Round Mountain, west (Triassic of the United States)
Where: Shasta County, California (40.8° N, 122.0° W: paleocoordinates 15.8° N, 57.7° W)
When: Cedar Formation, Late/Upper Triassic (237.0 - 201.4 Ma)
Environment/lithology: marine; lithology not reported
Size class: macrofossils
Primary reference: W. B. Clark and M. W. Twitchell. 1915. The Mesozoic and Cenozoic Echinodermata of the United States. United States Geological Survey Bulletin 54:1-341 [L. Villier/J. Millet/M. Uhen]more details
Purpose of describing collection: general faunal/floral analysis
PaleoDB collection 203308: authorized by Mark Uhen, entered by Mark Uhen on 09.08.2019
Creative Commons license: CC BY (attribution)
Taxonomic list
Show authors, comments, and common names
| Echinoidea | |
Cidaris shastensis n. sp., Cidaris dilleri n. sp.
Cidaris shastensis n. sp. Clark and Twitchell 1915 pencil urchin
Cidaris dilleri n. sp. Clark and Twitchell 1915 pencil urchin | |
| Crinoidea | |
Isocrinus californicus n. sp.
Isocrinus californicus n. sp. Clark and Twitchell 1915 Sea lily | |