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 - 112.0 Ma)
• STRATIGRAPHIC RELATIONS: From the Hiraiga Fm. AGE: Late Aptian; justification for age not reported in text. STRATIGRAPHIC POSITION: Uppermost of lower cycle of the lower part of the Hiraiga Fm.
• bed-level stratigraphic resolution
Environment/lithology: marine; lithified, bioturbated, gray, sandy siltstone and lithified, coarse-grained, shelly/skeletal 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 91257: authorized by Austin Hendy, entered by Austin Hendy on 13.09.2009
Creative Commons license: CC BY (attribution)
Taxonomic list
Bivalvia | |
"Ostreoida indet." = Ostreida
"Ostreoida indet." = Ostreida FĂ«russac 1822 oyster | |
Ptychomya sp. clam | |
Panopea (Myopsis) plicata Sowerby 1829 clam | |
Goniomya subarchiaci clam | |
Thracia sp. Blainville 1824 clam | |
Gastropoda | |
Archimedea rigida snail |