Where: Japan (35.4° N, 136.6° E: paleocoordinates 23.1° N, 110.6° E)
• coordinate based on nearby landmark
• outcrop-level geographic resolution
When: Akasaka Formation, Capitanian (264.3 - 259.5 Ma)
• group of beds-level stratigraphic resolution
Environment/lithology: lithified limestone
Size class: macrofossils
Primary reference: I. Hayasaka. 1925. On some Paleozoic molluscs of Japan. 1. Lamellibranchiata and Scaphopoda. Science Reports of the Tohoku Imperial University. 2nd series, Geology 8(2):1-29 [M. Clapham/M. Clapham/M. Clapham]more details
Purpose of describing collection: taxonomic analysis
PaleoDB collection 109637: authorized by Matthew Clapham, entered by Matthew Clapham on 19.05.2011, edited by Pete Wagner
Creative Commons license: CC BY (attribution)
Taxonomic list
Gastropoda | |
Naticopsis fasciata n. sp.4, Naticopsis wakimizui n. sp.4, "Naticopsis cf. praealta" = Naticopsis (Naticopsis) praealta4, Naticopsis minoensis n. sp.4
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"Naticella japonica n. sp." = Asamiella japonica4
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"Bellerophon jonesianus" = Waagenella jonesianus4
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"Spiromphalus yabei n. gen. n. sp." = Palaeostylus pupoides3
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"Murchisonia yabei n. sp." = Akasakiella yabei4
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Porcellia puzoidea n. sp.5
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"Pleurotomaria aff. multicarinata" = Worthenia multicarinata4
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"Pleurotomaria yokoyamai n. sp." = Nipponomaria yokoyamai4
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"Solenospira" multicostata n. sp.4
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Scaphopoda | |
Prodentalium sp.1, "Dentalium neornatum n. sp." = Prodentalium neornatum, "Dentalium akasakensis n. sp." = Prodentalium akasakensis
"Dentalium neornatum n. sp." = Prodentalium neornatum Hayasaka 1925 tusk shell
"Dentalium akasakensis n. sp." = Prodentalium akasakensis Hayasaka 1925 tusk shell | |
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Bivalvia | |
Solenomorpha elegantissima n. sp.
Solenomorpha elegantissima n. sp. Hayasaka 1925 clam | |
"Myophoria japonica n. sp." = Schizodus japonicus
"Myophoria japonica n. sp." = Schizodus japonicus Hayasaka 1925 clam | |
"Liebea sinensis" = Permoperna trapezoidalis
"Liebea sinensis" = Permoperna trapezoidalis Kayser 1883 oyster | |
"Parallelodon obsoletiformis n. sp." = Grammatodon (Cosmetodon) obsoletiformis
"Parallelodon obsoletiformis n. sp." = Grammatodon (Cosmetodon) obsoletiformis Hayasaka 1925 clam |