AR0021, Kami-uwabamidani Valley (Jurassic of Japan)

Where: Japan (36.5° N, 137.5° E: paleocoordinates 43.6° N, 140.6° E)

• coordinate estimated from map

• outcrop-level geographic resolution

When: Arimine Formation, Middle Oxfordian (161.2 - 155.7 Ma)

• bed-level stratigraphic resolution

Environment/lithology: marine; lithified siltstone

Size class: macrofossils

Preservation: mold/impression

Collection methods: Repository: National Museum of Nature and Science, Tokyo (NMNS)

Primary reference: T. Sato and T. Yamada. 2014. A new Oxfordian (Late Jurassic) ammonite assemblage from the Arimine Formation (Tetori Group) in the Arimine area, southeastern Toyama Prefecture, northern Central Japan. Bulletin of the National Museum of Nature and Science, Series C, Geology and Paleontology 40:21-55 [M. Clapham/M. Clapham]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 182856: authorized by Matthew Clapham, entered by Matthew Clapham on 27.11.2016

Creative Commons license: CC BY (attribution)

Taxonomic list

Show authors, comments, and common names
Cephalopoda
 Ammonitida - Perisphinctidae
Perisphinctes (Dichotomosphintes) sp., Perisphinctes (Kranaosphinctes) matsushimai, Perisphinctes (Dichotomosphinctes) kiritaniensis, Subdiscosphinctes hachiyai n. sp.
Subdiscosphinctes hachiyai n. sp. Sato and Yamada 2014 ammonite
 Ammonitida - Oppeliidae
Ochetoceras sp., Ochetoceras cf. irregulare, Taramelliceras sp., Taramelliceras cf. costatum, Glochiceras (Glochiceras) cf. nimbatum
Ochetoceras cf. irregulare Berckhemer and Hölder 1959 ammonite
Taramelliceras sp. Del Campana 1904 ammonite
Taramelliceras cf. costatum Quenstedt 1849 ammonite
 Phylloceratida - Phylloceratidae
Ptychophylloceras cf. euphyllum, Phylloceras (Phylloceras) cf. consanguineum
Ptychophylloceras cf. euphyllum Neumayr 1871 ammonite