North of Yuasamachi: Late Barremian, Japan

List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
Cephalopoda - Nautilida - Cenoceratidae
Heminautilus lallierianus in Obata & Ogawa, 1976 (1 measurement)
see common names

Geography
Country:Japan
Coordinates: 34.1° North, 135.2° East (view map)
Paleocoordinates:43.4° North, 143.2° East (Wright 2013)
Basis of coordinate:estimated from map
Geographic resolution:outcrop
Time
Period: Cretaceous Epoch: Early Cretaceous
Stage: Barremian 10 m.y. bin: Cretaceous 2
Key time interval: Late Barremian Ammonoid zone:  Imerites giraudi
Age range of interval: 125.77 - 121.4 m.y. ago
Stratigraphy
Formation:Arida
Stratigraphic resolution:group of beds
Stratigraphy comments: Uppermost part delivered Heteroceras aff. astieri ORBIGNY, 1851. It is contemporary with specimens attributed to Anahamulina cf. subcylindrica (ORBIGNY, 1850) (OBATA & OGAWA, 1976, Pl. 4, figs. 9a-b, 10) but which are probably fragmentary representatives of Heteroceras ORBIGNY, 1849. Consequently this specimen comes certainly from the uppermost part of the Late Barremian (=Imerites giraudi Zone?).
Lithology and environment
Primary lithology: lithified "siliciclastic"
Environment:marine indet.
Taphonomy
Modes of preservation:body
Size of fossils:macrofossils
Collection methods and comments
Reason for describing collection:taxonomic analysis
Metadata
Database number:181259
Authorizer:M. Clapham Enterer:M. Clapham
Research group:marine invertebrate
Created:2016-08-30 22:37:23 Last modified:2025-02-22 15:12:02
Access level:the public Released:2016-08-30 22:37:23
Creative Commons license:CC0
Reference information

Primary reference:
60020. C. Baudouin, G. Delanoy, J. A. Moreno-Bedmar, A. Pictet, J. Vermeulen, G. Conte, R. Gonnet, P. Boselli, and M. Boselli. 2016. Revision of the Early Cretaceous genera Heminautilus Spath, 1927, and Josanautilus Martínez & Grauges, 2006 (Nautilida, Cenoceratidae). Carnets de Géologie 16(5):61-212 [M. Clapham/M. Clapham]