Where: Japan (33.4° N, 130.7° E: paleocoordinates 39.9° N, 126.6° E)
• coordinate based on nearby landmark
• outcrop-level geographic resolution
When: Ashiya Group, Rupelian (33.9 - 28.1 Ma)
• Lowest part of the Ashiya Group. Lower Ashiya Group is early Oligocene (CP18 nannoplankton zone) according to Ozaki et al. (1993).
• group of beds-level stratigraphic resolution
Environment/lithology: marine; lithified sandstone
Size class: macrofossils
Collected by M. Kato, T. Nagao
Primary reference: S. Shimizu. 1926. On two species of Nautiloidea from the Tertiary of Japan. Science Reports of the Tohoku Imperial University, 2nd Series, Geology 9:25-27 [M. Clapham/M. Clapham]more details
Purpose of describing collection: taxonomic analysis
PaleoDB collection 179892: authorized by Matthew Clapham, entered by Matthew Clapham on 03.07.2016, edited by Mark Uhen
Creative Commons license: CC BY (attribution)
Taxonomic list
Bivalvia | |
Pinna asakuraensis n. sp.2
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Glycimeris altoumbonata n. sp.2
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Gastropoda | |
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Cephalopoda | |
"Nautilus japonicus n. sp." = Eutrephoceras japonicus
"Nautilus japonicus n. sp." = Eutrephoceras japonicus Shimizu 1926 nautiloid | |
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