Upper reach Rubeshibegoe River (Cretaceous of Japan)

Where: Hokkaido, Japan (44.7° N, 142.0° E: paleocoordinates 49.3° N, 130.4° E)

• coordinate estimated from map

When: Upper Sandstone Member (Osoushinai Formation), Early/Lower Campanian (83.5 - 70.6 Ma)

• member-level stratigraphic resolution

Environment/lithology: marine; lithified, concretionary, sandy, calcareous sandstone and lithified, tuffaceous, sandy sandstone

• The upper sandstone member is composed mainly of fine-grained sandstone with intercalations of very coarse-grained and tuffaceous sandstone beds.

Size class: macrofossils

Preservation: cast, concretion

Collection methods: surface (float), mechanical,

• Nakagawa Museum, Nakagawa-cho, Hokkaido, Japan collection

Primary reference: R. Hirayama and Y. Hikida. 1998. Mesodermochelys (Testudines; Chelonioidea; Dermochelyidae) from the Late Cretaceous of Nakagawa-cho, Hokkaido, North Japan. Bulletin of the Nakagawa Museum of Natural History 1:69-76 [D. Nicholson/D. Nicholson]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 152095: authorized by David Nicholson, entered by David Nicholson on 07.11.2013

Creative Commons license: CC BY (attribution)

Taxonomic list

Show authors, comments, and common names
Reptilia
 Testudines - Dermochelyidae
Mesodermochelys undulatus
Mesodermochelys undulatus Hirayama and Chitoku 1996 leatherback
Specimen no. NMV-3