Okuyama, KH-3a, Kawahigashi (Triassic of Japan)

Where: Japan (35.4° N, 135.2° E: paleocoordinates 35.9° N, 111.8° E)

• coordinate based on nearby landmark

• outcrop-level geographic resolution

When: IV Member (Narabara Formation), Olenekian (251.2 - 247.2 Ma)

• Lower part (member IV)

• group of beds-level stratigraphic resolution

Environment/lithology: marine; lithified siliciclastic sediments

• Dark blue, banded or laminated sandy shale and shale, more or less slaty and often calcareous, with fine-grained sandstone (based on description of formation).

Size class: macrofossils

Preservation: mold/impression

Primary reference: K. Nakazawa. 1959. Permian and Eo-Triassic Bakevellias from the Maizuru Zone, southwest Japan. Memoirs of the College of Science, University of Kyoto, Series B 26:193-213 [M. Clapham/M. Clapham]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 115383: authorized by Matthew Clapham, entered by Matthew Clapham on 01.09.2011

Creative Commons license: CC BY (attribution)

Taxonomic list

Show authors, comments, and common names
Bivalvia
 Ostreida - Bakevelliidae
Bakevellia (Maizuria) narawarensis, Bakevellia (Neobakevellia) tsuzuradaniensis n. sp.
Bakevellia (Neobakevellia) tsuzuradaniensis n. sp. Nakazawa 1959 oyster
 Trigoniida - Myophoriidae
Neoschizodus cf. laevigatus
Neoschizodus cf. laevigatus Ziethen 1830 clam
 Nuculanida - Malletiidae
Palaeoneilo sp., Palaeoneilo cf. elliptica
Palaeoneilo sp. Hall and Whitfield 1869 clam
Palaeoneilo cf. elliptica Goldfuss 1837 clam
 Nuculanida - Nuculanidae
Nuculana aff. excavata
Nuculana aff. excavata Goldfuss 1837 pointed nut clam