Where: Japan (40.3° N, 140.1° E: paleocoordinates 40.3° N, 140.1° E)
• coordinate based on nearby landmark
• outcrop-level geographic resolution
When: Wakimoto Formation, Middle Pleistocene (0.8 - 0.1 Ma)
• Fossils come from the upper part of the beds underlying the Sandy shale beds. The stratigraphy includes the "Gray shale beds" overlain by the "Alternation of sandstone and shale beds" and then the "Sandy shale beds." The "Alternation of sandstone and shale beds" likely corresponds to the Wakimoto beds as proposed by S. Toyama. Wakimoto Formation is Middle Pleistocene age (Ozawa & Kamiya, 2005).
• group of beds-level stratigraphic resolution
Environment/lithology: offshore; poorly lithified, coarse-grained sandstone
Size class: macrofossils
Collection methods: Repository: Institute of Geology and Paleontology, Tohoku University, Sendai (IGPS)
Primary reference: K. M. Hatai. 1940. The Cenozoic Brachiopoda of Japan. Science Reports, Tohoku Imperial University, Series 2 20:1-413 [M. Clapham/M. Clapham]more details
Purpose of describing collection: taxonomic analysis
PaleoDB collection 190675: authorized by Matthew Clapham, entered by Matthew Clapham on 13.12.2017
Creative Commons license: CC BY (attribution)
Taxonomic list
Gastropoda | |
Turritella saishuensis turret shell | |
Bivalvia | |
"Arca boucardi" = Tetrarca boucardi
"Arca boucardi" = Tetrarca boucardi Jousseaume 1894 clam | |
Limopsis azumana clam | |
Cardium muticum cockle | |
Venericardia ferruginea Clessin 1888 clam | |
"Astarte alaskensis" = Astarte elliptica
"Astarte alaskensis" = Astarte elliptica Brown 1827 clam | |
Rhynchonellata | |
Hemithyris psittacea Gmelin 1790 | |
Laqueus rubellus Sowerby 1846
Laqueus japonicus Yabe and Hatai 1934
Laqueus hanawensis Hayasaka 1929 | |
Terebratalia pacifica, Terebratalia coreanica, Terebratalia bialata, Terebratalia hayasakai, Terebratalia asanoi, Terebratalia gouldii
Terebratalia pacifica Hatai 1936
Terebratalia coreanica Adams and Reeve 1850
Terebratalia bialata Nomura and Hatai 1936
Terebratalia hayasakai Hatai 1939
Terebratalia asanoi Nomura and Hatai 1936
Terebratalia gouldii Dall 1891 | |
Nipponithyris yabei Hatai 1939 | |
Terebratulina crossei Davidson 1882
Terebratulina yabei Nomura and Hatai 1936
Terebratulina hanawensis Hatai 1939 |