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Thalassomedon
Taxonomy
Thalassomedon was named by Welles (1943) [Sepkoski's age data: K u].
It was assigned to Alzadasaurinae by Welles (1962); to Plesiosauria by Sepkoski (2002); to Elasmosauridae by Welles (1943), Welles (1949), Carroll (1988), Carpenter (1999) and Otero et al. (2012); and to Euelasmosaurida by O'Gorman (2019).
It was assigned to Alzadasaurinae by Welles (1962); to Plesiosauria by Sepkoski (2002); to Elasmosauridae by Welles (1943), Welles (1949), Carroll (1988), Carpenter (1999) and Otero et al. (2012); and to Euelasmosaurida by O'Gorman (2019).
Synonymy list
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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. †Thalassomedon Welles 1943
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†Thalassomedon hanningtoni Welles 1943
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Invalid names: Alzadasaurus riggsi Welles 1943 [synonym]
Diagnosis
No diagnoses are available
Measurements
No measurements are available
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| Source: o = order | |||||
| Reference: Kiessling 2004 | |||||
Age range: Late/Upper Cenomanian or 99.60000 to 93.50000 Ma
Collections (2 total)
| Time interval | Ma | Country or state | Original ID and collection number |
|---|---|---|---|
| Early/Lower Cenomanian | USA (Colorado) | T. hanningtoni (77350) | |
| Late/Upper Cenomanian | USA (Montana) | Elasmosaurus serpentinus (76731) |