Obata locality 2: Coniacian - Santonian, Japan

List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
Osteichthyes - Mosasauridae
1 specimen
NSM-PV15003 (three partial caudal vertebrae with articulating haemal arches and one extremely fragmentary centrum without haemal arch)
    = Russellosaurina indet. Bell 1997
Caldwell and Konishi 2007
see common names

Geography
Country:Japan State/province:Hokkaido
Coordinates: 42.7° North, 142.3° East (view map)
Paleocoordinates:50.9° North, 139.2° East (Wright 2013)
Basis of coordinate:estimated from map
Geographic resolution:small collection
Time
Period: Cretaceous Epoch: Late Cretaceous
Stage: Coniacian - Santonian 10 m.y. bin: Cretaceous 6
Key time interval: Coniacian - Santonian
Age range of interval: 89.8 - 83.6 m.y. ago
Stratigraphy
Geological group:Yezo Formation:Kashima
Stratigraphic resolution:bed
Stratigraphy comments: Santonian or Coniacian
Lithology and environment
Primary lithology: mudstone
Lithology description: mudstone nodule
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
Also known as:Hobetsu
Database number:94680
Authorizer:R. Butler, P. Mannion Enterer:R. Butler, P. Mannion
Modifier:M. Carrano Research group:vertebrate
Created:2010-03-09 01:52:58 Last modified:2025-02-22 15:12:02
Access level:the public Released:2010-03-09 01:52:58
Creative Commons license:CC0
Reference information

Primary reference:
32250. I. Obata, Y. Hasegawa, and H. Otsuka. 1972. Preliminary report on the Cretaceous reptile fossils from Hokkaido. Memoirs of the National Science Museum 5:213-222 [R. Butler/R. Butler/R. Butler]

Secondary references:

33379 M. W. Caldwell and T. Konishi. 2007. Taxonomic re-assignment of the first-known mosasaur specimen from Japan, and a discussion of circum-Pacific mosasaur paleobiogeography. Journal of Vertebrate Paleontology 27(2):517-520 [M. Carrano/H. Street]