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Leurospondylus ultimus

Reptilia - Plesiosauria - Elasmosauridae

Taxonomy
Leurospondylus ultimus was named by Brown (1913). Its type specimen is AMNH 5261, a partial skeleton (35 vertebral centra and 16 spines, of which there are 12 cervicals, 18 dorsals and 5 caudals; 30 ribs, 7 abdominal ribs, coracoids, scaulae, humeri, ilia, ischi), and it is a 3D body fossil. Its type locality is east bank, Red Deer River, which is in a Maastrichtian marine siliciclastic in the Horseshoe Canyon Formation of Canada. It is the type species of Leurospondylus.

Synonymy list
YearName and author
1913Leurospondylus ultimus Brown p. 606 figs. 1-7
1930Leurospondylus ultimus Hay p. 119
1962Leurospondylus ultimus Welles pp. 3, 75
1966Leurospondylus ultimus Russell p. 14

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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
speciesultimus

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.

†Leurospondylus ultimus Brown 1913
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Diagnosis
No diagnoses are available