Where: Idaho (42.2° N, 111.4° W: paleocoordinates 11.7° N, 35.4° W)
• coordinate based on nearby landmark
• outcrop-level geographic resolution
When: Thaynes Formation, Smithian (251.3 - 247.2 Ma)
• "below the typical Meekoceras beds of the Aspen Range"
• group of beds-level stratigraphic resolution
Environment/lithology: marine; lithified lithology not reported
Size class: macrofossils
Collected by John C. Merriam in 1903; reposited in the UCMP
Primary reference: H. M. Evans. 1904. A new cestraciont spine from the Lower Triassic of Idaho. University of California Publications, Bulletin of the Department of Geology 3(18):397-402 [M. Clapham/M. Clapham]more details
Purpose of describing collection: taxonomic analysis
PaleoDB collection 136684: authorized by Matthew Clapham, entered by Matthew Clapham on 02.12.2012, edited by Mark Uhen
Creative Commons license: CC BY (attribution)
Taxonomic list
Chondrichthyes | |
"Cosmacanthus elegans n. sp." = Nemacanthus elegans
"Cosmacanthus elegans n. sp." = Nemacanthus elegans Evans 1904 elasmobranch | |
Ophiuroidea | |
Aspidura idahoensis n. sp.
Aspidura idahoensis n. sp. Clark and Twitchell 1915 brittle star | |
Crinoidea | |
"Isocrinus smithi n. sp." = Holocrinus smithi
"Isocrinus smithi n. sp." = Holocrinus smithi Clark and Twitchell 1915 Sea lily |