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Thalassomedon hanningtoni

Reptilia - Plesiosauria - Elasmosauridae

Taxonomy
Thalassomedon hanningtoni was named by Welles (1943). Its type specimen is DMNH 1588, a skeleton, and it is a 3D body fossil. Its type locality is Thalassomedon type, Pritchett (DMNH), which is in a Cenomanian marine shale/claystone in the Graneros Shale Formation of Colorado.

Synonyms
  • Alzadasaurus riggsi was named by Welles (1943). Its type specimen is FMNH 12009, a set of postcrania (sixty vertebrae, both scapulae and both coracoids, the left paddle almost entire, the left pubis, and both ischia and ilia), and it is a 3D body fossil. Its type locality is Alzada, which is in a Cenomanian marine horizon in the Belle Fourche Formation of Montana.

    It was synonymized subjectively with Thalassomedon hanningtoni by Carpenter (1999).
Synonymy list
YearName and author
1943Alzadasaurus riggsi Welles
1943Thalassomedon hanningtoni Welles
1943Alzadasaurus riggsi Welles pp. 186-187 fig. 30
1949Thalassomedon hanningtoni Welles
1962Alzadasaurus riggsi Welles pp. 3, 52 fig. 10
1962Thalassomedon hanningtoni Welles pp. 3, 52 fig. 9
1999Thalassomedon hanningtoni Carpenter p. 162
2019Thalassomedon hanningtoni O'Gorman

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

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.

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Invalid names: Alzadasaurus riggsi Welles 1943 [synonym]
Diagnosis
No diagnoses are available