Iwayakannon (IY) Section, Inuyama, IYII11 (Jurassic to of Japan)

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; black, gray, green, red, white chert and mudstone

• Rhytmically interbedded chert and mudstone. The color of the chert varies considerably, exhibiting green, gray, red, white and black hues.

Size class: microfossils

Primary reference: R. Hori. 1988. Some characteristic radiolarians from Lower Jurassic bedded cherts of the Inuyama area, Southwest Japan. Transactions and Proceedings of the Paleontological Society of Japan, N.S. 151:543-563 [J. Pálfy/A. Kocsis]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 120009: authorized by József Pálfy, entered by Adam Kocsis on 06.11.2011

Creative Commons license: CC BY (attribution)

Taxonomic list

Show authors, comments, and common names
Protozoa
 Entactinaria - Saturnalidae
Eospongosaturninus protoformis1, "Acanthocircus hexagonus" = Hexasaturnalis hexagonus, Hexasaturnalis tetraspinus1, Spongosaturninus bispinus1
Eospongosaturninus protoformis1 Yao 1972 radiolarian
"Acanthocircus hexagonus" = Hexasaturnalis hexagonus Yao 1972 radiolarian
Hexasaturnalis tetraspinus1 Yao 1972 radiolarian
Spongosaturninus bispinus1 Yao 1972 radiolarian
 Nassellaria - Hsuidae
Parahsuum transiens, Parahsuum longiconicum1, Parahsuum simplum
Parahsuum longiconicum1 Sashida 1988 radiolarian
Parahsuum simplum Yao 1982 radiolarian
 Nassellaria - Parvicingulidae
Praeparvicingula nanoconica2
Praeparvicingula nanoconica2 Hori and Otsuka 1989 radiolarian
sensu Murchey, 1984
 Nassellaria - Ultranaporidae
Napora relica1
Napora relica1 Yeh 1987 radiolarian
1Carter et al. 2010; 2Gorican et al. 2006