Genus
Valid Extinct

Hydrotherosaurus

Welles 1943

Hydrotherosaurus is an extinct genus of elasmosaurid plesiosaur from the Upper Cretaceous Moreno Formation of Fresno County, California, USA. The only known species, H. alexandrae, was named for Annie Montague Alexander in 1943 by Samuel Paul Welles.

Temporal range
Triassic
Jurassic
Cretaceous
Paleogene
Neogene
252 201 145 66 0 Ma
PBDB occurrences
1
Group
Sauroptérygiens
Carnivore aquatic, depth=surface Marine
Hydrotherosaurus
click to enlarge
Restoration of Hydrotherosaurus alexandrae. © Nobu Tamura email:nobu.tamura@yahoo.com http://spinops.blogspot.com/ · CC BY-SA 4.0 · Wikimedia
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Classification
Sauropterygia Suborder
›
Plesiosauria Order
›
Plesiosauroidea Superfamily
›
Elasmosauridae Family
›
Euelasmosaurida Unranked clade
›
Elasmosaurinae Unranked clade
›
Hydrotherosaurus Genus
Measurements
Length
7,8 m ⓘ
Fossil sites 1 geolocated sites
Distribution
Top countries
🇺🇸 United States
1
Geological formations
Moreno
1
Temporal distribution
Maastrichtian (72.2–66 Ma)
1
Species (1)
Hydrotherosaurus alexandrae 72 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 (1)
S. P. Welles. 1940. Revision of Elasmosaurid Plesiosaurs.