Choshi (Pliocene to of Japan)

Where: Chiba, Japan (35.8° N, 140.8° E: paleocoordinates 36.5° N, 140.1° E)

• coordinate estimated from map

When: Na-arai Formation, Early/Lower Pliocene to Early/Lower Pliocene (5.3 - 2.6 Ma)

Environment/lithology: marine; lithology not reported

Size class: macrofossils

Preservation: original phosphate

Primary reference: 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]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 56942: authorized by Mark Uhen, entered by Mark Uhen on 29.11.2005

Creative Commons license: CC BY (attribution)

Taxonomic list

Show authors, comments, and common names
Mammalia
 Cetacea - Ziphiidae
Ziphiidae indet.1
Ziphiidae indet.1 Gray 1850 beaked whale
 Cetacea - Delphinidae
Delphinidae indet.1
Delphinidae indet.1 Gray 1821 dolphin
 Cetacea - Cetotheriidae
cf. Herpetocetus sp.3
cf. Herpetocetus sp.3 Van Beneden 1872 whale
 Cetacea - Balaenidae
Balaenula sp.2, Balaena sp.2
Balaenula sp.2 Van Beneden 1872 right whale
"Group VII bullae"
Balaena sp.2 Linnaeus 1758 bowhead whale
"Group VI bullae"
 Cetacea - Balaenopteridae
Balaenopteridae indet.2, "Megaptera" sp.2, Balaenoptera sp.2
Balaenopteridae indet.2 Gray 1864 rorqual
"Group II bullae"
"Megaptera" sp.2 Gray 1846 humpback whale
"Group IV bullae"
Balaenoptera sp.2 Lacépède 1804 rorqual
"Group V bullae"
 Cetacea -
Burtinopsis sp.2
Burtinopsis sp.2 Van Beneden 1872 whale
"Group III bullae"
1Oishi and Hasegawa 1995; 2Oishi and Hasegawa 1995; 3Tanaka et al. 2018