Gomi Quarry (Silurian of Japan)

Also known as Locality 3

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

• coordinate estimated from map

• outcrop-level geographic resolution

When: Yokokura Formation, Ludlow (427.4 - 423.0 Ma)

• Comprise "Ys 14" and "Ys 15" from the "G3 stage" of lower Ludlovian

• group of beds-level stratigraphic resolution

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

• submarine talus deposits along outer slope of wave resistant reef front [redeposited]
• "reef-breccia"

Size class: macrofossils

Collected by M. Hirata, J. Hamada

Primary reference: T. Kobayashi and T. Hamada. 1974. Silurian trilobites of Japan in comparison with Asian, Pacific and other faunas. Palaeontological Society of Japan Special Papers 18:1-155 [M. Hopkins/M. Hopkins]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 188690: authorized by Melanie Hopkins, entered by Melanie Hopkins on 13.09.2017

Creative Commons license: CC BY (attribution)

Taxonomic list

• Fossils include stromatoporoids, corals, brachiopods, calcareous algae, bryozoans, "pelecypods", gastropods, cephalopods, ostracods
Trilobita
 Corynexochida - Styginidae
Kosovopeltis angusticostata Kobayashi and Hamada 1974 trilobite
Microscutellum sp. Snajdr 1960 trilobite
Microscutellum primigenium Kobayashi and Hamada 1974 trilobite
 Corynexochida - Illaenidae
Bumastus indet. Murchison 1839 trilobite
Bumastus aff. barriensis Volborth 1864 trilobite
Bumastus (Bumastus) glomerosus n. sp. Kobayashi and Hamada 1974 trilobite
Bumastus (Bumastus) subquadratus n. sp. Kobayashi and Hamada 1974 trilobite
Bumastus (Bumastella) aspera Kobayashi and Hamada 1974 trilobite
Bumastus (Bumastella) spiculus Kobayashi and Hamada 1974 trilobite
Bumastus (Bumastella) bipunctatus Kobayashi and Hamada 1974 trilobite
 Phacopida - Phacopidae
 Phacopida - Encrinuridae
Encrinuridae indet. Angelin 1854 trilobite
Encrinurus yokokurensis n. sp. Kobayashi and Hamada 1974 trilobite
Encrinurus mamelon n. sp. Kobayashi and Hamada 1974 trilobite
 Phacopida - Cheiruridae
Sphaerexochus planirachis n. sp. Kobayashi and Hamada 1974 trilobite
Sphaerexochus hiratai n. sp. Kobayashi and Hamada 1974 trilobite
subgenus robustus
Cerauroides elongatus n. sp. Kobayashi and Hamada 1974 trilobite
Cerauroides orientalis Kobayashi and Hamada 1973 trilobite
  - Scutelluidae
Illaenoscutellum platiceps Kobayashi and Hamada 1974 trilobite
Tosacephalus fungiformis n. sp. Kobayashi and Hamada 1974 trilobite
Japonoscutellum japonicum Kobayashi and Hamada 1965 trilobite
 Proetida - Proetidae
Proetus (Gerastos) subcarinatus Kobayashi and Hamada 1974 trilobite
Proetus (Bohemiproetus) magnicerviculus Kobayashi and Hamada 1974 trilobite
Proetus (Proetus) subovalis n. sp. Kobayashi and Hamada 1974 trilobite
Decoroproetus granulatus n. sp. Kobayashi and Hamada 1974 trilobite
 Lichida - Lichidae
Apolichas truncatus Kobayashi and Hamada 1974 trilobite