Where: Yamaguchi, Japan (34.2° N, 131.2° E: paleocoordinates 44.6° N, 122.5° E)
• coordinate estimated from map
• local area-level geographic resolution
When: Aso Formation (Mine Group), Carnian to Carnian (237.0 - 208.5 Ma)
• Upper Carnian - Lower Norian
• formation-level stratigraphic resolution
Environment/lithology: paralic; sandstone
Size class: macrofossils
Preservation: cast, mold/impression
Primary reference: I. Hayami. 1975. A systematic survey of the Mesozoic Bivalvia from Japan. The University Museum, The University of Tokyo, Bulletin (10) [M. Aberhan/S. Nurnberg/S. Nurnberg]more details
Purpose of describing collection: taxonomic analysis
PaleoDB collection 40179: authorized by Martin Aberhan, entered by Sabine Nürnberg on 19.06.2004
Creative Commons license: CC BY (attribution)
Taxonomic list
Bivalvia | |
Modiolus nagatoensis mussel | |
Waagenoperna triangularis oyster | |
Plagiostoma higaeribarense file clam
? Limatula asoensis file clam | |
Oxytoma (Oxytoma) multistriata scallop | |
Asoella laevigata scallop
Asoella confertoradiata Tokuyama 1959 scallop | |
Plicatula hekiensis Nakazawa 1955 scallop | |
Chlamys mojsisovicsi Kobayashi and Ichikawa 1949 scallop |