Shinyashiki, Obisa-mura (Cretaceous of Japan)

Where: Futaba, Japan (37.5° N, 141.0° E: paleocoordinates 49.1° N, 130.9° E)

• coordinate based on nearby landmark

• small collection-level geographic resolution

When: Tamayama Formation (Futaba Group), Early/Lower Santonian (85.8 - 83.5 Ma)

• "Upper Futaba beds" [?= Tamayama Formation]

Environment/lithology: marine; muddy sandstone

• "Shaly sandstone".

•"The Upper Beds, which attain a maximum thickness of 220 m, are chiefly composed of a hard coarse-grained sandstone and a conclomerate with local intercalations of shale and sandy shale".

Size class: macrofossils

Collected by Shigeyasu Tokunaga in 1922-1926

Primary reference: S. Tokunaga and S. Shimizu. 1926. The Cretaceous Formation of Futaba in Iwaki and its fossils. Journal of Faculty of Science, Imperial University of Tokyo, Section 2 1:181-212 [R. Benson/R. Benson]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 150930: authorized by Roger Benson, entered by Roger Benson on 18.09.2013

Creative Commons license: CC BY (attribution)

Taxonomic list

Cephalopoda
 Ammonitida - Hamitidae
Hamites "sp. B" Parkinson 1811 ammonite
Reptilia
 Plesiosauria -
Plesiosaurus sp. de la Beche and Conybeare 1821 plesiosaur
Anterior cervical centrum