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, sandy 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 38181: authorized by Martin Aberhan, entered by Sabine Nürnberg on 18.04.2004, edited by Matthew Carrano
Creative Commons license: CC BY (attribution)
Taxonomic list
unclassified | |
Gnathostomata | |
| |
Cephalopoda | |
| |
Harpoceras okadai, Lioceratoides matsumotoi, "Protogrammoceras onoi" = Protogrammoceras, "Protogrammoceras yabei" = Protogrammoceras, "Protogrammoceras nipponicum" = Protogrammoceras, "Protogrammoceras sp." = Protogrammoceras, "Paltarpites toyoranus" = Protogrammoceras, Fuciniceras nakayamense, Fuciniceras sp.
Harpoceras okadai ammonite
Lioceratoides matsumotoi ammonite
"Protogrammoceras onoi" = Protogrammoceras ammonite
"Protogrammoceras yabei" = Protogrammoceras ammonite
"Protogrammoceras nipponicum" = Protogrammoceras ammonite
"Protogrammoceras sp." = Protogrammoceras Spath 1913 ammonite
"Paltarpites toyoranus" = Protogrammoceras ammonite
Fuciniceras nakayamense ammonite
Fuciniceras sp. Haas 1913 ammonite | |
Dactylioceras helianthoides ammonite | |
| |
Bivalvia | |
Pseudomytiloides matsumotoi Hayami 1960 clam | |
Meleagrinella sp. Whitfield 1855 scallop |