PBDB Collection

new trilobite collection, Gomi Quarry: Ludlow, Japan
collected by Y. Sako, T. Mizobuchi

List of taxa

Where & when

Geology

Taphonomy & methods

Metadata & references

Taxonomic list

Artiopoda - Lichida - Lichidae

	Metaleiolichas tuberculatus n. sp. Kobayashi and Hamada 1987	Kobayashi and Hamada 1987

	Paraleiolichas globulus n. sp. Kobayashi and Hamada 1987	Kobayashi and Hamada 1987

	Dicranopeltis tricornis n. sp. Kobayashi and Hamada 1986	Kobayashi and Hamada 1986

	? Apolichas sp. Kobayashi and Hamada 1974
Artiopoda - Corynexochida - Styginidae

	Bumastus agmakros n. sp. Kobayashi et al. 1984

	Bumastus kattoi n. sp. Kobayashi et al. 1984

	Bumastus sakoi n. sp. Kobayashi et al. 1984

	Bumastus glomerosus Kobayashi and Hamada 1974	Kobayashi and Hamada 1987

	? Illaenoides magnisulcatus n. sp. Kobayashi and Hamada 1986	Kobayashi and Hamada 1986

	? Illaenoides abnormis n. sp. Kobayashi and Hamada 1986	Kobayashi and Hamada 1986

	? Opoa trinodosa n. sp. Kobayashi and Hamada 1986	Kobayashi and Hamada 1986

	Japonoscutellum geniculatum n. sp. Kobayashi and Hamada 1985	Kobayashi and Hamada 1985

	Japonoscutellum japonicum laticephalum Kobayashi and Hamada 1986	Kobayashi and Hamada 1986

	Japonoscutellum japonicum puteatum Kobayashi and Hamada 1986	Kobayashi and Hamada 1986

	Japonoscutellum tunidum n. sp. Kobayashi and Hamada 1987	Kobayashi and Hamada 1987
Artiopoda - Phacopida - Phacopidae

	? Eophacops sp. Delo 1935
Artiopoda - Phacopida - Cheiruridae

	Cerauroides orientalis Kobayashi and Hamada 1973	Kobayashi and Hamada 1987

	Ichiyamella megacranidia	Kobayashi and Hamada 1986

	Ichiyamella subglobula n. sp. Kobayashi and Hamada 1986	Kobayashi and Hamada 1986

	Sphaerexochus hiratai Kobayashi and Hamada 1974	Kobayashi and Hamada 1986

	Pseudocheirurus sp. Prantl and Pribyl 1947
	= Pseudocheirurus gomiensis n. sp. Kobayashi and Hamada 1985	Kobayashi and Hamada 1985
Artiopoda - Phacopida - Encrinuridae

	? Dindymene megacranidia n. sp. Kobayashi and Hamada 1985	Kobayashi and Hamada 1985

	Staurocephalus sp. Barrande 1846

	Encrinurus similis n. sp. Kobayashi and Hamada 1985	Kobayashi and Hamada 1985

	Encrinurus sp. Emmrich 1844
	= Encrinurus subtrigonalis n. sp. Kobayashi and Hamada 1985	Kobayashi and Hamada 1985
Artiopoda - Proetida - Proetidae

	Cyphoproetus latiaxis n. sp. Kobayashi and Hamada 1986	Kobayashi and Hamada 1986
see common names

Geography

Country:	Japan	State/province:	Skikoku	County:	Kôchi Prefecture
Coordinates:	33.5° North, 133.2° East (view map)
Paleocoordinates:
Basis of coordinate:	estimated from map
Geographic resolution:	outcrop

Time

Period:	Silurian	Epoch:	Ludlow
10 m.y. bin:	Silurian 2
Key time interval:	Ludlow
Age range of interval:	426.7 - 422.7 m.y. ago

Stratigraphy

Formation:	Fukata
Stratigraphic resolution:	formation
Stratigraphy comments: Cerauroides orientalis horizon, in stage G3 (Early Ludlovian)

Lithology and environment

Primary lithology:	lithified "reef rocks"
Secondary lithology:	red lithified "shale"
Includes fossils?	Y
Lithology description: limestone breccia with red shale
Environment:	reef, buildup or bioherm
Geology comments: submarine talus deposits along the outer slope of the wave resistant reef front [redeposited]

Taphonomy

Modes of preservation:	body
Size of fossils:	macrofossils

Collection methods and comments

Collection methods:	surface (in situ),field collection
Reason for describing collection:	taxonomic analysis
Collectors:	Y. Sako, T. Mizobuchi

Metadata

Database number:	188692
Authorizer:	M. Hopkins, B. Allen	Enterer:	M. Hopkins, B. Allen
Modifier:	P. Wagner	Research group:	marine invertebrate
Created:	2017-09-13 15:59:28	Last modified:	2025-02-22 15:12:02
Access level:	the public	Released:	2017-09-13 15:59:28
Creative Commons license:	CC0

Reference information

Primary reference:

63325.

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]

Secondary references:

63330		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]
63331		T. Kobayashi and T. Hamada. 1986. The second addition of the Silurian trilobite fauna of Yokokura-Yama, Shikoko, Japan. Transactions and Proceedings of the Paleontological Society of Japan, N.S. 143:447-462 [M. Hopkins/M. Hopkins]
63324		T. Kobayashi and T. Hamada. 1987. The third addition to the Silurian trilobite fauan of Yokokura-Yama, Shikoku, Japan. Transactions and Proceedings of the Paleontological Society of Japan, N.S. 147:109-113 [M. Hopkins/M. Hopkins]
74740		C. P. Stocker, D. J. Siveter, P. D. Lane, M. Williams, T. Oji, GTanaka, T. Komatsu, S. Wallis, D. J. Siveter and T. R. A. Vandenbroucke. 2019. The Silurian and Devonian proetid and aulacopleurid trilobites of Japan and their palaeogeographical significance . Fossils and Strata 64:205-232 [P. Wagner/P. Wagner/P. Wagner]