Where: Logan County County, Kansas (39.0° N, 101.2° W: paleocoordinates 42.3° N, 67.7° W)
• coordinate based on political unit
• small collection-level geographic resolution
When: Smoky Hill Chalk Member (Niobrara Formation), Santonian (86.3 - 83.6 Ma)
• "Smoky Hill Chalk Member, Niobrara Chalk (Santonian-Campanian). Carpenter (1990) was the first to assign this specimen to the Smoky Hill Chalk member, and his determination is confirmed here following examination of the fossil's matrix" (Storrs 1999, p. 2).
•"Hesperornis Zone...basal Campanian" (Carpenter 1999, p. 160)
• bed-level stratigraphic resolution
Environment/lithology: marine; lithology not reported
Size class: macrofossils
Collected by H. A. Brous & B. F. Mudge in 1876; reposited in the YPM
Collection methods: surface (in situ)
Primary reference: G. W. Storrs. 1999. An examination of Plesiosauria (Diapsida: Sauropterygia) from the Niobrara Chalk (Upper Cretaceous) of Central North America. Paleontological Contributions of the University of Kansas 11:1-15 [R. Benson/R. Benson]more details
Purpose of describing collection: taxonomic analysis
PaleoDB collection 118875: authorized by Roger Benson, entered by Roger Benson on 17.10.2011
Creative Commons license: CC BY (attribution)
Taxonomic list
Reptilia | |
Alzadasaurus kansasensis n. gen. n. sp.
Alzadasaurus kansasensis n. gen. n. sp. Welles 1952 elasmosaur YPM 1130 (holotype partial postcranial skeleton)
|