Where: Japan (39.9° N, 141.9° E: paleocoordinates 53.1° N, 140.9° E)
• coordinate based on nearby landmark
• outcrop-level geographic resolution
When: Hiraiga Formation, Late/Upper Aptian (122.5 - 113.0 Ma)
• STRATIGRAPHIC RELATIONS: From the Hiraiga Fm. AGE: Late Aptian; justification for age not reported in text. STRATIGRAPHIC POSITION: Lower part of lower cycle of the lower part of the Hiraiga Fm; sandstone of 50 cm thickness.
• bed-level stratigraphic resolution
Environment/lithology: marine; lithified, fine-grained, pebbly sandstone
Size class: macrofossils
Collected by Kase
• COLLECTOR: T. Kase. REPOSITORY: Not stated in text.
Primary reference: T. Kase. 1984. Early Cretaceous marine and brackish-water Gastropoda from Japan 1-262 [A. Hendy/A. Hendy]more details
Purpose of describing collection: taxonomic analysis
PaleoDB collection 91260: authorized by Austin Hendy, entered by Austin Hendy on 13.09.2009
Creative Commons license: CC BY (attribution)
Taxonomic list
Crinoidea | |
Crinoidea indet. Miller 1821 Sea lily | |
Bivalvia | |
Eriphyla miyakoensis clam | |
? Eburneopecten miyakoensis scallop | |
Gastropoda | |
Otostoma japonicum snail | |
Torquesia yaegashii turret shell | |
Tylostoma miyakoensis snail | |
Hanaibursa aquilana frog shell | |
Amauropsis importuna moon snail | |
Ataphrus yokoyamai snail | |
Neritopsis tanohatensis n. sp.
Neritopsis tanohatensis n. sp. snail | |
Eriptycha minima snail | |
"Endiatrachelus cf. parallela" = Nerinella parallela
"Endiatrachelus cf. parallela" = Nerinella parallela Anderson and Hanna 1935 snail |