350 m south of Mt Toyajo: Late Campanian - Early Maastrichtian, Japan
collected 2006, 2010−2011

List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
Osteichthyes - Mosasauridae
WMNH-Ge-1140240002 - holotype
see common names

Geography
Country:Japan State/province:Wakayama
Coordinates: 34.1° North, 135.2° East (view map)
Paleocoordinates:40.5° North, 128.5° East (Wright 2013)
Basis of coordinate:estimated from map
Geographic resolution:small collection
Time
Period: Cretaceous Epoch: Late Cretaceous
Stage: Campanian - Maastrichtian 10 m.y. bin: Cretaceous 7 - Cretaceous 8
Key time interval: Late Campanian - Early Maastrichtian
Age range of interval: 83.6 - 66 m.y. ago
Stratigraphy
Formation:Toyajo Member:Hasegawa Muddy Sandstone
Stratigraphic resolution:bed
Stratigraphy comments: near the top of Hasegawa Muddy Sandstone Member, Toyajo Formation
Lithology and environment
Primary lithology:very fine,fine muddy sandstone
Includes fossils?Y
Lithology description: muddy, very fine- to fine-grained sandstone
Environment:marine indet.
Taphonomy
Modes of preservation:body
Size of fossils:macrofossils
Collection methods and comments
Collection methods:field collection
Reason for describing collection:general faunal/floral analysis
Collection dates:2006, 2010−2011
Metadata
Database number:233344
Authorizer:P. Mannion Enterer:P. Mannion
Research group:vertebrate
Created:2024-02-05 07:57:26 Last modified:2025-02-22 15:12:02
Access level:the public Released:2024-02-05 07:57:26
Creative Commons license:CC0
Reference information

Primary reference:
87459. T. Konishi, M. Ohara, A. Misaki, H. Matsuoka, H. P. Street and M. W. Caldwell. 2023. A new derived mosasaurine (Squamata: Mosasaurinae) from south-western Japan reveals unexpected postcranial diversity among hydropedal mosasaurs. Journal of Systematic Palaeontology 21(1):2277921 [P. Mannion/P. Mannion]