Pont des Étoiles: Late/Upper Bajocian - Early/Lower Bathonian, France
collected by H. Hess 1950
List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
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unclassified
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Brachiopoda indet.
Cuvier 1805
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Crinoidea
- Cyrtocrinida
- Eugeniacrinitidae
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Lonchocrinus dumortieri
(de Loriol 1882)
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2 specimens | |||||||||
| 2 cups | ||||||||||
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Crinoidea
- Cyrtocrinida
- Phyllocrinidae
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Scutellacrinus tenuis n. gen., n. sp.
Hess 2012
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1 specimen | |||||||||
| 1 cup | ||||||||||
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Phyllocrinus voultensis
Hess 2012
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2 specimens | |||||||||
| 2 cups | ||||||||||
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Crinoidea
- Cyrtocrinida
- Sclerocrinidae
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Cyrtocrinus praenutans
Hess 2012
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35 specimens | |||||||||
| 22 cups, 13 columnals | ||||||||||
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Crinoidea
- Isocrinida
- Pentacrinitidae
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Pentacrinites ausichi n. sp.
Hess 2012
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14 specimens | |||||||||
| 6 columnals, 5 cirrals, 3 secundibrachials | ||||||||||
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Crinoidea
- Isocrinida
- Isocrinidae
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Balanocrinus dumortieri
de Loriol 1887
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1 specimen | |||||||||
| 1 pluricolumnal | ||||||||||
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Balanocrinus inornatus
(d'Orbigny 1850)
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6 specimens | |||||||||
| 6 pluricolumnals | ||||||||||
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Balanocrinus pacomei
de Loriol 1887
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34 specimens | |||||||||
| 22 pluricolumnals, 12 columnals | ||||||||||
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Isocrinus nicoleti
(Desor 1845)
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| Large number of stems, cirri, and brachials | ||||||||||
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Isocrinus dumortieri
(Oppel 1865)
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7 specimens | |||||||||
| 7 pluricolumnals | ||||||||||
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Crinoidea
- Cyclocrinidae
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Cyclocrinus rugosus
(d'Orbigny 1841)
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4 specimens | |||||||||
| 4 columnals | ||||||||||
| see common names | ||||||||||
Geography
| Country: | France | State/province: | Auvergne-Rhône-Alpes | County: | Ardèche |
| Coordinates: | 44.8° North, 4.8° East (view map) | ||||
| Paleocoordinates: | 34.6° North, 15.2° East | ||||
| Basis of coordinate: | estimated from map | ||||
| Geographic resolution: | small collection |
Time
| Period: | Jurassic | Epoch: | Middle Jurassic |
| 10 m.y. bin: | Jurassic 4 | ||
| Key time interval: | Late/Upper Bajocian - Early/Lower Bathonian | Ammonoid zone: | Parkinsoni |
| Age range of interval: | 168.60000 - 165.30000 m.y. ago |
Stratigraphy
| Stratigraphic resolution: | group of beds | ||||
| Stratigraphy comments: Late Bajocian/Early Bathonian Parkinsoni/Zigzag Zones. | |||||
Lithology and environment
| Primary lithology: | "limestone" |
| Secondary lithology: | gray marl |
| Includes fossils? | Y |
| Lithology description: "Crinoidal limestones and marls" | |
| Environment: | platform/shelf-margin reef |
| Geology comments: "Almeras and Elmi (1996) assumed that the crinoid remains and the brachiopods were transported by currents or mass flows from adjoining platforms or swells and accumulated at the foot of the escarpment." | |
Taphonomy
| Modes of preservation: | body |
| Size of fossils: | macrofossils |
| Articulated whole bodies: | none |
| Fragmentation: | extreme |
Collection methods and comments
| Collection methods: | field collection | ||
| Collection size: | 100000 specimens | ||
| Rock censused: | 100 kg | ||
| Reason for describing collection: | taxonomic analysis | ||
| Collectors: | H. Hess | Collection dates: | 1950s |
| Collection method comments: Natural History Museum Basel (Switzerland). | |||
Metadata
| Database number: | 225718 | ||
| Authorizer: | P. Novack-Gottshall | Enterer: | P. Novack-Gottshall |
| Created: | 2022-05-25 12:09:57 | Last modified: | 2022-05-25 12:09:57 |
| Access level: | the public | Released: | 2022-05-25 12:09:57 |
| Creative Commons license: | CC BY |
Reference information
Primary reference:
| 81741. | H. Hess. 2012. Crinoids from the Middle Jurassic (Bajocian–Lower Callovian) of Arde`che, France. Swiss Journal of Palaeontology 131:121-253 [P. Novack-Gottshall/P. Novack-Gottshall] |