Iwaizaki, Member G, Hashikami Village, Motoyoshi County, Miyagi Prefecture (Permian of Japan)

Where: Japan (38.8° N, 141.6° E: paleocoordinates 25.6° N, 115.7° E)

• coordinate based on nearby landmark

• outcrop-level geographic resolution

When: Lepidolina shiraiwensis foram zone, G Member (Iwaizaki Formation), Capitanian (264.3 - 259.5 Ma)

• 8 m thick

• group of beds-level stratigraphic resolution

Environment/lithology: lithified, black limestone

Size classes: mesofossils, microfossils

Preservation: replaced with silica

Collection methods: chemical, acetic,

Primary reference: K. Ishizaki. 1964. Middle Permian ostracodes from the Iwaizaki Limestone, northeast Japan. Science Reports of the Tohoku University. Second Series, Geology 36:139-160 [M. Clapham/M. Clapham/M. Clapham]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 109844: authorized by Matthew Clapham, entered by Matthew Clapham on 28.05.2011

Creative Commons license: CC BY (attribution)

Taxonomic list

Show authors, comments, and common names
Deuteropoda
  -
Ostracoda indet.
Ostracoda indet. Latreille 1802 ostracod
Ostracoda
 Leperditellocopida - Scrobiculidae
Roundyella neopapillosa n. sp.
Roundyella neopapillosa n. sp. Ishizaki 1964 ostracod
 Platycopida - Cavellinidae
? Cavellina nipponica n. sp.
? Cavellina nipponica n. sp. Ishizaki 1964 ostracod
 Palaeocopida - Hollinellidae
Hollinella elliptica n. sp.
Hollinella elliptica n. sp. Ishizaki 1964 ostracod
 Palaeocopida - Kirkbyidae
Kirkbya subnipponica n. sp., Kirkbya magniforma n. sp., Kirkbya centrotumida n. sp., Kirkbya subquadriforma n. sp., Kirkbya atolla n. sp., Kirkbya multicresta n. sp., Ectodemites globosa n. sp., Aurikirkbya subkellettae n. sp., Aurikirkbya formula n. sp.
Kirkbya subnipponica n. sp. Ishizaki 1964 ostracod
Kirkbya magniforma n. sp. Ishizaki 1964 ostracod
Kirkbya centrotumida n. sp. Ishizaki 1964 ostracod
Kirkbya subquadriforma n. sp. Ishizaki 1964 ostracod
Kirkbya atolla n. sp. Ishizaki 1964 ostracod
Kirkbya multicresta n. sp. Ishizaki 1964 ostracod
Ectodemites globosa n. sp. Ishizaki 1964 ostracod
Aurikirkbya subkellettae n. sp. Ishizaki 1964 ostracod
Aurikirkbya formula n. sp. Ishizaki 1964 ostracod
 Palaeocopida - Amphissitidae
Polytylites kitanipponica n. sp., Amphissites centronotus
Polytylites kitanipponica n. sp. Ishizaki 1964 ostracod
Amphissites centronotus Ulrich and Bassler 1906 ostracod
 Podocopida - Microcheilinellidae
"Tubulibairdia venusta" = Microcheilinella venusta
"Tubulibairdia venusta" = Microcheilinella venusta Chen 1958 ostracod
 Podocopida - Bairdiidae
Ceratobairdia ambigua n. sp., Bairdiacypris deloi, Bairdia eucurvia n. sp., Bairdia trianguliformis, Bairdia cf. oklahomaensis, Bairdia nagaiwensis, Spinobairdia sp.
Ceratobairdia ambigua n. sp. Ishizaki 1964 ostracod
Bairdiacypris deloi Bradfield 1935 ostracod
Bairdia eucurvia n. sp. Ishizaki 1964 ostracod
Bairdia trianguliformis Chen 1958 ostracod
Bairdia cf. oklahomaensis Harlton 1927 ostracod
Bairdia nagaiwensis Ishizaki 1963 ostracod