Where: Fukushima, Japan (37.1° N, 140.9° E: paleocoordinates 43.7° N, 137.6° E)
• coordinate based on nearby landmark
When: Asagai Formation (Shiramizu Group), Oligocene (33.9 - 23.0 Ma)
• formation-level stratigraphic resolution
Environment/lithology: offshore; poorly lithified sandstone and poorly lithified, sandy mudstone
Preservation: cast
Primary reference: Y. Ishida. 1992. Fossil ophiuroids from the Oligocene Asagai Formation of Iwaki, Fukushima, Japan. Bulletin of the National Science Museum C18(2):65-78 [L. Villier/L. Villier/L. Villier]more details
Purpose of describing collection: taxonomic analysis
PaleoDB collection 32038: authorized by Loic Villier, entered by Loic Villier on 02.06.2003, edited by Mark Uhen
Creative Commons license: CC BY (attribution)
Taxonomic list
Aves | |
| |
Ophiuroidea | |
Amphioplus uchigoensis n. sp.
Amphioplus uchigoensis n. sp. Ishida 1992 brittle star | |
Gastropoda | |
Diodora sp. Gray 1821 snail | |
Bivalvia | |
Thracia sp. Blainville 1824 clam | |
"Mya cf. grewingki" = Mya (Arenomya) grewingki
"Mya cf. grewingki" = Mya (Arenomya) grewingki Makiyama 1934 softshell clam | |
Clinocardium sp., "Clinocardium decoratum" = Clinocardium (Clinocardium) nuttallii, "Clinocardium asagaiense" = Ciliatocardium asagaiense
Clinocardium sp. Keen 1936 cockle
"Clinocardium decoratum" = Clinocardium (Clinocardium) nuttallii Conrad 1837 cockle
"Clinocardium asagaiense" = Ciliatocardium asagaiense Makiyama 1934 cockle | |