Where: Wyoming (43.2° N, 109.2° W: paleocoordinates 14.5° N, 31.4° W)
• coordinate based on nearby landmark
• outcrop-level geographic resolution
When: Franson Member (Phosphoria Formation), Wuchiapingian (259.9 - 254.2 Ma)
• "Thin phosphate bed at top of Pustula Member" indicates uppermost part of Franson member. Davydov et al. 2017 dated an ash bed in the upper Meade Peak Member at 260.57 ± 0.07 / 0.14 / 0.31 Ma, indicating that the Meade Peak is as young as uppermost Capitanian.
• group of beds-level stratigraphic resolution
Environment/lithology: offshore; lithified, phosphatic shale
Size class: macrofossils
Primary reference: C. C. Branson. 1933. Fish fauna of the middle Phosphoria Formation. Journal of Geology 41:174-183 [M. Clapham/M. Clapham]more details
Purpose of describing collection: taxonomic analysis
PaleoDB collection 90237: authorized by Matthew Clapham, entered by Matthew Clapham on 14.07.2009
Creative Commons license: CC BY (attribution)
Taxonomic list
Chondrichthyes | |
Helodus subpolitus Branson 1916 chimaera | |
"Hamatus phosphoriensis" = Arctacanthus phosphoriensis
"Hamatus phosphoriensis" = Arctacanthus phosphoriensis Branson 1916 chimaera |