KY1, Minokerazawa, Kamiyasse (Permian of Japan)

Where: Japan (39.0° N, 141.5° E: paleocoordinates 17.8° N, 108.1° E)

• coordinate stated in text

• small collection-level geographic resolution

When: Sakamotozawa Formation, Sakmarian (293.5 - 290.1 Ma)

• About 31 m above the base of the Sakamotozawa Formation.

• bed-level stratigraphic resolution

Environment/lithology: marine; lithified, fine-grained, shelly/skeletal, calcareous sandstone

• The sandstone is calcareous and fine- to medium-grained, but becomes coarse-grained in some parts. It contains several layers, which yield a number of granular (sometimes fine pebbly) calcareous debris such as brachiopods, bryozoans, crinoids, and fusulines. They are usually weathered and dissolved, showing porous occurrence on the surface. Sand grains are mainly of volcaniclastic, lithic, and calcareous fragments and subangular quartz particles.

Size class: microfossils

Preservation: mold/impression

Collected by T. Shintani

Collection methods: peel or thin section

• Repository: Department of Geology, Faculty of Science, Niigata University, with prefix NU-F (fusulinids) or NU-B (brachiopods).

Primary reference: K. Ueno, T. Shintani, and J. I. Tazawa. 2011. A fusuline fauna from the basal part of the Sakamotozawa Formation in the Kamiyasse area, South Kitakami Belt, Northeast Japan. Science Reports, Niigata University (Geology) 26:23-41 [M. Clapham/M. Clapham]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 129063: authorized by Matthew Clapham, entered by Matthew Clapham on 20.06.2012

Creative Commons license: CC BY (attribution)

Taxonomic list

Show authors, comments, and common names
Rhynchonellata
 Athyridida - Neoretziidae
Hustedia indica
Hustedia indica Waagen 1883
Strophomenata
 Productida - Echinoconchidae
? Echinoconchus sp.
 Orthotetida - Derbyiidae
Derbyia buchi, Derbyia yukisawensis
Derbyia buchi d'Orbigny 1842
Derbyia yukisawensis Tazawa and Shintani 2014
 Orthotetida - Meekellidae
Orthothetina sp., Orthothetina curvata
Orthothetina sp. Schellwien 1900
Orthothetina curvata Ustritsky 1960
Foraminifera
 Fusulinoidea - Schwagerinidae
Nipponitella sp., Pseudochusenella ex gr. cushmani, Pseudofusulina "sp. A", Pseudofusulina "sp. B", Pseudofusulina cf. callosa, Eoparafusulina sp., ? Dutkevitchia hindukushiensis
Pseudofusulina "sp. A" Dunbar and Skinner 1931
Pseudofusulina "sp. B" Dunbar and Skinner 1931
Pseudofusulina cf. callosa Rauser-Chernousova 1940
Eoparafusulina sp. Coogan 1960