North of Unobe, Oikawa-Mura (Pleistocene of Japan)

Where: Japan (35.2° N, 140.2° E: paleocoordinates 35.4° N, 140.0° E)

• coordinate based on nearby landmark

• outcrop-level geographic resolution

When: Kiwada Formation, Calabrian (1.8 - 0.8 Ma)

• Initially reported as "Pliocene" but biostratigraphy, magnetostratigraphy, and tephrochronology constrain the Kiwada Formation to 1.9-1.2 Ma (Masayuki et al., 2019).

• group of beds-level stratigraphic resolution

Environment/lithology: marine; siliciclastic sediments

Size class: macrofossils

Collection methods: Repository: Institute of Geology and Palaeontology, Tohoku University, Sendai (IGPS)

Primary reference: K. Hatai. 1948. New Tertiary Brachiopoda from Japan. Journal of Paleontology 22:494-499 [M. Clapham/M. Clapham]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 233106: authorized by Matthew Clapham, entered by Matthew Clapham on 13.01.2024

Creative Commons license: CC BY (attribution)

Taxonomic list

Rhynchonellata
 Terebratulida - Dallinidae
Isumithyris kazusaensis n. gen. n. sp.
Isumithyris kazusaensis n. gen. n. sp. Hatai 1948