Also known as Yoshii

Where: Gunma, Japan (36.3° N, 139.0° E: paleocoordinates 37.8° N, 137.2° E)

• coordinate stated in text

When: Haraichi Formation (Annaka Group), Tortonian (11.6 - 7.2 Ma)

• earliest late Miocene

•

•The Haraichi Formation is bracketed by the underlying Baba and the overlying Kamikoizawa tuffs [140]. 40Ar/39Ar dating places the Baba Tuff at 11.3 Ma [141]. The Kamikoizawa Tuff has not yet been dated directly, but an earliest late Tortonian age (less than 11.0 Ma) has been suggested on the basis of sedimentation rates [142]. (Marx & Fordyce, 2015)

• formation-level stratigraphic resolution

Environment/lithology: deep-water; lithology not reported

Size class: macrofossils

Preservation: original phosphate

Primary reference: T. Kimura and Y. Hasegawa. 2010. A new baleen whale (Mysticeti: Cetotheriidae) from the earliest late Miocene of Japan and a reconsideration of the phylogeny of cetotheres. Journal of Vertebrate Paleontology 30(2):577-591 [M. Uhen/M. Uhen]more details

Purpose of describing collection: general faunal/floral analysis

PaleoDB collection 97324: authorized by Mark Uhen, entered by Mark Uhen on 23.07.2010

Creative Commons license: CC BY (attribution)