cephalopods unit, Gomi Quarry (Silurian of Japan)

Where: Skikoku, Japan (33.5° N, 133.2° E: paleocoordinates 33.5° N, 133.2° E)

• coordinate estimated from map

• outcrop-level geographic resolution

When: Ludlow (427.4 - 423.0 Ma)

• Cerauroides orientalis horizon, in stage G3 (Early Ludlovian)

Environment/lithology: reef, buildup or bioherm; lithified reef rocks and lithified, red shale

• submarine talus deposits along the outer slope of the wave resistant reef front [redeposited]
• limestone breccia with red shale

Size class: macrofossils

Collected by Y. Sako, T. Mizobuchi

Primary reference: T. Kobayashi, J. Katto, and T. Hamada. 1984. New observations of Shiroishi-ohsawa, Mt. Yokokura, Kochi Prefecture with palaeontological studies on the cephalopods and trilobites from the locality. Research Report of the Kochi University 32:235-258 [M. Hopkins/M. Hopkins]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 188691: authorized by Melanie Hopkins, entered by Melanie Hopkins on 13.09.2017

Creative Commons license: CC BY (attribution)

Taxonomic list

 Orthocerida - Arionoceratidae
Arionoceras densiseptum n. sp. Kobayashi et al. 1984
? Arionoceras densiseptum Kobayashi et al. 1984
 Orthocerida -
Leurocycloceras sp. Foerste 1928
 Orthocerida - Orthoceratidae
Orthocycloceras gomiense n. sp. Kobayashi et al. 1984
Orthocycloceras aff. gomiense Kobayashi et al. 1984
? Michelinoceras sp. Foerste 1932
Michelinoceras alticameratum n. sp. Kobayashi et al. 1984
Michelinoceras mizobuchii n. sp. Kobayashi et al. 1984
 Orthocerida - Geisonoceratidae
? Protokionoceras fessicancellatum n. sp. Kobayashi et al. 1984