Acrospirifer-Atrypa Community, Shizhou Member, Yukiang Fm., Loc. ADH 13: Early/Lower Emsian, China
List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
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Rhynchonellata
- Athyridida
- Athyrididae
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Athyris grandis
Davidson 1862
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4 specimens | |||||||||
| recombined as Spirigerella grandis | ||||||||||
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Rhynchonellata
- Spiriferida
- Acrospiriferidae
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Acrospirifer medius
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49 specimens | |||||||||
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Elymospirifer sp.
Wang 1974
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6 specimens | |||||||||
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Rhynchonellata
- Spiriferida
- Echinospiriferidae
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Glyptospirifer chui
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1 specimen | |||||||||
| synonym of Howittia | ||||||||||
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Rhynchonellata
- Rhynchonellida
- Uncinulidae
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Uncinulus fasciger
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16 specimens | |||||||||
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Rhynchonellata
- Atrypida
- Atrypidae
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Atrypa sp.
Dalman 1828
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32 specimens | |||||||||
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Rhynchonellata
- Orthida
- Schizophoriidae
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Schizophoria sp.
King 1850
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78 specimens | |||||||||
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Strophomenata
- Strophomenida
- Dicoelostrophiidae
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Dicoelostrophia sp.
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9 specimens | |||||||||
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Strophomenata
- Strophomenida
- Douvillinidae
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Xenostrophia sp.
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13 specimens | |||||||||
| synonym of Nadiastrophia | ||||||||||
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Cymostrophia sp.
Caster 1939
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1 specimen | |||||||||
| genus name in quotes | ||||||||||
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Strophomenata
- Strophomenida
- Strophochonetidae
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Parachonetes sp.
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19 specimens | |||||||||
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Strophomenata
- Strophomenida
- Chonetidae
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cf. Chonetes sp.
Fischer de Waldheim 1830
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2 specimens | |||||||||
| " 'Chonetes' n. gen., small, coarse | ||||||||||
| see common names | ||||||||||
Geography
| Country: | China | State/province: | Guangxi |
| Coordinates: | 22.9° North, 108.9° East (view map) | ||
| Paleocoordinates: | 3.7° North, 125.9° East | ||
| Basis of coordinate: | based on political unit | ||
| 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
Lithology and environment
| Primary lithology: | mudstone |
| Includes fossils? | Y |
| Lithology description: "muddy matrix" | |
| Environment: | marine indet. |
| Geology comments: "The commonly articulated nature of the brachiopods, combined with the muddy matrix, suggests a relatively quiet-water environment. The high diversity is consistent with BA 3, as is the position above BA 2 communities and below another BA 3 community. May represent a somewhat nearer-shore BA 3 unit than does the overlying Huananochonetes-Xenostrophia Comm. " | |
Taphonomy
Collection methods and comments
| Reason for describing collection: | paleoecologic analysis |
| Collection method comments: Specimen counts given in table 1. | |
Metadata
| Database number: | 25728 | ||
| Authorizer: | M. Foote | Enterer: | M. Foote |
| Modifier: | M. Foote | Research group: | marine invertebrate |
| Created: | 2002-09-24 09:35:44 | Last modified: | 2006-09-15 15:14:05 |
| Access level: | the public | Released: | 2002-09-24 09:35:44 |
| Creative Commons license: | CC BY |
Reference information
Primary reference:
| 7183. | Y. Wang, A. J. Boucot, J.Y. Rong and X.C. Yang. 1987. Community paleoecology as a geologic tool: the Chinese Ashgillian-Eifelian (latest Ordovician through early Middle Devonian) as an example. Geological Society of America Special Paper 211:1-100 [M. Foote/M. Foote/M. Foote] |