Superregnum:Eukaryota
Cladus:Unikonta
Cladus:Opisthokonta
Cladus:Holozoa
Regnum:Animalia
Subregnum:Eumetazoa
Cladus:ParaHoxozoa
Cladus:Bilateria
Cladus:Nephrozoa
Superphylum:Deuterostomia
Phylum:Chordata
Cladus:Olfactores
Subphylum:Vertebrata
Infraphylum:Gnathostomata
Megaclassis:Osteichthyes
Cladus:Sarcopterygii
Cladus:Rhipidistia
Cladus:Tetrapodomorpha
Cladus:Eotetrapodiformes
Cladus:Elpistostegalia
Superclassis:Tetrapoda
Cladus:Reptiliomorpha
Cladus:Amniota
Cladus:Sauropsida
Classis:Reptilia
Cladus:Eureptilia
Cladus:Romeriida
Cladus:Diapsida
Cladus:Neodiapsida
Cladus:Sauria
Cladus:Archelosauria
Superordo: †Sauropterygia
Ordo: †Plesiosauria
Subordo: †Plesiosauroidea
Familia: †Elasmosauridae
Genus: †Thalassomedon
Species (0):T. hanningtoni

• †ThalassomedonWelles, 1943

• †Thalassomedon Welles 1943 (elasmosaur) – Taxon details on Paleobiology Database.

For more multimedia, look atThalassomedon onWikimedia Commons.

• Plesiosauria
• New fossil genus-group names 1943
• Fossil genera
• Samuel Paul Welles taxa

• Pages with taxonavigation templates
• Pages with Wikimedia Commons links