PBDB Taxon

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Proteosaurus platyodon

Reptilia - Proteosauridae

Taxonomy

Ichthyosaurus platyodon was named by Conybeare (1822).

It was recombined as Proteosaurus platyodon by Hay (1902) and Hay (1930); it was recombined as Leptopterygius platyodon by von Huene (1922) and Delair (1960).

Synonyms

Ichthyosaurus lonchiodon was named by Owen (1840). It is a 3D body fossil.

It was recombined as Leptopterygius lonchiodon by von Huene (1922) and Delair (1960); it was synonymized subjectively with Ichthyosaurus platyodon by McGowan (1974).
Ichthyosaurus chiroligostinus was named by Hawkins (1834). It is a 3D body fossil. Its type locality is near the church, Lyme Regis, which is in a Hettangian marginal marine marl in the Blue Lias Formation of the United Kingdom.

It was synonymized subjectively with Ichthyosaurus platyodon by Owen (1840); it was synonymized subjectively with Leptopterygius platyodon by Delair (1960).

Synonymy list

Year	Name and author
1822	Ichthyosaurus platyodon Conybeare pp. 94-105 fig. 34
1822	Ichthyosaurus platyodon Parkinson p. 300
1834	Ichthyosaurus chiroligostinus Hawkins p. 12 figs. Pl. III
1840	Ichthyosaurus platyodon Owen p. 112
1840	Ichthyosaurus lonchiodon Owen p. 116
1851	Ichthyosaurus platyodon Mantell p. 362
1851	Ichthyosaurus lonchiodon Mantell p. 363
1858	Ichthyosaurus platyodon Buckland p. 168
1902	Proteosaurus platyodon Hay p. 462
1922	Leptopterygius lonchiodon von Huene p. 16
1922	Leptopterygius platyodon von Huene p. 18
1930	Proteosaurus platyodon Hay p. 128
1934	Ichthyosaurus platyodon Swinton p. 66
1960	Leptopterygius platyodon Delair p. 71
1960	Leptopterygius lonchiodon Delair p. 72

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Rank	Name	Author
kingdom	Animalia	()
—	Bilateria
—	Eubilateria	Ax 1987
—	Deuterostomia
phylum	Chordata	Haeckel 1874
subphylum	Vertebrata
superclass	Gnathostomata
—	Osteichthyes	()
subclass	Sarcopterygii	()
subclass	Dipnotetrapodomorpha	(Nelson 2006)
subclass	Tetrapodomorpha	()
—	Tetrapoda
—	Reptiliomorpha
—	Anthracosauria
subclass	Amphibiosauria	Kuhn 1967

Rank	Name	Author
—	Cotylosauria	()
—	Amniota
—	Sauropsida
class	Reptilia
subclass	Eureptilia	()
—	Romeriida
—	Diapsida	()
—	Ichthyosauromorpha
—	Ichthyosauriformes
—	Ichthyopterygia	(Owen 1840)
—	Eoichthyosauria
—	Ichthyosauria	(de Blainville 1835)
family	Proteosauridae
genus	Proteosaurus
species	platyodon	()

If no rank is listed, the taxon is considered an unranked clade in modern classifications. Ranks may be repeated or presented in the wrong order because authors working on different parts of the classification may disagree about how to rank taxa.

†Proteosaurus platyodon Conybeare 1822

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Invalid names: Ichthyosaurus chiroligostinus Hawkins 1834 [synonym], Ichthyosaurus lonchiodon Owen 1840 [synonym]

Diagnosis

Reference	Diagnosis
W. D. Conybeare 1822	Upper part of the tooth conical, not very acute, slightly aduncate, and thickly covered with prominent longitudinal striae.