurus moved like the related Scelidosaurus on all fours ( quadruped ).
Discovery and naming
Fossils of emausaurus were 1963 in a clay pit near Grimmen discovered in Mecklenburg-Vorpommern by the Geology graduate Werner Ernst and 1990 by Hartmut Haubold (Hall) first described . The name is derived from the acronym of the Ernst Moritz Arndt University ("EMAU"); Type species is Emausaurus ernsti . The finds are dated to the Lower Jurassic ( Toarcian ), to an age of around 180 million years. The not yet fully grown specimen was deposited in the sea, where the carcass was probably transported over a greater distance by currents.
Systematics
Emausaurus is a primitive (basal) representative of the Thyreophora bird pelvic dinosaur group , which also includes the stegosauria and the ankylosauria . Phylogenetic studies place it at the base of the Thyreophora and thus outside of the Stego- and Ankylosauria; according to other opinions he is already an early representative of the stegosauria.
literature
- David E. Fastovsky , David B. Weishampel : The Evolution an Extinction of the Dinosaurs. 2nd edition. Cambridge University Press, Cambridge et al. 2005, ISBN 0-521-81172-4 .
- Hartmut Haubold : A new dinosaur (Ornithischia, Thyreophora) from the Lower Jura of northern Central Europe. In: Revue de Paléobiologie. Vol. 9, 1990, ISSN 0253-6730 , pp. 149-177.
- Ernst Probst , Raymund Windolf: Dinosaurs in Germany. Bertelsmann, Munich 1993, ISBN 3-570-02314-1 , p. 135 ff.
- 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 .
- Sebastian Stumpf, Stefan Meng: Dinosaurs from Northeast Germany. In: Biology in Our Time. Vol. 43, No. 6, 2013, ISSN 0045-205X , pp. 362-368, doi : 10.1002 / biuz.201310521 .