Tsurubo area, Iwaki City, Ashizawa Formation (Cretaceous of Japan)

Also known as Ammonite Center

Where: Fukushima, Japan (37.2° N, 141.0° E: paleocoordinates 48.2° N, 130.4° E)

• coordinate based on nearby landmark

When: Obisagawa Member (Ashizawa Formation), Late/Upper Cretaceous (100.5 - 66.0 Ma)

• member-level stratigraphic resolution

Environment/lithology: marine

Primary reference: M. Manabe, Y. Hasegawa, and T. Takahashi. 2003. A hadrosaurid vertebra from the Ashizawa Formation, Futaba Group, Fukushima, Japan. Bulletin of the Gunma Museum of Natural History 7:7-10 [B. Beatty/B. Beatty]more details

Purpose of describing collection: general faunal/floral analysis

PaleoDB collection 72267: authorized by Brian Beatty, entered by Brian Beatty on 29.05.2007, edited by Matthew Carrano

Creative Commons license: CC BY (attribution)

Taxonomic list

Chondrichthyes
 Xenacanthiformes - Diplodoselachidae
Orthacanthus sp. Agassiz 1843 elasmobranch
 Lamniformes - Cretoxyrhinidae
Cretolamna sp. Glikman 1958 mackerel shark
Actinopteri
 Salmoniformes - Enchodontidae
Enchodus sp. Agassiz 1843
Reptilia
 Neornithischia - Hadrosauridae
Hadrosauridae indet. Cope 1869 hadrosaurid
IMCF 1124
 Squamata - Mosasauridae
Mosasauridae indet. Gervais 1852 mosasaur
 Plesiosauria -