Alzadasaurus kansasensis type, Logan County [PROXY] (Cretaceous of the United States)

Where: Logan County County, Kansas (39.0° N, 101.2° W: paleocoordinates 44.5° N, 71.1° W)

• coordinate based on political unit

• small collection-level geographic resolution

When: Smoky Hill Chalk Member (Niobrara Formation), Early/Lower Campanian (83.5 - 70.6 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

 Sauropterygia - Elasmosauridae
Alzadasaurus kansasensis n. gen. n. sp.
Alzadasaurus kansasensis n. gen. n. sp. Welles 1952 elasmosaur
YPM 1130 (holotype partial postcranial skeleton)