Toyora, Protogrammoceras nipponicum zone, Locality (7) Sakuraguchidani V. 10d2 (Jurassic to of Japan)

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

• Paleocoordinates: 46.3° N, 157.1° E (Wright 2013)

• coordinate estimated from map

• small collection-level geographic resolution

When: Nb Member (Nishinakayama Formation), Late/Upper Pliensbachian to Late/Upper Pliensbachian (192.9 - 182.9 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

• Lower to Middle Jurassic shallow marine (partly brackish?) clastic deposits
• silty-sandy shale with sandstone bands

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 38183: authorized by Martin Aberhan, entered by Sabine Nürnberg on 18.04.2004

Creative Commons license: CC0 (CC0)

Taxonomic list

Show authors, comments, and common names
Bivalvia
 Pectinida - Oxytomidae
Meleagrinella sp.
Meleagrinella sp. Whitfield 1855 scallop
 Myalinida - Inoceramidae
Pseudomytiloides matsumotoi
Cephalopoda
 Ammonoida -
"Ammonoida indet." = Ammonoidea
"Ammonoida indet." = Ammonoidea Zittel 1884 ammonite
 Ammonitida -
Ammonitina indet.
Ammonitina indet. Hyatt 1889 ammonite
Aptychi (isolated)
 Ammonitida - Hildoceratidae
Protogrammoceras onoi, Protogrammoceras yabei, Protogrammoceras nipponicum, Protogrammoceras sp., Fuciniceras nakayamense, Fuciniceras primordium, Fuciniceras sp., Lioceratoides matsumotoi, Harpoceras chrysanthemum, Harpoceras inouyei, Harpoceras okadai, Harpoceras sp.
Protogrammoceras sp. Spath 1913 ammonite
Fuciniceras sp. Haas 1913 ammonite
Harpoceras sp. ammonite
 Ammonitida - Dactylioceratidae
Dactylioceras helianthoides
 Ammonitida - Lytoceratidae
Lytoceras "sp. A"
Lytoceras "sp. A" Suess 1865 ammonite
sp. A
 Phylloceratida - Phylloceratidae
Holcophylloceras sp.
Holcophylloceras sp. Spath 1927 ammonite
 Belemnoida -
Belemnoida indet.
Belemnoida indet. Gray 1849 belemnite