Also known as Iga City

Where: Mie, Japan (34.8° N, 136.3° E: paleocoordinates 38.3° N, 133.6° E)

• coordinate stated in text

When: N7 foram zone, Hiramatsu Member, Burdigalian (20.4 - 16.0 Ma)

• Zone N7 of Blow (1969)

•

•Planktonic foraminiferal data place the Hiramatsu Member of the Awa Group in zone N7 [132, 133], ranging from 17.5–16.4 Ma [20, 54]; and the Yamanouchi Member of the Ayeko Formation in the upper part of zone N7 and the lower part of zone N8 [134], with zone N8 ranging from 16.4–15.1 Ma [20, 54]. Fission-track dating of a sample from the base of the Yamanouchi Member indicates an age of 17.3 ± 1.4 Ma [135]. Although the termination of zone N8 at 15.1 Ma could imply a partially Langhian range, we here constrain the age of I. laticephalus to the late Burdigalian (17.5–16.0 Ma) based on (i) the confirmed Burdigalian age of MFM 28501; (ii) the fact that the lower boundary of the Yamanouchi Member predates the Burdigalian/Langhian boundary by as much as 1 Ma, or possibly more; and (iii) the fact that the Yamanouchi Member was only correlated with the lower part of zone N8. (Marx & Fordyce, 2015)

• member-level stratigraphic resolution

Environment/lithology: marine; sandstone

Size class: macrofossils

Preservation: original phosphate

Collection methods: quarrying, surface (in situ),

Primary reference: T. Kimura and T. Ozawa. 2002. A new cetothere (Cetacea: Mysticeti) from the early Miocene of Japan. Journal of Vertebrate Paleontology 22(3):684-702 [M. Uhen/M. Uhen/M. Uhen]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 46946: authorized by Mark Uhen, entered by Mark Uhen on 27.01.2005

Creative Commons license: CC BY (attribution)