Subfamily
Valid Extinct

Alzadasaurinae

Welles, 1962

No Wikipedia summary available.

Temporal range
Triassic
Jurassic
Cretaceous
Paleogene
Neogene
252 201 145 66 0 Ma
PBDB occurrences
3
Group
Sauroptérygiens
Carnivore aquatic, depth=surface Marine
Ogmodirus 1
Alzadasaurus 2
1 Ogmodirus · 2 Alzadasaurus
PBDB
Classification
Sauropterygia Suborder
Plesiosauria Order
Plesiosauroidea Superfamily
Elasmosauridae Family
Alzadasaurinae Subfamily
Fossil sites 3 geolocated sites
Distribution
Top countries
🇺🇸 United States
2
🇨🇦 Canada
1
Geological formations
Greenhorn Limestone
1
Bearpaw Shale
1
Temporal distribution
Campanian (83.6–72.2 Ma)
2
Turonian (93.9–89.8 Ma)
1
Bibliography
Original description
S. P. Welles. 1962. A new species of elasmosaur from the Aptian of Colombia and a review of the Cretaceous plesiosaurs. University of California Publications in Geological Sciences 44(1):1-96
Bibliography (3)
B. A. Schumacher and M. J. Everhart. 2005. A stratigraphic and taxonomic review of plesiosaurs from the old "Fort Benton Group" of central Kansas: a new assessment of old records. Paludicola 5(2):33-54
D. G. Darby and R. W. Ojakangas. 1980. Gastroliths from an Upper Cretaceous plesiosaur. Journal of Paleontology 54(3):548-556
D. A. Russell. 1967. Cretaceous vertebrates from the Anderson River N. W. T. Canadian Journal of Earth Sciences 4(1):21-38 DOI ↗