Neosaurus

Neosaurus; Temporal range: Late Carboniferous-Early Permian, 300–295.5 Ma PreꞒ Ꞓ O S D C P T J K Pg N ↓
	Holotype
Scientific classification
Kingdom:	Animalia
Phylum:	Chordata
Clade:	Synapsida
Family:	† Sphenacodontidae
Genus:	† Neosaurus ; Nopsca, 1923
Type species
	†Neosaurus cynodus; (Gervais, 1869)
Synonyms
	Geosaurus cynodusGervais, 1869;

Last updated November 22, 2021

Neosaurus is an extinct genus of pelycosaur-grade synapsids from the Late Carboniferous-Early Permian of the Jura region of France. It is known only from a partial maxilla or upper jaw bone and an associated impression of the bone.^[1] The teardrop shape of the teeth in the jaw indicate that Neosaurus belongs to the family Sphenacodontidae, which includes the better-known Dimetrodon from the Southwestern United States. The maxilla was first attributed to an early diapsid reptile in 1857,^[2]^[3] and later a crocodylomorph in 1869,^[4] before finally being identified as a sphenacodont synapsid in 1899,^[5] a classification that still holds today.^[6]

A species of the hadrosaur dinosaur Hypsibema , H. missouriensis , is also called Neosaurus , although because the name was already in use, that species was renamed Parrosaurus before being reassigned to Hypsibema.^[7]

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References

↑ Nopcsa, F. 1923. "Die Familien der Reptilien". Fortschritte der Geologie und Palaeontologie 2 : 1–210
↑ Coquand, H. 1857. "Mémoire geologique sur l'existence du terrain permien et du représentant du grès vosgien dans le département de Saône-et-Loire et dans les montagnes de la Serre (Jura)". Bulletin de la Société geologique de France 14 : 13–47
↑ Coquand, H. 1858. "Mémoire geologique sur l'existence du terrain permien et du représentant du grès vosgien dans le département de Saône-et-Loire, ainsi que dans les montagnes de la Serre (Jura)". Mémoires de la Société d'Émulation du département du Doubs 2 : 1–40
↑ Gervais, P. 1869. Zoology and paléontologie générales. Nouvelles recherches sur les animaux vertébrés vivants ou fossils, Première série . 263 pp. Arthus Bertrand, Paris
↑ Baur, G. and Case, EC 1899. "The history of the Pelycosauria, with a description of the genus Dimetrodon , Cope". Transactions of the American Philosophical Society, New Series 20 : 5–62
↑ Falconnet, J. (2013). "The sphenacodontid synapsid Neosaurus cynodus, and related material, from the Permo-Carboniferous of France". Acta Palaeontologica Polonica. doi: 10.4202/app.2012.0105 .
↑ Gilmore, Charles Whitney; Stewart, Dan R. (January 1945). "A New Sauropod Dinosaur from the Upper Cretaceous of Missouri". Journal of Paleontology . Society for Sedimentary Geology. 19 (1): 23–29. JSTOR 1299165.

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[1] Nopcsa, F. 1923. "Die Familien der Reptilien". Fortschritte der Geologie und Palaeontologie 2 : 1–210

[2] Coquand, H. 1857. "Mémoire geologique sur l'existence du terrain permien et du représentant du grès vosgien dans le département de Saône-et-Loire et dans les montagnes de la Serre (Jura)". Bulletin de la Société geologique de France 14 : 13–47

[3] Coquand, H. 1858. "Mémoire geologique sur l'existence du terrain permien et du représentant du grès vosgien dans le département de Saône-et-Loire, ainsi que dans les montagnes de la Serre (Jura)". Mémoires de la Société d'Émulation du département du Doubs 2 : 1–40

[4] Gervais, P. 1869. Zoology and paléontologie générales. Nouvelles recherches sur les animaux vertébrés vivants ou fossils, Première série . 263 pp. Arthus Bertrand, Paris

[5] Baur, G. and Case, EC 1899. "The history of the Pelycosauria, with a description of the genus Dimetrodon , Cope". Transactions of the American Philosophical Society, New Series 20 : 5–62

[FJ13-6] Falconnet, J. (2013). "The sphenacodontid synapsid Neosaurus cynodus, and related material, from the Permo-Carboniferous of France". Acta Palaeontologica Polonica. doi: 10.4202/app.2012.0105 .

[7] Gilmore, Charles Whitney; Stewart, Dan R. (January 1945). "A New Sauropod Dinosaur from the Upper Cretaceous of Missouri". Journal of Paleontology . Society for Sedimentary Geology. 19 (1): 23–29. JSTOR 1299165.

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