PBDB Taxon

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Morturneria seymourensis

Reptilia - Plesiosauria - Elasmosauridae

Taxonomy

Turneria seymouriensis was named by Chatterjee and Creisler (1994). Its type specimen is TTU P 9219, a partial skeleton (skull and cervical vertebrae), and it is a 3D body fossil.

It was synonymized subjectively with Aristonectes parvidens by Gasparini et al. (2003); it was recombined as Morturneria seymourensis by Chatterjee and Creisler (1994), O'Keefe (2001), O'Keefe et al. (2017), O'Gorman et al. (2019) and O'Gorman (2019).

Synonyms

Turneria seymourensis was named by Chatterjee and Small (1989). Its type specimen is TTU P 9219, a partial skeleton (skull and cervical vetebrae), and it is a 3D body fossil. Its type locality is Seymour Island, Klb 9, which is in a Maastrichtian marine siltstone/carbonate in the López de Bertodano Formation of Antarctica. It is the type species of Turneria.

It was replaced with Morturneria seymourensis by Chatterjee and Creisler (1994).

Synonymy list

Year	Name and author
1989	Turneria seymourensis Chatterjee and Small p. 199 figs. 2-10
1989	Turneria seymouriensis Chatterjee and Small p. 199
1994	Morturneria seymourensis Chatterjee and Creisler p. 142
1994	Turneria seymouriensis Chatterjee and Creisler p. 142
2001	Morturneria seymourensis O'Keefe p. 16
2017	Morturneria seymourensis O'Keefe et al.
2019	Morturneria seymourensis O'Gorman
2019	Morturneria seymourensis O'Gorman et al. p. 215

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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	()
suborder	Sauropterygia
order	Plesiosauria	de Blainville 1835
superfamily	Plesiosauroidea	Welles 1943
family	Elasmosauridae	Cope 1869
—	Weddellonectia
subfamily	Aristonectinae	()
genus	Morturneria
species	seymourensis	()

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.

†Morturneria seymourensis Chatterjee and Creisler 1994

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Invalid names: Turneria seymourensis Chatterjee and Small 1989 [replaced]

Diagnosis

Reference	Diagnosis
J. P. O'Gorman et al. 2019	Deeply arched palate with a medial ventral keel formed anteriorly by the vomer; obliquely oriented internal naris; dentary teeth with procumbent alveoli recurving; internal naris formed by palatine; discrete, round facet for articulation of flared end of pa raoccipital process on squamosal only; eight or nine teeth on premaxilla; at least 38 teeth on maxilla and at least 46 teeth on dentary; procumbent teeth.