new trilobite collection, boulders found between Gomi and Ishiyama villages (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: Fukata Formation, Ludlow (427.4 - 423.0 Ma)

• Cerauroides orientalis horizon, in stage G3 (Early Ludlovian). Formation from Stocker et al. (2019).

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

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

Size class: macrofossils

Collected by Y. Sako, T. Mizobuchi

Collection methods: surface (in situ),

Primary reference: T. Kobayashi and T. Hamada. 1985. Additional Silurian trilobites to the Yokokura-Yama fauna from Shikoku, Japan. Transactions and Proceedings of the Paleontological Society of Japan, N.S. 139:206-217 [M. Hopkins/M. Hopkins]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 188695: authorized by Melanie Hopkins, entered by Melanie Hopkins on 13.09.2017

Creative Commons license: CC BY (attribution)

Taxonomic list

Show authors, comments, and common names
Trilobita
 Phacopida - Encrinuridae
Staurocephalus trichochin n. sp.
Staurocephalus trichochin n. sp. Kobayashi and Hamada 1985 trilobite
 Proetida - Proetidae
"Proetus (Gerastos) sugiharensis" = Hedstroemia sugiharensis
"Proetus (Gerastos) sugiharensis" = Hedstroemia sugiharensis Kobayashi and Hamada 1974 trilobite