Where: Okinawa, Japan (26.3° N, 127.8° E: paleocoordinates 26.3° N, 127.6° E)
• coordinate estimated from map
• outcrop-level geographic resolution
When: Naha Formation (Ryukyu Group), Calabrian (1.8 - 0.8 Ma)
• Naha Formation ranges from the middle Calabrian (c. 1.3 Ma) to the Middle Pleistocene (c. 0.4 Ma), according to Yamamoto et al. (2006). Collection is 18 feet above the base, so a Calabrian age is assigned here.
• bed-level stratigraphic resolution
Environment/lithology: lagoonal or restricted shallow subtidal; poorly lithified, brown, white, calcareous grainstone and poorly lithified, brown, white limestone
Size class: macrofossils
Preservation: original aragonite
Collected by Maxim Elias; reposited in the USNM
Primary reference: G. A. Cooper. 1957. Tertiary and Pleistocene Brachiopods of Okinawa, Ryukyu Islands. United States Geological Survey Professional Paper 314(A):1-20 [A. Hendy/A. Hendy]more details
Purpose of describing collection: taxonomic analysis
PaleoDB collection 190242: authorized by Matthew Clapham, entered by Matthew Clapham on 03.12.2017
Creative Commons license: CC BY (attribution)
Taxonomic list
Rhynchonellata | |
Gryphus hanzawai Yabe and Hatai 1935 | |
Kikaithyris hanzawai Yabe 1932 |