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Leurospondylus

Reptilia - Plesiosauria - Elasmosauridae

Taxonomy
Leurospondylus was named by Brown (1913) [Sepkoski's age data: K u K Maes-l Sepkoski's reference number: 2]. Its type is Leurospondylus ultimus.

It was assigned to Alzadasaurinae by Welles (1962); and to Elasmosauridae by Hay (1930), Welles (1943), Carroll (1988), Sepkoski (2002).

Species
L. ultimus (type species)

Synonymy list
YearName and author
1913Leurospondylus Brown p. 606
1930Leurospondylus Hay p. 119
1943Leurospondylus Welles pp. 190-191
1962Leurospondylus Welles p. 4
1988Leurospondylus Carroll
2002Leurospondylus Sepkoski p. 605

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RankNameAuthor
kingdomAnimalia()
—Bilateria
—EubilateriaAx 1987
—Deuterostomia
phylumChordataHaeckel 1874
subphylumVertebrata
superclassGnathostomata
—Osteichthyes()
subclassSarcopterygii()
subclassDipnotetrapodomorpha(Nelson 2006)
subclassTetrapodomorpha()
—Tetrapoda
—Reptiliomorpha
—Anthracosauria
RankNameAuthor
subclassAmphibiosauriaKuhn 1967
—Cotylosauria()
—Amniota
—Sauropsida
classReptilia
subclassEureptilia()
—Romeriida
—Diapsida()
suborderSauropterygia
orderPlesiosauriade Blainville 1835
superfamilyPlesiosauroideaWelles 1943
familyElasmosauridaeCope 1869
genusLeurospondylusBrown 1913

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.

G. †Leurospondylus Brown 1913
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†Leurospondylus ultimus Brown 1913
Diagnosis
ReferenceDiagnosis
J. J., Jr. Sepkoski 2002Vertebrae all short, much wider than long with articular faces flat. Ribs single-headed throughout. Coracoids without clavicular processes widely separated. Obturator foramina not separated? Ischia triradiate curved plates uniting at anterior-internal angle, posterior angles widely separated. Humerus and femur of equal length.