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Meyerasaurus victor

Reptilia - Sauropterygia - Rhomaleosauridae

Taxonomy
Plesiosaurus (Thaumatosaurus) victor was named by Fraas (1910). Its type specimen is SMNS 12478 and is a 3D body fossil. Its type locality is Holzmaden, epsilon II/3, non-specific collection date, which is in a Toarcian marine dolomite in the Posidonia Shale Formation of Germany. It is the type species of Meyerasaurus.

It was recombined as Plesiosaurus victor by Fraas (1910); it was recombined as Thaumatosaurus victor by Fraas (1920); it was recombined as Eurycleidus victor by Zittel (1932); it was recombined as Rhomaleosaurus victor by Tarlo (1960) and O'Keefe (2001); it was recombined as Meyerasaurus victor by Smith and Vincent (2010) and Benson et al. (2012).

Synonymy list
YearName and author
1910Plesiosaurus victor Fraas p. 114
1910Plesiosaurus (Thaumatosaurus) victor Fraas p. 123 figs. Plates 8-10
1920Thaumatosaurus victor Fraas
1932Eurycleidus victor Zittel p. 292
1960Rhomaleosaurus victor Tarlo p. 178
2001Rhomaleosaurus victor O'Keefe p. 11
2010Meyerasaurus victor Smith and Vincent pp. 1051-1059 figs. 1-4
2012Meyerasaurus victor Benson et al.

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RankNameAuthor
kingdomAnimalia()
Triploblastica
Nephrozoa
Deuterostomia
phylumChordataHaeckel 1847
subphylumVertebrata
superclassGnathostomata
Osteichthyes()
Sarcopterygii
subclassDipnotetrapodomorpha(Nelson 2006)
subclassTetrapodomorpha()
Tetrapoda()
Reptiliomorpha
Anthracosauria
RankNameAuthor
Batrachosauria()
Cotylosauria()
Amniota
Sauropsida
classReptilia
subclassEureptilia()
Romeriida
Diapsida()
orderSauropterygia
Pistosauria(Baur 1890)
Plesiosauria(de Blainville 1835)
familyRhomaleosauridaeNopcsa 1928
genusMeyerasaurus
speciesvictor()

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.

Diagnosis
ReferenceDiagnosis
A. S. Smith and P. Vincent 2010Moderately sized pliosauroid with the following unique combination of characters: constricted rostrum; large broad anterior interpterygoid vacuity; lateral palatine vacuities between the palatines and pterygoids; absence of a cultriform process; pterygoids meet behind the posterior interpterygoid vacuities; basioccipital tubers visible and projecting beyond the posterior margin of the pterygoid plate; bowed mandible; reinforced and keeled spatulate symphysis; posteriorly inclined dorsal surface of retroarticular process; large teeth with lingual striations; interclavicle-clavicle complex with deep mesial notch and triangular lateral wings; scapulae separated on the midline; coracoids in contact alon their entire length; humerus recurved and longer than femur; epipodials longer than wide; ten rows of gastralia. No autapomorphic characters were identified.