Shigejizawa, Kami-yasse, Kesennuma City (Permian of Japan)

Where: Japan (39.0° N, 141.5° E: paleocoordinates 23.9° N, 114.1° E)

• coordinate based on nearby landmark

• outcrop-level geographic resolution

When: Shigejizawa Member (Kanokura Formation), Wordian (266.9 - 264.3 Ma)

• Middle part of member

• group of beds-level stratigraphic resolution

Environment/lithology: marine; lithified, fine-grained sandstone

Size class: macrofossils

Preservation: mold/impression

Collected by K. Nakazawa

Primary reference: K. Nakazawa and N.D. Newell. 1968. Permian bivalves of Japan. Memoirs of the Faculty of Science, Kyoto University, Series of Geology and Mineralogy 35(1):1-108 [M. Clapham/M. Clapham]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 114493: authorized by Matthew Clapham, entered by Matthew Clapham on 15.08.2011

Creative Commons license: CC BY (attribution)

Taxonomic list

Show authors, comments, and common names
Bivalvia
 Cardiidia - Sanguinolitidae
Sanguinolites sp., Sanguinolites kamiyassensis n. sp., Wilkingia sp.
Sanguinolites sp. M'Coy 1844 clam
Sanguinolites kamiyassensis n. sp. Nakazawa and Newell 1968 clam
Wilkingia sp. Wilson 1959 clam
 Carditida - Astartidae
? Astartella "sp. d"
? Astartella "sp. d" Hall 1858 clam
 Trigoniida - Trigoniidae
"Schizodus tobai" = Lyroschizodus tobai
"Schizodus tobai" = Lyroschizodus tobai Hayasaka 1925 clam
 Pectinida - Limipectinidae
Acanthopecten cf. coloradoensis
Acanthopecten cf. coloradoensis Newberry 1861 scallop
 Pectinida - Annuliconchidae
Annuliconcha kitakamiensis
Annuliconcha kitakamiensis Murata 1964 scallop
 Pectinida - Deltopectinidae
Cyrtorostra cf. lunwalensis
Cyrtorostra cf. lunwalensis Reed 1944 scallop
 Pectinida - Aviculopectinidae
Hayasakapecten sasakii, Aviculopecten "sp. a", Aviculopecten cf. hataii, "? Etheripecten hayasakai" = Aviculopecten hayasakai
Hayasakapecten sasakii Murata 1964 scallop
Aviculopecten "sp. a" M'Coy 1851 scallop
Aviculopecten cf. hataii Murata 1964 scallop
"? Etheripecten hayasakai" = Aviculopecten hayasakai Murata 1964 scallop
 Pectinida - Streblochondriidae
Streblopteria "sp. a", ? Streblopteria "sp. b"
Streblopteria "sp. a" McCoy 1851 scallop
? Streblopteria "sp. b" McCoy 1851 scallop
 Ostreida - Bakevelliidae
Towapteria nipponica, "Waagenoperna (Permoperna) hayamii" = Permoperna trapezoidalis
Towapteria nipponica Nakazawa and Newell 1968 oyster
"Waagenoperna (Permoperna) hayamii" = Permoperna trapezoidalis Kayser 1883 oyster
 Ostreida - Pinnidae
Aviculopinna sp.
Aviculopinna sp. Meek 1864 oyster
Aviculopinna cf. rectangularis (based on conulariid)
 Arcida - Parallelodontidae
Parallelodon cf. tenuistriatus, Parallelodon cf. longus
Parallelodon cf. tenuistriatus Meek and Worthen 1866 clam
Parallelodon cf. longus Maslennikov 1935 clam