Dandakosaurus | |
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Dandakosaurus restored as a megalosauroid | |
Scientific classification | |
Domain: | Eukaryota |
Kingdom: | Animalia |
Phylum: | Chordata |
Clade: | Dinosauria |
Clade: | Saurischia |
Clade: | Theropoda |
Clade: | Averostra |
Genus: | † Dandakosaurus Yadagiri, 1982 |
Species: | †D. indicus |
Binomial name | |
†Dandakosaurus indicus Yadagiri, 1982 | |
Dandakosaurus (meaning "Dandakaranya lizard") is a genus of extinct averostran theropod dinosaur from the Kota Formation, Andhra Pradesh, India. It lived 183 to 175 million years ago from the latest Pliensbachian to the late Toarcian stages of the Early Jurassic. Little is known about the genus and some paleontologists consider it to be a nomen dubium .
The holotype is partial pubis, GSI 1/54Y/76, discovered in the Kota Formation of India between 1958 and 1961 and was described as an indeterminate carnosaur in 1962. [1] [2] Other material referred to the genus include dorsal vertebrae, caudal vertebrae, a tooth and a partial ischium. The type species, D. indicus, was named by Ponnala Yadagiri in 1982. [3] [2]
The tooth was described as being recurved and heavily compressed. The distal carina possessed small denticles. [3] The carinae were positioned centrally and the tooth was subsymmetrical labial and distal profiles. [4] The dorsal vertebrae lack pleurocoels and opisthocoelous. The caudal vertebrae bore depressions on the lateral sides. It was amphicoelous and had a keel on its ventral side. It is possible that the vertebrae belong to a sauropodomorph. The obturator fenestra of the pubis is absent, instead being an obturator notch. [5] The pubis is unique in that it points ventrally, unlike the usual forward-facing condition seen in Saurischians, giving it a mesopubic condition. [6]
In 2016 Molina-Pérez and Larramendi Dandakosaurus was estimated to be 10 meters (33 feet) in length and 2.3 tonnes (2.5 short tons) in weight. [7]
Dandakosaurus is currently classified as Averostra incertae sedis , variously suggested to be a basal ceratosaur [8] or basal tetanuran. [2] [5] [9]
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Lophostropheus is an extinct genus of coelophysoid theropod dinosaur that lived approximately 205.6 to 196.5 million years ago during the boundary between the Late Triassic Period and the Early Jurassic Period, in what is now Normandy, France. Lophostropheus is one of the few dinosaurs that may have survived the Triassic–Jurassic extinction event.
Berberosaurus is a genus of neotheropod dinosaur, possibly a ceratosaur, from the Toarcian-age "Toundoute Continental Series" found in the Central High Atlas of Toundoute, Ouarzazate, Morocco. The type species of the genus Berberosaurus is B. liassicus, in reference to the Lias epoch. Berberosaurus might be the oldest known ceratosaur, and is based on partial postcranial remains. This genus represents the oldest formally identified theropod from the North of Africa, as well one of the few from the region in the Early Jurassic.
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