Yoh Iron Bridge (Miocene of Japan)

Also known as Yoh Ohe

Where: Yamagata, Japan (38.3° N, 140.2° E: paleocoordinates 39.9° N, 138.4° E)

• coordinate stated in text

When: Hashigami Sandstone Member (Hongo Formation), Tortonian (11.6 - 7.2 Ma)

• Denticulopsis katayamae diatom zone, 9.0 to 10.4 Ma, late Miocene

Environment/lithology: marine; medium-grained sandstone

• mdium to-very-coarse-grained sandstone exhibiting large scale trough cross stratification

Size class: macrofossils

Preservation: original phosphate

Primary reference: S. Takahashi, D. P. Domning, and T. Saito. 1986. Dusisiren dewana, n. sp. (Mammalia: Sirenia), a new ancestor of Stellers sea cow from the upper Miocene of Yamagata prefecture, northeastern Japan. Transactions and Proceedings of the Palaeontological Society of Japan N. S. 141:296-321 [M. Uhen/M. Uhen]more details

Purpose of describing collection: general faunal/floral analysis

PaleoDB collection 71537: authorized by Mark Uhen, entered by Mark Uhen on 27.04.2007

Creative Commons license: CC BY (attribution)

Taxonomic list

Chondrichthyes
 Lamniformes - Otodontidae
"Carcharodon megalodon" = Otodus megalodon
"Carcharodon megalodon" = Otodus megalodon Agassiz 1843 megalodon
Mammalia
 Sirenia - Dugongidae
Dusisiren dewana n. sp. Takahashi et al. 1986 dugong
 Cetacea -
Cetacea indet. Brisson 1762 whale