Where: Okinawa, Japan (26.2° N, 127.7° E: paleocoordinates 26.5° N, 127.2° E)
• coordinate estimated from map
• outcrop-level geographic resolution
When: Yonabaru Formation (Shimajiri Group), Pliocene (5.3 - 2.6 Ma)
• Yonabaru Mudstone (now a formation) spans calcareous nannofossil zones CN10b to middle of CN12b and planktonic foram zones PL1 to PL4 (UjiiĆ©, 1994), indicating an age of primarily Pliocene (but ranging from latest Messinian to possibly early Gelasian).
• group-level stratigraphic resolution
Environment/lithology: transition zone or lower shoreface; poorly lithified, gray, blue, silty, sandy claystone and concretionary sandstone
Size class: macrofossils
Primary reference: F. S. MacNeil. 1960. Tertiary and Quaternary Gastropoda of Okinawa: A comparison of the late Miocene, Pliocene, and Pleistocene Gastropoda of Okinawa with related faunas of East Asia together with a resume of the geological setting of the fossiliferous deposits. United States Geological Survey Professional Paper 339:1-148 [A. Miller/C. Ferguson/P. Wagner]more details
Purpose of describing collection: taxonomic analysis
PaleoDB collection 26804: authorized by Arnold Miller, entered by Chad Ferguson on 01.11.2002
Creative Commons license: CC BY (attribution)
Taxonomic list
Gastropoda | |
? Atys okinawa snail | |
Argyropeza cf. schepmaniana cerith snail | |
Hipponix (Malluvium) cf. lissus hoof shell | |
"Ancilla (Baryspira) cf. albocallosa" = Amalda (Baryspira)
"Ancilla (Baryspira) cf. albocallosa" = Amalda (Baryspira) snail | |
Ancilla (Turrancilla) cf. lanceolata olive snail | |
Aptyxis okinawa n. sp.
Aptyxis okinawa n. sp. snail | |
"Phos (Tritiaria) dingsi n. sp." = Nassarius (Tritiaria)
"Phos (Tritiaria) dingsi n. sp." = Nassarius (Tritiaria) snail | |
Conus sieboldianus, ? Conus cf. yabei, "Conus cf. aculeiformis" = Conasprella (Fusiconus) aculeiformis
Conus sieboldianus cone shell
? Conus cf. yabei cone shell
"Conus cf. aculeiformis" = Conasprella (Fusiconus) aculeiformis Reeve 1844 cone shell | |
Terebra aff. torquata auger snail | |
? Unedogemmula sp. n. sp.
? Unedogemmula sp. n. sp. MacNeil 1960 turrid |