Sa 203, Sanchu area, upper Ishido Formation, Gunma: Late/Upper Barremian, Japan
List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
Hydrozoa
- Hydroida
- Chondroplidae
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Palaelophacmaea annulata
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Cephalopoda
- Phylloceratida
- Phylloceratidae
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? Calliphylloceras sp.
Spath 1927
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Phyllopachyceras aff. infundibulum
(d'Orbigny 1840)
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Cephalopoda
- Ammonitida
- Bochianitidae
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? Kabylites sp.
Durand Delga 1954
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Cephalopoda
- Ammonitida
- Desmoceratidae
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Barremites (Barremites) sp.
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Barremites (Barremites) aff. difficilis
(d'Orbigny 1840)
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Barremites (Barremites) aff. strettostoma
(Uhlig 1883)
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recombined as Barremitites strettostoma | ||||||||||
? Pseudohaploceras otsukai
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Cephalopoda
- Ammonitida
- Ancyloceratidae
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Acrioceras aff. tabarelli
(Astier 1851)
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Cephalopoda
- Ammonitida
- Heteroceratidae
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Heteroceras sp.
d'Orbigny 1849
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? Heteroceras sp.
d'Orbigny 1849
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Cephalopoda
- Ammonitida
- Acrioceratidae
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? Hamiticeras sp.
Anderson 1938
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? Lytocrioceras furcatum
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? Lytocrioceras sp.
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Cephalopoda
- Ammonitida
- Oppeliidae
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Aconeceras sp.
Hyatt 1903
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Cephalopoda
- Hamulinidae
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Anahamulina sp.
Hyatt 1900
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Anahamulina aff. subcylindrica
(d'Orbigny 1850)
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Cephalopoda
- Nautilida
- Nautilidae
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Cymatoceras aff. neocomiensis
(d'Orbigny 1840)
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recombined as Cymatoceras neocomiense | ||||||||||
Cephalopoda
- Nautilida
- Cenoceratidae
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Heminautilus japonicus n. sp.
Baudouin et al. 2016
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Baudouin et al. 2016 | |||||||||
Heminautilus cf. H. lallierianus in Obata et al., 1984 (1 measurement) | ||||||||||
see common names |
Geography
Country: | Japan |
Coordinates: | 36.1° North, 138.8° East (view map) |
Paleocoordinates: | 46.6° North, 140.8° East |
Basis of coordinate: | stated in text |
Geographic resolution: | outcrop |
Time
Period: | Cretaceous | Epoch: | Early/Lower Cretaceous |
Stage: | Barremian | 10 m.y. bin: | Cretaceous 2 |
Key time interval: | Late/Upper Barremian | ||
Age range of interval: | 130.00000 - 125.45000 m.y. ago |
Stratigraphy
Formation: | Ishido | ||||
Stratigraphic resolution: | group of beds | ||||
Stratigraphy comments: upper Ishido Formation |
Lithology and environment
Primary lithology: | lithified calcareous sandstone |
Lithology description: very fine-grained calcareous sandstone | |
Environment: | coastal indet. |
Glacial or sequence phase: | transgressive |
Taphonomy
Size of fossils: | macrofossils |
Collection methods and comments
Collection methods: | field collection |
Reason for describing collection: | taxonomic analysis |
Metadata
Database number: | 66079 | ||
Authorizer: | W. Kiessling, M. Clapham | Enterer: | U. Merkel, M. Clapham | Research group: | marine invertebrate |
Created: | 2006-09-28 05:01:16 | Last modified: | 2006-09-28 08:01:16 |
Access level: | the public | Released: | 2006-09-28 05:01:15 |
Creative Commons license: | CC BY |
Reference information
Primary reference:
18928. | G. D. Stanley, Jr. and Y. Kanie. 1985. The first mesozoic chondrophorine (medusoid hydrozoan) from the Lower Cretaceous of Japan. Palaeontology 28(1):101-109 [W. Kiessling/U. Merkel] |
Secondary references:
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] |