Where: Japan (34.2° N, 134.8° E: paleocoordinates 42.3° N, 123.8° E)
• coordinate estimated from map
• outcrop-level geographic resolution
When: Pachydiscus subcompressus ammonoid zone, Shimonada Formation, Early/Lower Maastrichtian (70.6 - 66.0 Ma)
• Float nodule, probably derived from part of the Shimonada Formation.
• bed-level stratigraphic resolution
Environment/lithology: marine; lithified, fine-grained, sandy, calcareous siltstone
Size class: macrofossils
Preservation: mold/impression
Collected by Maeda
• Repository: Department of Geology, Kyushu University
Primary reference: Y. Morozumi. 1985. Late Cretaceous (Campanian and Maastrichtian) ammonites from Awaji Island, southwest Japan. Bulletin of the Osaka Museum of Natural History 39:1-58 [M. Clapham/M. Clapham]more details
Purpose of describing collection: taxonomic analysis
PaleoDB collection 176814: authorized by Matthew Clapham, entered by Matthew Clapham on 03.03.2016
Creative Commons license: CC BY (attribution)
Taxonomic list
Cephalopoda | |
"Pachydiscus (Pachydiscus) aff. subcompressus" = Pachydiscus subcompressus
"Pachydiscus (Pachydiscus) aff. subcompressus" = Pachydiscus subcompressus Matsumoto 1954 ammonite |