Nakaiu: Burdigalian, Japan

List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
Osteichthyes - Cetacea - Squalodelphinidae
1 specimen
see common names

Geography
Country:Japan State/province:Mie County:Tsu
Coordinates: 34.6° North, 136.4° East (view map)
Paleocoordinates:34.5° North, 133.7° East (Wright 2013)
Basis of coordinate:stated in text
Time
Period: Neogene Epoch: Miocene
Stage: Burdigalian 10 m.y. bin: Cenozoic 5
Key time interval: Burdigalian
Age range of interval: 20.45 - 15.98 m.y. ago
Stratigraphy
Formation:Haze Member:Iu
Stratigraphy comments: Iu Mudstone Member of Haze Formation. The Iu Member is the only exposed formation at the fossil locality (Kinoshita & Yamaji, 2021). The age of the Iu Member is about 18.7 to 18.5 Ma (Burdigalian, Early Miocene) based on biostratigraphy (diatom biozone NPD2A) and magnetostratigraphy (Chron C5Er) (Hoshi, Sahashi, et al., 2019). The Haze Formation (including the Iu Member) is covered by the Oi Formation (18.5–17.0 Ma; Hoshi, Iwano et al., 2019; Hoshi, Sahashi et al., 2019; Irizuki et al., 2021). From the Oi Formation, the mandibles of an odontocete and the skull of one Isanacetus-like mysticete were reported (Tanaka et al., 2021, 2024).
Lithology and environment
Primary lithology:fine,gray mudstone
Includes fossils?Y
Lithology description: light grey fine sandstone
Environment:marine indet.
Taphonomy
Modes of preservation:body
Size of fossils:macrofossils
Collection methods and comments
Reason for describing collection:general faunal/floral analysis
Metadata
Database number:235934
Authorizer:M. Uhen Enterer:M. Uhen
Research group:vertebrate
Created:2024-08-27 16:13:22 Last modified:2025-02-22 15:12:02
Access level:the public Released:2024-08-27 16:13:22
Creative Commons license:CC0
Reference information

Primary reference:
89273. Y. Tanaka and R. Nakagawa. 2024. A new platanistoid (Odontoceti: Squalodelphinidae) from the Early Miocene of Japan. Journal of Systematic Palaeontology 22(1):2378783 [M. Uhen/M. Uhen]