Genus
Valid Extinct

Thalassomedon

Welles 1943

Thalassomedon is a genus of plesiosaur, named by Welles in 1943.

Temporal range
Triassic
Jurassic
Cretaceous
Paleogene
Neogene
252 201 145 66 0 Ma
PBDB occurrences
2
Group
Sauroptérygiens
Carnivore aquatic, depth=surface Marine
Thalassomedon
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Thalassomedon in the American Museum of Natural History Visit my blog at ideonexus.com © Ryan Somma · CC BY-SA 2.0 · Wikimedia
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Classification
Sauropterygia Suborder
›
Plesiosauria Order
›
Plesiosauroidea Superfamily
›
Elasmosauridae Family
›
Euelasmosaurida Unranked clade
›
Thalassomedon Genus
Measurements
Length
11,7 m ⓘ
Fossil sites 2 geolocated sites
Distribution
Top countries
🇺🇸 United States
2
Geological formations
Graneros Shale
1
Belle Fourche
1
Temporal distribution
Cenomanian (100.5–93.9 Ma)
2
Species (2)
Alzadasaurus riggsi subjective synonym of Thalassomedon hanningtoni 101 Ma
Thalassomedon hanningtoni 101 Ma
Images 1
Bibliography
Original description
S. P. Welles. 1943. Elasmosaurid plesiosaurs with description of new material from California and Colorado. Memoirs of the University of California 13:125-254
Bibliography (2)
K. Carpenter. 1999. Revision of North American elasmosaurs from the Cretaceous of the Western Interior. Paludicola 2(2):148-173
S. P. Welles. 1943. Elasmosaurid plesiosaurs with description of new material from California and Colorado. Memoirs of the University of California 13:125-254