Lophostropheus
Lophostropheus | |
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Scientific classification | |
Domain: | Eukaryota |
Kingdom: | Animalia |
Phylum: | Chordata |
Clade: | Dinosauria |
Clade: | Saurischia |
Clade: | Theropoda |
Superfamily: | †Coelophysoidea |
Genus: | †Lophostropheus Ezcurra & Cuny, 2007 |
Species: | †L. airelensis
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Binomial name | |
†Lophostropheus airelensis (Cuny & Galton, 1993)
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Synonyms | |
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Lophostropheus (pronounced: "LOAF-oh-STRO-fee-us") is an
Lophostropheus was a small to medium-sized, moderately-built, ground-dwelling,
Etymology
Lophostropheus was described and named by
Description
Estimates suggest that Lophostropheus was at best 3 m (10 ft) long and weighed 100 kilograms (220 pounds) at most.[2] In 2016 Molina-Pérez and Larramendi gave a higher estimation of 5.2 meters (17 ft) and 136 kg (300 lbs).[3] It is based on a partial skeleton first described in 1966 as a specimen of Halticosaurus.
Classification
Lophostropheus differs from other
Distinguishing anatomical features
A diagnosis is a statement of the anatomical features of an organism (or group) that collectively distinguish it from all other organisms. Some, but not all, of the features in a diagnosis are also autapomorphies. An autapomorphy is a distinctive anatomical feature that is unique to a given organism or group.
According to Ezcurra and Cuny (2007), Lophostropheus can be distinguished based on the following characteristics:
- a moderately convex anterior articular surface of the anterior postaxial cervical vertebrae (also present in Ceratosauria+Tetanurae)
- the last dorsal vertebral centrum has a large and oval lateral fossa (also observed in Herrerasaurus)
- the last dorsal vertebra has a dorsoventrally well-extended hyposphene
- an incipient concavity is present on the cranial articular surface of the cranial caudal vertebrae(also present in Ceratosauria+Tetanurae)
- the constant length of the caudal vertebrae along the length of the tail (also in Dilophosaurus)
History of discovery
In 1966, the French paleontologists Claude Larsonneur and Albert-Félix de Lapparent described a partial theropod skeleton from the Triassic-Jurassic boundary of Normandy, found in 1959 by Claude Pareyn, as Halticosaurus sp.[7] This specimen consisted of a tooth, five neck vertebrae, two vertebrae from the back, four sacral vertebrae, tail vertebrae, portions of all the pelvic bones, and an unidentified fragment.[4] It was reinterpreted in 1993 by Gilles Cuny and Peter Galton as belonging to a new species, assigned to Liliensternus and named L. airelensis.[8] Other researchers began to notice differences between L. airelensis and the type species, L. liliensterni,[5][9] such as those observed in the pleurocoels of the cervical vertebrae,[5] and in 2007, Martin Ezcurra and Gilles Cuny assigned it to its own genus, Lophostropheus.[4]
Paleobiology
Lophostropheus, as a coelophysoid, would have been a small to medium-sized bipedal carnivore,[10] probably comparable in size and habits to Liliensternus (best specimen estimated at 5.15 meters long, or 16.9 feet).[11] Very few dinosaurs are known from its time period; in fact, it is the only theropod genus known from good remains at the Triassic-Jurassic boundary.[4]
Paleoecology
The remains of the type specimen of Lophostropheus airelensis was recovered in the Airel Quarry locality of the
References
- ISBN 0-19-910207-4.
- ^ "LOPHOSTROPHEUS". Dinochecker.com. Retrieved 5 May 2013.
- ^ Molina-Pérez & Larramendi (2016). Récords y curiosidades de los dinosaurios Terópodos y otros dinosauromorfos. Spain: Larousse. p. 253.
- ^ .
- ^ a b c Rauhut, Oliver W.M.; Hungerbühler, A. (2002). "A review of European Triassic theropods". Gaia. 15: 75–88.
- ^ C., Larsonneur; and de Lapparent, Albert-Félix (1966). "Un dinosaurien carnivore, Halticosaurus, dans le Rhétien d'Airel (Manche)". Bulletin de la Société Linnéenne de Normandie (in French). 7: 108–117.
- ^ Cuny, Gilles; Galton, Peter M. (1993). "Revision of the Airel theropod dinosaur from the Triassic-Jurassic boundary (Normandy, France)". Neues Jahrbuch für Geologie und Paläontologie, Abhandlungen. 187 (3): 261–288.
- ^ Carrano, M. T., and Sampson, S. D., 2004, A review of coelophysoids (Dinosauria: theropoda) from the Early Jurassic of Europe, with comments on the late history of the coelophysoidea: Neues Jahrbuch für Geologie und Paläontologie, Monatshefte, 2004, n. 9, p. 537-558.
- ISBN 0-520-24209-2.
- ISBN 0-671-61946-2.