Central Shikoku (32604R) (Cretaceous of Japan)

Where: Japan (33.7° N, 133.8° E: paleocoordinates 40.8° N, 136.0° E)

• coordinate stated in text

• outcrop-level geographic resolution

When: Pseudodictyomitra carpatica other zone, B2 Member (Birafu Formation), Berriasian (145.0 - 139.8 Ma)

• bed-level stratigraphic resolution

Environment/lithology: slope; lithified mudstone and lithified tuff

• Member B2 is composed of alternating sandstone, mudstone

•and limestone beds. The well-sorted, fine- to mediumgrained

•sandstone is arkosic. The mudstone is intercalated

•with tuff and yields Berriasian radiolarians (32604R, 32605R).

•The limestone is sandy and laminated. This unit is approximately

•115 m thick.

Size classes: mesofossils, microfossils

Primary reference: T. Kozai, K. Ishida, and Y. Kondo. 2006. Radiolarians, bivalves and the J/K boundary in the Birafu Formation, southern Kurosegawa Belt, Central Shikoku, SW Japan. Geosciences Journal 10(3):217-235 [M. Aberhan/D. Wellmanns]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 116555: authorized by Martin Aberhan, entered by Daniel Wellmanns on 09.09.2011

Creative Commons license: CC BY (attribution)

Taxonomic list

Show authors, comments, and common names
Protozoa
 Nassellaria - Sethocapsidae
Sethocapsa pseudouterculus, Sethocapsa kaminogoensis
Sethocapsa pseudouterculus Aita 1986 radiolarian
Sethocapsa kaminogoensis Aita 1986 radiolarian
 Nassellaria - Archaeodictyomitridae
Archaeodictyomitra mitra, Archaeodictyomitra apiarium
Archaeodictyomitra apiarium Rüst 1885 radiolarian
 Nassellaria - Parvicingulidae
Tethysetta boesii
Tethysetta boesii Parona 1890 radiolarian
 Nassellaria - Pseudodictyomitridae
Loopus primitivus
Loopus primitivus Matsuoka and Yao 1985 radiolarian