Irimi, Shigeyasu City, Akiyoshi (Permian of Japan)

Where: Japan (34.2° N, 131.2° E: paleocoordinates 15.8° N, 98.8° E)

• coordinate estimated from map

• outcrop-level geographic resolution

When: Pseudofusulina ambigua foram zone, Akiyoshi Group, Artinskian (290.1 - 279.3 Ma)

• group of beds-level stratigraphic resolution

Environment/lithology: reef, buildup or bioherm; lithified, shelly/skeletal bindstone

• Composed of authochthonous skeletons of bryozoans and algae which form a rigid binding framework (bryoalgal boundstone) with many kinds of fine sediments in the interstitial space.

Size class: macrofossils

Collection methods: peel or thin section,

Primary reference: A. Sugimura and M. Ota. 1980. Some Lower Permian Bryozoa from the Akiyoshi Limestone Group, Southwest Japan. Bulletin of the Akiyoshi-Dai Museum of Natural History 15:47-58 [D. Bottjer/C. Powers]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 64354: authorized by David Bottjer, entered by Catherine Powers on 06.09.2006

Creative Commons license: CC BY (attribution)

Taxonomic list

Show authors, comments, and common names
Stenolaemata
 Cystoporata - Fistuliporidae
Fistulipora irimiensis n. sp., Fistulipora aff. volongensis
Fistulipora irimiensis n. sp. Sugimura and Ota 1980
Fistulipora aff. volongensis Nikiforova 1938
Fistulipora aff. grandis volongensis
 Cryptostomata - Hyphasmoporidae
Streblascopora supergrossa
 Cystoporida - Hexagonellidae
Meekoporella akiyoshiensis
 Trepostomida - Stenoporidae
Stenopora toriyamai n. sp.
Stenopora toriyamai n. sp. Sugimura and Ota 1980