Hercynella gigantea Community, Early Emsian, Polar Urals: Early/Lower Emsian, Russian Federation
List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
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Anthozoa
- Favositida
- Favositidae
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Squameofavosites sp.
Chernyshev 1941
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Favosites stellaris
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Pachyfavosites sp.
Sokolov 1952
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Crinoidea
- Cyathocrinida
- Cupressocrinitidae
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Cupressocrinites sp.
Goldfuss 1831
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| includes crowns | ||||||||||
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Crinoidea
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Cyclocyclicus sp.
Yeltysheva 1955
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Pentagonocyclicus sp.
Yeltysheva and Shevchenko 1960
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Gastropoda
- Murchisoniina
- Palaeozygopleuridae
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Palaeozygopleura sp.
Horný 1955
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Bivalvia
- Cyrtodontida
- Antipleuridae
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Hercynella gigantea
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Hercynella polaris
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Hercynella comiensis
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Hercynella plana
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Hercynella parvula
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Hercynella sp.
Kayser 1878
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Cephalopoda
- Orthocerida
- Orthoceratidae
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Orthoceratidae indet.
M'Coy 1844
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Cephalopoda
- Pseudorthocerida
- Pseudorthoceratidae
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Pseudorthoceratidae indet.
Flower and Caster 1935
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Cephalopoda
- Pseudorthocerida
- Spyroceratidae
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Spyroceras crotalum
(Hall 1879)
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Xiphosura
- Xiphosurida
- Belinuridae
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Belinurus sp.
Bronn 1839
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| see common names | ||||||||||
Geography
| Country: | Russian Federation |
| Coordinates: | 67.0° North, 65.0° East (view map) |
| Paleocoordinates: | 6.3° North, 6.3° East |
| Basis of coordinate: | based on nearby landmark |
| Geographic resolution: | local area |
Time
| Period: | Devonian | Epoch: | Early/Lower Devonian |
| Stage: | Emsian | 10 m.y. bin: | Devonian 2 |
| *International age/stage: | Early/Lower Emsian | ||
| Key time interval: | Early/Lower Emsian | ||
| Age range of interval: | 407.60000 - 398.30000 m.y. ago | ||
| * legacy (obsolete) database fields | |||
Stratigraphy
| Stratigraphic resolution: | bed | ||||
| Stratigraphy comments: Late Early Emsian. | |||||
Lithology and environment
| Primary lithology: | shelly/skeletal "limestone" |
| Includes fossils? | Y |
| Lithology description: "Occurs in a 3 m thick, algal-coral, organogenic and bioclastic crinoidal limestone patch directly overlying reef limestone belonging to the Fistulella-Ikella Community." | |
| Environment: | perireef or subreef |
| Geology comments: "[Occurrence] indicates that the H. Community formed after the cessation of reef activity, and is a level bottom rather than a reef community. The [specimens] form unevently distributed banks [0.3 to 0.5 m thick and 1-3 m long.] [Most specimens disarticulated.] Condition of ...shells suggests quiet water conditions near wave base, and an assignment to BA 4 is made. It is concluded that bioherm formation ceased, following which there was some basin deepening consequent with the establishement of the H. Community." | |
Taphonomy
Collection methods and comments
| Reason for describing collection: | paleoecologic analysis |
Metadata
| Also known as: | Reef 2249 | ||
| Database number: | 24775 | ||
| Authorizer: | M. Foote | Enterer: | M. Foote |
| Modifier: | U. Merkel | Research group: | marine invertebrate |
| Created: | 2002-08-20 07:10:09 | Last modified: | 2008-07-02 05:29:54 |
| Access level: | the public | Released: | 2002-08-20 07:10:09 |
| Creative Commons license: | CC BY | ||
Reference information
Primary reference:
| 6753. | V. P. Sapelnikov, O. V. Bogoyavlenskaya, L. I. Mizens and V. P. Shuysky. 1999. Silurian and Early Devonian benthic communities of the Ural-Tien Shan region. In A. J. Boucot and J. D. Lawson (eds.), Paleocommunities--a case study from the Silurian and Lower Devonian 510-544 [M. Foote/M. Foote/M. Foote] |