Also known as Alzadasaurus riggsi type locality
Where: Montana (45.0° N, 104.4° W: paleocoordinates 44.5° N, 64.3° W)
• coordinate based on nearby landmark
• small collection-level geographic resolution
When: Belle Fourche Formation (Colorado Group), Late/Upper Cenomanian (99.6 - 93.5 Ma)
• formation-level stratigraphic resolution
Environment/lithology: marine; lithology not reported
Size class: macrofossils
Reposited in the FMNH
Primary reference: S. P. Welles. 1943. Elasmosaurid plesiosaurs with description of new material from California and Colorado. Memoirs of the University of California 13:125-254 [R. Benson/R. Benson]more details
Purpose of describing collection: taxonomic analysis
PaleoDB collection 76731: authorized by Matthew Carrano, entered by Matthew Carrano on 30.11.2007, edited by Roger Benson
Creative Commons license: CC BY (attribution)
Taxonomic list
Reptilia | |
"Alzadasaurus riggsi n. gen. n. sp." = Thalassomedon hanningtoni
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