Imo, IGPS It044, Yahagi, Rikuzentakata City, Iwate Prefecture (Permian of Japan)

Where: Japan (39.0° N, 141.5° E: paleocoordinates 21.9° N, 112.5° E)

• coordinate based on nearby landmark

• outcrop-level geographic resolution

When: Shigejizawa Member (Kanokura Formation), Roadian (272.3 - 268.8 Ma)

• group of beds-level stratigraphic resolution

Environment/lithology: marine; lithified siliciclastic sediments

Size class: macrofossils

Preservation: cast, mold/impression

Primary reference: I. Hayasaka. 1920. A new species of Conularia from southern Kitakami, Japan. Journal of the Geological Society of Japan 27:87-90 [M. Clapham/M. Clapham]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 109636: authorized by Matthew Clapham, entered by Matthew Clapham on 19.05.2011

Creative Commons license: CC BY (attribution)

Taxonomic list

Show authors, comments, and common names
Cephalopoda
 Nautilida - Tainoceratidae
Tainoceras kitakamiense n. sp.2, ? Foordiceras sp.2
Tainoceras kitakamiense n. sp.2 Hayasaka 1962
? Foordiceras sp.2 Hyatt 1893
Bivalvia
 Pectinida - Limipectinidae
Acanthopecten onukii3, Acanthopecten spinosus n. sp.1, Acanthopecten cf. coloradoensis3
Acanthopecten onukii3 Murata 1964 scallop
Acanthopecten spinosus n. sp.1 Hayasaka 1925 scallop
Acanthopecten cf. coloradoensis3 Newberry 1861 scallop
Acanthopecten spinosus Hayasaka (pl 8, fig 7)
 Pectinida - Annuliconchidae
Annuliconcha kitakamiensis n. sp.3
Annuliconcha kitakamiensis n. sp.3 Murata 1964 scallop
 Pectinida - Aviculopectinidae
Aviculopecten hayasakai3
Aviculopecten hayasakai3 Murata 1964 scallop
 Pectinida - Euchondriidae
"Crenipecten kesenensis n. sp." = Euchondria kesenensis1
"Crenipecten kesenensis n. sp." = Euchondria kesenensis1 Hayasaka 1925 scallop
 Ostreida - Bakevelliidae
"Waagenoperna (Permoperna) hayamii" = Permoperna trapezoidalis4
"Waagenoperna (Permoperna) hayamii" = Permoperna trapezoidalis4 Kayser 1883 oyster
 Trigoniida - Trigoniidae
"Myophoria tobai n. sp." = Lyroschizodus tobai1
"Myophoria tobai n. sp." = Lyroschizodus tobai1 Hayasaka 1925 clam
Myophoria subelegans var. tobai
Scyphozoa
 Conulariida - Conulariidae
"Conularia rectangularis n. sp." = Neoconularia rectangularis
"Conularia rectangularis n. sp." = Neoconularia rectangularis Hayasaka 1920 jellyfish
1Hayasaka 1925; 2Hayasaka 1962; 3Murata 1964; 4Nakazawa and Newell 1968