Where: Yamaguchi, Japan (34.3° N, 131.0° E: paleocoordinates 45.7° N, 139.2° E)
• coordinate estimated from map
• small collection-level geographic resolution
When: Nb Member (Nishinakayama Formation), Late/Upper Pliensbachian to Late/Upper Pliensbachian (189.6 - 182.0 Ma)
• Locality belongs to the Protogrammoceras nipponicum zone. The Nishinakayama Fm attains about 300m in maximum thickness, and is lithostratigraphically subdivided into three members, namely Na, Nb (black shales with intercalations of fine sandstone; 160m thick), and Nc in upward sequence.
• bed-level stratigraphic resolution
Environment/lithology: marine; silty shale
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 38178: authorized by Martin Aberhan, entered by Sabine Nürnberg on 18.04.2004
Creative Commons license: CC BY (attribution)
Taxonomic list
unclassified | |
Cephalopoda | |
| |
Dactylioceras helianthoides ammonite
Dactylioceras sp. Hyatt 1867 ammonite | |
| |
Fuciniceras nakayamense, Fuciniceras primordium, Fuciniceras sp., Protogrammoceras onoi, Protogrammoceras nipponicum, Protogrammoceras sp., Lioceratoides matsumotoi, Lioceratoides yokoyamai, Harpoceras chrysanthemum, Harpoceras cf. mulgravium
Fuciniceras nakayamense ammonite
Fuciniceras primordium ammonite
Fuciniceras sp. Haas 1913 ammonite
Protogrammoceras onoi ammonite
Protogrammoceras nipponicum ammonite
Protogrammoceras sp. Spath 1913 ammonite
Lioceratoides matsumotoi ammonite
Lioceratoides yokoyamai ammonite
Harpoceras chrysanthemum ammonite
Harpoceras cf. mulgravium ammonite |