Izumi bird tracksite (Cretaceous of Japan)

Also known as Ono

Where: Fukui, Japan (43.8° N, 144.5° E: paleocoordinates 48.4° N, 148.3° E)

• coordinate based on political unit

• outcrop-level geographic resolution

When: Izuki Formation (Tetori Group), Hauterivian (132.9 - 129.4 Ma)

• upper part of Itoshiro Subgroup, = Itsuki Fm.

• bed-level stratigraphic resolution

Environment/lithology: lacustrine; black, sandy shale and coarse-grained sandstone

• described as marginal lacustrine
• conglomeratic sandstone, coarse- to fine-grained sandstone, and shale. "black sandy shale"

Size class: macrofossils

Preservation: cast, trace

Collected by M. Chiba, K. Hachiya, & M. Umemoto in 1987

Collection methods: surface (float),

• discovered by Masami Chiba, Kiichiro Hachiya, and Masayuki Umemoto

Primary reference: Y. Azuma, T. Sugimori, K. Yamada, T. Kojima, and K.-i. Takeyama. 1992. Two dinosaur footprints from the Tetori Group of Izumi Village, Fukui Prefecture, central Japan. Bulletin of the Japan Sea Research Institute, Kanazawa University, Kanazawa 24:19-33 [M. Carrano/M. Carrano/M. Carrano]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 24807: authorized by Matthew Carrano, entered by Matthew Carrano on 20.08.2002

Creative Commons license: CC BY (attribution)

Taxonomic list

 Ostreida - Ostreidae
Ostrea sp. Linnaeus 1758 oyster
 Cardiida - Neomiodontidae
 Cardiida - Corbiculidae
  - Avipedidae
Aquatilavipes izumiensis n. sp. Azuma et al. 2002 bird