Also known as USGS M5042, A-187
Where: Aleutians East County, Alaska (56.0° N, 160.2° W: paleocoordinates 57.4° N, 157.4° W)
• coordinate based on nearby landmark
• outcrop-level geographic resolution
When: Unga Formation, Miocene (23.0 - 5.3 Ma)
• formation-level stratigraphic resolution
Environment/lithology: marine; lithology not reported
Size class: macrofossils
Collection methods: quarrying
Primary reference: C. D. Wagner. 1974. Fossil and recent sand dollar echinoids of Alaska. Journal of Paleontology 48(1):105-123 [M. Uhen/B. Shipps/M. Uhen]more details
Purpose of describing collection: general faunal/floral analysis
PaleoDB collection 203150: authorized by Mark Uhen, entered by Mark Uhen on 01.08.2019
Creative Commons license: CC BY (attribution)
Taxonomic list
Echinoidea | |
Echinarachnius astrodapsoides Wagner 1974 sand dollar
Echinarachnius ungaensis n. sp. Wagner 1974 sand dollar |