Where: Japan (35.4° N, 135.1° E: paleocoordinates 32.2° N, 111.2° E)
• coordinate based on nearby landmark
• outcrop-level geographic resolution
When: Gujo Formation, Changhsingian (254.2 - 252.2 Ma)
• group of beds-level stratigraphic resolution
Environment/lithology: marine; lithified, black shale
Size class: macrofossils
Preservation: mold/impression, replaced with pyrite
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 114491: authorized by Matthew Clapham, entered by Matthew Clapham on 15.08.2011
Creative Commons license: CC BY (attribution)
Taxonomic list
Bivalvia | |
Septimyalina sp. Newell 1942 clam | |
Aviculopecten shiroshitai n. sp.
Aviculopecten shiroshitai n. sp. Nakazawa and Newell 1968 scallop | |
? Leptochondria "sp. a" Bittner 1891 scallop
? Leptochondria "sp. b" Bittner 1891 scallop | |
? Pernopecten sp. Winchell 1865 scallop | |
Towapteria cf. nipponica, Tambanella gujoensis n. gen. n. sp., Bakevellia (Bakevellia) "n. sp.", Bakevellia (Bakevellia) gujoensis n. sp.
Towapteria cf. nipponica Nakazawa and Newell 1968 oyster
Tambanella gujoensis n. gen. n. sp. Nakazawa and Newell 1968 oyster
Bakevellia (Bakevellia) "n. sp." King 1848 oyster
Bakevellia (Bakevellia) gujoensis n. sp. Nakazawa 1959 oyster | |
Aviculopinna sp. Meek 1864 oyster | |
? Lopha murakamii n. sp.
? Lopha murakamii n. sp. Nakazawa and Newell 1968 oyster | |
Promytilus "sp. a" Newell 1942 mussel
Promytilus ? maiyensis Nakazawa and Newell 1968 mussel | |
Pyramus planus n. sp.
Pyramus planus n. sp. Nakazawa and Newell 1968 clam | |
Edmondia "sp. a" de Koninck 1841 clam
Edmondia "sp. b" de Koninck 1841 clam | |
Permophorus tenuistriatus n. sp., Gujocardita oviformis n. gen. n. sp.
Permophorus tenuistriatus n. sp. Nakazawa and Newell 1968 clam
Gujocardita oviformis n. gen. n. sp. Nakazawa and Newell 1968 clam | |
Vacunella rostrata n. sp.
Vacunella rostrata n. sp. Nakazawa and Newell 1968 clam | |
Costatoria kobayashii Kambe 1951 clam
Neoschizodus permicus n. sp. Nakazawa 1960 clam | |
Actinodontophora aff. katsurensis Ichikawa 1951 clam | |
Strophomenata | |
"Schellwienella cf. ruber" = Orthothetina ruber
"Schellwienella cf. ruber" = Orthothetina ruber Frech 1911 | |
Spinomarginifera aff. kueichowensis Huang 1932 |