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

Scyphozoa
 Conulariida - Conulariidae
"Conularia rectangularis n. sp." = Neoconularia rectangularis
"Conularia rectangularis n. sp." = Neoconularia rectangularis Hayasaka 1920 jellyfish
Cephalopoda
 Nautilida - Tainoceratidae
Tainoceras kitakamiense n. sp.2 Hayasaka 1962 nautiloid
? Foordiceras sp.2 Hyatt 1893 nautiloid
Bivalvia
 Pectinida - Aviculopectinidae
Aviculopecten hayasakai3 Murata 1964 scallop
 Pectinida - Annuliconchidae
Annuliconcha kitakamiensis n. sp.3 Murata 1964 scallop
 Pectinida - Limipectinidae
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 - 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