Masesawa: Zanclean, Japan

List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
Anthozoa - Scleractinia - Flabellidae
Flabellum sp. Lesson 1831
Gastropoda
Gastropoda - Naticidae
Neverita sp. Risso 1826
Gastropoda - Neogastropoda - Nassariidae
Nassarius sp. Duméril 1806
Gastropoda - Neogastropoda - Buccinidae
Gastropoda - Neogastropoda - Turridae
"Turridae" indet. Swainson 1840
Bivalvia - Arcida - Arcidae
Navicula sp. (Blainville 1825)
Bivalvia - Cardiida - Cardiidae
Bivalvia - Cardiida - Tellinidae
Bivalvia - Pholadida - Myidae
Asteroidea
unclassified
Osteichthyes - Cetacea
2 specimens
Herpetocetus sp NMNS PV19540 et USNM 362901
Oishi and Hasegawa 1995
Kimura and Hasegawa 2004
Herpetocetus sp NMNS PV19540 et USNM 362901
Osteichthyes - Odontopterygiformes
Chondrichthyes - Lamniformes - Odontaspididae
Bacillariophyceae - Coscinodiscales - Coscinodiscaceae
Bacillariophyceae - Melosirales - Stephanopyxidaceae
Bacillariophyceae - Arachnoidiscales - Arachnoidiscaceae
Bacillariophyceae - Striatellales - Striatellaceae
Bacillariophyceae - Hemidiscaceae
Actinocyclus ingens Rattray 1890
Mediophyceae - Stephanodiscales - Stephanodiscaceae
Coniferales - Cupressaceae
Glyptostrobus europaeus (Brongniart 1833)
Sequoia sp. Endlicher 1847
Angiospermae - Fagales - Betulaceae
Angiospermae - Fagales - Fagaceae
Angiospermae - Rosales - Ulmaceae
see common names

Geography
Country:Japan State/province:Iwate
Coordinates: 39.1° North, 141.2° East (view map)
Paleocoordinates:38.9° North, 140.3° East (Wright 2013)
Basis of coordinate:stated in text
Time
Period: Neogene Epoch: Pliocene
Stage: Zanclean 10 m.y. bin: Cenozoic 6
Key time interval: Zanclean
Age range of interval: 5.333 - 3.6 m.y. ago
Stratigraphy
Formation:Tatsunokuchi
Stratigraphy comments: originally listed as Yushima. Kimura and Hasegawa (2004) call it Tatsunokuchi Fm.
Lithology and environment
Primary lithology: not reported
Environment:open shallow subtidal
Geology comments: open to shallow water (changed over time), warm water
Taphonomy
Modes of preservation:body,original phosphate
Size of fossils:macrofossils
Articulated whole bodies:many
Collection methods and comments
Collection methods:surface (in situ),field collection
Reason for describing collection:general faunal/floral analysis
Metadata
Also known as:Maesawa
Database number:56300
Authorizer:M. Uhen Enterer:M. Uhen
Modifier:P. Wagner Research group:marine invertebrate,vertebrate
Created:2005-11-16 12:40:53 Last modified:2025-11-11 13:58:20
Access level:the public Released:2005-11-16 12:40:53
Creative Commons license:CC0
Reference information

Primary reference:
15167. M. Oishi, K. Ono, T. Kawakami, J. Sato, H. Nokariya and Y. Hasegawa. 1985. Pliocene baleen whales and bony-toothed bird from Iwate Prefecture, Japan (Parts I-VI). Bulletin of the Iwate Prefectural Museum 3:146-162 [M. Uhen/M. Uhen]

Secondary references:

15356 T. Kimura and Y. Hasegawa. 2004. An outline of the Miocene cetotheres of Japan. Bulletin of the Gunma Museum of Natural History 8:79-88 [M. Uhen/M. Uhen]
40386 H. Matsuoka, Y. Koda, K. Ono and Y. Hasegawa. 2003. Pseudodontorn fossils from Japan, with preliminary observations on the maxilla specimen from the Lower Oligocene Iwaki Formation, Fukushima, Japan. Bulletin of the Gunma Museum of Natural History 7:47-59 [M. Uhen/M. Uhen]
12148 M. Oishi and Y. Hasegawa. 1995. A list of fossil cetaceans in Japan. The Island Arc 3:493-505 [M. Uhen/M. Uhen/M. Uhen]