Basic info Taxonomic history Classification Relationships
Morphology Ecology and taphonomy External Literature Search Age range and collections

Rhomaleosaurus megacephalus

Reptilia - Sauropterygia - Rhomaleosauridae

Taxonomy
Plesiosaurus megacephalus was named by Stutchbury (1846). Its type specimen is BRSMG Cb2335 (holotype, destoryed); LEICS G221.1851 (neotype), a skeleton, and it is a 3D body fossil. Its type locality is Street-on-the-Fosse (Pylle), ~4 km south of Shepton Mallet, which is in a Hettangian marine horizon in the Blue Lias Formation of the United Kingdom.

It was recombined as Thaumatosaurus megacephalus by Lydekker (1889); it was recombined as Eurycleidus megacephalus by Andrews (1922) and Delair (1960); it was recombined as Rhomaleosaurus megacephalus by Cruickshank (1994) and O'Keefe (2001).

Synonymy list
YearName and author
1846Plesiosaurus megacephalus Stutchbury
1881Plesiosaurus megacephalus Sollas pp. 472-476 figs. 8-13
1889Thaumatosaurus megacephalus Lydekker p. 166
1922Eurycleidus megacephalus Andrews p. 29
1948Plesiosaurus megacephalus Swinton pp. 350-356
1960Eurycleidus megacephalus Delair p. 59
1994Rhomaleosaurus megacephalus Cruickshank p. 250
2001Rhomaleosaurus megacephalus O'Keefe p. 12

Is something missing? Join the Paleobiology Database and enter the data

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
genusRhomaleosaurus
speciesmegacephalus()

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
No diagnoses are available