Toyora, Dactylioceras helianthoides zone, Locality Nishinikayama 3U (Jurassic of Japan)

Where: Yamaguchi, Japan (34.3° N, 131.0° E: paleocoordinates 44.9° N, 138.7° E)

• coordinate estimated from map

• small collection-level geographic resolution

When: Nishinakayama Formation (Toyora Group), Early/Lower Toarcian (183.0 - 182.0 Ma)

• Locality belongs to the Dactylioceras helanthoides zone.

• bed-level stratigraphic resolution

Environment/lithology: marine; shale

• Lower to Middle Jurassic shallow marine (partly brackish?) clastic deposits

Size class: macrofossils

Primary reference: K. Tanabe. 1991. Early Jurrasic Macrofauna of the Oxygen-Depleted Epicontinental Marin Basin in the Toyora Area, West Japan. Saito Ho-on Kai Special Publication 3:147-161 [M. Aberhan/S. Nurnberg/P. Wagner]more details

Purpose of describing collection: paleoecologic analysis

PaleoDB collection 38223: authorized by Martin Aberhan, entered by Sabine Nürnberg on 19.04.2004

Creative Commons license: CC BY (attribution)

Taxonomic list

Show authors, comments, and common names
unclassified
  -
Ammonoida indet.
Cephalopoda
 Ammonitida - Hildoceratidae
Harpoceras chrysanthemum, Harpoceras (Harpoceratoides) nagatoensis, Harpoceras sp.
Harpoceras sp. ammonite