American Canyon (UCMP/Stanford) (Triassic of the United States)

Also known as Omphalosaurus nevadanus type site

Where: Pershing County, Nevada (40.1° N, 118.3° W: paleocoordinates 9.7° N, 42.8° W)

• coordinate based on nearby landmark

• local area-level geographic resolution

When: Prida Formation, Middle Triassic (247.2 - 237.0 Ma)

• bed-level stratigraphic resolution

Environment/lithology: marine; limestone

Size class: macrofossils

Collected by V. C. Osmont in 1902; reposited in the UCMP

Collection methods: quarrying,

Primary reference: J. C. Merriam. 1906. Preliminary note on a new marine reptile from the Middle Triassic of Nevada. University of California Publications in Geological Sciences 5(5):71-79 [M. Carrano/M. Carrano/J. Alroy]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 34267: authorized by Matthew Carrano, entered by Matthew Carrano on 25.08.2003

Creative Commons license: CC BY (attribution)

Taxonomic list

Chondrichthyes
 Hybodontiformes - Acrodontidae
Acrodus alexandrae Wemple 1906 elasmobranch
Reptilia
 Ichthyosauria -
 Ichthyosauria - Mixosauridae
"Cymbospondylus natans" = Phalarodon nordenskioeldii, Phalarodon fraasi
"Cymbospondylus natans" = Phalarodon nordenskioeldii Hulke 1873 ichthyosaur
Phalarodon fraasi Merriam 1910 ichthyosaur
 Ichthyosauria - Cymbospondylidae
Cymbospondylus sp. Leidy 1868 ichthyosaur
Cymbospondylus petrinus Leidy 1868 ichthyosaur
 Ichthyosauria - Omphalosauridae
Omphalosaurus nevadanus n. gen. n. sp.
Omphalosaurus nevadanus n. gen. n. sp. Merriam 1906 ichthyosaur
UCMP 1019