Ammonites from northwestern Hokkaido: Turonian, Japan

List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
unclassified
Mesopuziosa sp.
Bivalvia - Myalinida - Inoceramidae
Inoceramus teshioensis Nagao and Matsumoto 1939
Cephalopoda - Ammonitida - Diplomoceratidae
Neocrioceras dentatum n. sp.
Cephalopoda - Ammonitida - Tetragonitidae
Gaudryceras denseplicatum (Jimbo 1894)
recombined as Gaudryceras (Gaudryceras) denseplicatum
Cephalopoda - Ammonitida - Kossmaticeratidae
Yokoyamaoceras aff. kotoi
see common names

Geography
Country:Japan State/province:Hokkaido
Coordinates: 45.0° North, 142.0° East (view map)
Paleocoordinates:53.0° North, 134.1° East
Basis of coordinate:estimated from map
Geographic resolution:small collection
Time
Period:Cretaceous Epoch:Late/Upper Cretaceous
Stage:Turonian 10 m.y. bin:Cretaceous 6
Key time interval:Turonian
Age range of interval:93.90000 - 89.80000 m.y. ago
Stratigraphy
Stratigraphic resolution:bed
Stratigraphy comments: probably upper Turonian
Lithology and environment
Primary lithology: calcareous siltstone
Environment:marginal marine indet.
Taphonomy
Modes of preservation:body,mold/impression
Size of fossils:macrofossils
Preservation of anatomical detail:good
Collection methods and comments
Collection methods:field collection
Reason for describing collection:taxonomic analysis
Metadata
Database number:38519
Authorizer:M. Aberhan Enterer:S. Nurnberg
Modifier:S. Nurnberg Research group:marine invertebrate
Created:2004-04-23 05:00:34 Last modified:2004-04-23 08:00:34
Access level:the public Released:2004-07-23 05:00:34
Creative Commons license:CC BY
Reference information

Primary reference:
10330.1% T. Matsumoto and I. Obata. 1981. Studies of Cretaceous ammonites from Hokkaido; XLI, A new heteromorph ammonite from Hokkaido in the collection of Yoshitaro Kawashita. Bulletin of the National Science Museum, Series C: Geology & Paleontology 7(3):115-118 [M. Aberhan/S. Nurnberg/S. Nurnberg]