Where: Japan (35.4° N, 137.0° E: paleocoordinates 45.0° N, 144.6° E)
• coordinate stated in text
• small collection-level geographic resolution
When: Hexasaturnalis hexagonus assemblage-zone zone, Middle Toarcian to Middle Toarcian (182.0 - 175.6 Ma)
• bed-level stratigraphic resolution
Environment/lithology: marine; chert and mudstone
Size class: microfossils
Primary reference: R. Hori. 1990. Lower Jurassic Radiolarian Zones of SW Japan. Transactions and Proceedings of the Paleontological Society of Japan, N.S. 159:562-586 [J. Pálfy/A. Kocsis]more details
Purpose of describing collection: biostratigraphic analysis
PaleoDB collection 120271: authorized by József Pálfy, entered by Adam Kocsis on 09.11.2011
Creative Commons license: CC BY (attribution)
Taxonomic list
Protozoa | |
Hsuum "sp. X" Pessagno 1977 radiolarian
Hsuum busuangaense radiolarian |