Английская Википедия:Genusaurus
Шаблон:Short description Шаблон:Speciesbox
Genusaurus (Шаблон:IPAc-en Шаблон:Respell;[1] meaning "knee lizard") is a genus of abelisauroid dinosaur from the Early Cretaceous. Its fossils were found in France. Genusaurus is believed to have lived during the Albian stage, around 112-100 million years ago.[2][3]
Description
Genusaurus possesses several distinguishing traits. The dorsal vertebrae are elongated. The elements of the pelvis are strongly fused. The thighbone shows a low bone plateau below the major trochanter; to the front an accessory trochanter is present. The epicondyle of the inner femoral condyle is well-developed. The cnemial crest strongly extends to the front and is curved upwards. The fibula has a distinctive boss serving as an attachment for the Musculus iliofibularis. The upper inner side of the fibula is strongly hollowed out.[4]
Size
Genusaurus was originally estimated to have been Шаблон:Convert long. From the Шаблон:Convert thighbone, a weight of Шаблон:Convert was extrapolated.[4] Later estimates, while confirming the length of Шаблон:Convert,[2] have reduced the weight to Шаблон:Convert,[5] or even Шаблон:Convert.[6] In 2016, its length was estimated at Шаблон:Convert, making it the smallest abelisaurid.[7]
Discovery and naming
The type species, Genusaurus sisteronis, is the only named species. It is based on a partial skeleton found in 1984-1986 in the Albian Bevons Beds, holotype MNHN Bev.1. The holotype contains seven partial dorsal vertebrae, a piece of a sacral, a piece of an ilium, the top of a pubic bone, a thighbone, the top of a shinbone, the top of a fibula and a metatarsal. It was named and described by Hugues Accarie, Bernard Beaudoin, Jean Dejax, Gérard Friès, Jean-Guy Michard and Philippe Taquet in 1995.[4] The genus name is derived from the Latin word genu (knee) and refers to the cnemial crest in front of the proximal end of the tibia.[4] The specific name refers to Sisteron, the town near which the specimen was found.[4]
Classification
Accarie et al. assigned Genusaurus to the ceratosaur group of theropods, more precisely to the Coelophysoidea.[4] A 2008 cladistic analysis by Carrano and Sampson placed Genusaurus in the Noasauridae along with Laevisuchus, Masiakasaurus, Noasaurus, and Velocisaurus; in turn, noasaurids are part of the Abelisauroidea group, which is part of the ceratosaur group.[3] Subsequent phylogenetic analyses found Genusaurus to be a member of the Abelisauridae, specifically the Majungasaurinae.[8]
See also
References
External links
- "Our Exhibitions: Genusaurus sisteronis" (in French) at the Réserve Naturelle Géologique de Haute-Provence, France.
Шаблон:Theropoda Шаблон:Taxonbar
- ↑ Шаблон:Cite web
- ↑ 2,0 2,1 Шаблон:Cite book
- ↑ 3,0 3,1 Шаблон:Cite journal
- ↑ 4,0 4,1 4,2 4,3 4,4 4,5 Accarie, H., B. Beaudoin, J. Dejax, G. Fries, J.C. Michard, and P. Taquet (1995). "Découverte d'un Dinosaure théropode nouveau (Genusaurus sisteronis n. g., n. sp.) dans l'Albien marin de Sisteron (Alpes de Haute-Provence, France) et extension au Crétacé inférieur de la lignée cératosaurienne". Compte rendu hebdomadaire des scéances de l'Académie des Sciences à Paris. 320 (2): 327-334 Translation into English.
- ↑ Шаблон:Cite journal
- ↑ Paul, G.S., 2010, The Princeton Field Guide to Dinosaurs, Princeton University Press p. 78
- ↑ Шаблон:Cite journal
- ↑ Шаблон:Cite journal
- Английская Википедия
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