East of Wenallt #3: Hirnantian, United Kingdom
List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
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unclassified
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Problematica indet.
Andrews 1970
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2 specimens | |||||||||
| what else is new | ||||||||||
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Anthozoa
- Heliolitida
- Halysitidae
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Halysitidae indet.
Milne-Edwards and Haime 1849
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1 specimen | |||||||||
| halysitid | ||||||||||
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Anthozoa
- Rugosa
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Rugosa indet.
Milne-Edwards and Haime 1850
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2 specimens | |||||||||
| solitary rugose coral | ||||||||||
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unclassified
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Bryozoa indet.
Ehrenberg 1831
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46 specimens | |||||||||
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Stenolaemata
- Cyclostomata
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Cyclostomata indet.
Busk 1852
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1 specimen | |||||||||
| cyclostome | ||||||||||
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Stenolaemata
- Trepostomata
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Trepostomata indet.
Ulrich 1882
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6 specimens | |||||||||
| trepostome | ||||||||||
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Stenolaemata
- Cryptostomata
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Cryptostomata indet.
Vine 1884
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12 specimens | |||||||||
| cryptostome | ||||||||||
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unclassified
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Hyolitha indet.
Marek 1963
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1 specimen | |||||||||
| hyolith | ||||||||||
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Craniata
- Craniopsida
- Craniopsidae
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Paracraniops sp.
Williams 1963
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14 specimens | |||||||||
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Strophomenata
- Strophomenida
- Leptestiidae
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Sampo sp.
Opik 1933
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2 specimens | |||||||||
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Strophomenata
- Strophomenida
- Rafinesquinidae
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Leptaena sp.
Dalman 1828
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3 specimens | |||||||||
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Strophomenata
- Strophomenida
- Furcitellidae
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Katastrophomena sp.
Cocks 1968
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1 specimen | |||||||||
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Strophomenata
- Strophomenida
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Strophomenacea indet.
King 1846
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3 specimens | |||||||||
| strophomenacea | ||||||||||
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Strophomenata
- Strophomenida
- Leptostrophiidae
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Eostropheodonta hirnantensis
(M'Coy 1851)
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1 specimen | |||||||||
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Strophomenata
- Orthotetida
- Triplesiidae
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Cliftonia sp.
Foerste 1909
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6 specimens | |||||||||
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Rhynchonellata
- Rhynchonellida
- Rhynchotrematidae
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? Rhynchotrema sp.
Hall 1860
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1 specimen | |||||||||
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Rhynchonellata
- Orthida
- Dalmanellidae
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Dalmanellidae indet.
Schuchert 1913
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11 specimens | |||||||||
| dalmanellid | ||||||||||
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Dalmanella sp.
Hall and Clarke 1892
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3 specimens | |||||||||
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? Howellites sp.
(Bancroft 1945)
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1 specimen | |||||||||
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Rhynchonellata
- Orthida
- Draboviidae
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? Hirnantia sp.
Lamont 1935
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1 specimen | |||||||||
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Hirnantia sagittifera
(McCoy 1851)
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3 specimens | |||||||||
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? Kinnella sp.
Bergström 1968
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1 specimen | |||||||||
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Rhynchonellata
- Orthida
- Plectorthidae
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? Plectorthis sp.
Hall and Clarke 1892
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Rhynchonellata
- Orthida
- Platystrophiidae
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Platystrophia sp.
King 1850
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2 specimens | |||||||||
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Rhynchonellata
- Orthida
- Hesperorthidae
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? Ptychopleurella sp.
Schuchert and Cooper 1931
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1 specimen | |||||||||
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Dolerorthis sp.
Schuchert and Cooper 1931
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1 specimen | |||||||||
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Rhynchonellata
- Orthida
- Orthidae
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Orthambonites sp.
Pander 1830
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1 specimen | |||||||||
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Rhynchonellata
- Orthida
- Orthidiellidae
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? Portranella sp.
Wright 1964
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1 specimen | |||||||||
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Rhynchonellata
- Orthida
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Orthacea indet.
Woodward and Schuchert 1852
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3 specimens | |||||||||
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Rhynchonellata
- Orthida
- Glyptorthidae
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Glyptorthis sp.
Foerste 1914
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7 specimens | |||||||||
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Rhynchonellata
- Athyridida
- Meristellidae
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Hindella incipiens
(Williams 1951)
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13 specimens | |||||||||
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Gastropoda
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Gastropoda indet.
Cuvier 1795
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1 specimen | |||||||||
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Bivalvia
- Nuculida
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Nuculacea indet.
Gray 1824
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1 specimen | |||||||||
| nuculacean | ||||||||||
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unclassified
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? Diplonothis sp.
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1 specimen | |||||||||
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Trilobita
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Trilobita indet.
Walch 1771
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1 specimen | |||||||||
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Ostracoda
- Palaeocopida
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Palaeocopida indet.
Henningsmoen 1953
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4 specimens | |||||||||
| palaeocope, 1x reticulate palaeocope | ||||||||||
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unclassified
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Pelmatozoa indet.
Leuckart 1848
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49 elements | |||||||||
| pelmatozoan ossicles | ||||||||||
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Cystoidea
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Cystoidea indet.
von Buch 1846
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5 elements | |||||||||
| cystoid plates | ||||||||||
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Rhombifera
- Cheirocrinidae
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? Cheirocrinus sp.
Eichwald 1856
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1 element | |||||||||
| plate | ||||||||||
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Crinoidea
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Crinoidea indet.
Miller 1821
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12 elements | |||||||||
| ossicles | ||||||||||
| see common names | ||||||||||
Geography
| Country: | United Kingdom | State/province: | Wales |
| Coordinates: | 51.8° North, 3.6° West (view map) | ||
| Paleocoordinates: | 39.1° South, 17.0° West | ||
| Geographic resolution: | small collection |
Time
| Period: | Ordovician | Epoch: | Late Ordovician |
| Stage: | Hirnantian | 10 m.y. bin: | Ordovician 5 |
| *Period: | Late/Upper Ordovician | *Epoch: | Ashgill |
| Key time interval: | Hirnantian | ||
| Age range of interval: | 445.2 - 443.8 m.y. ago | ||
| * legacy (obsolete) database fields | |||
Lithology and environment
| Primary lithology: | ooidal,shelly/skeletal lithified argillaceous,sandy siltstone |
| Secondary lithology: | sandstone |
| Lithology description: sandy and muddy siltstones with ooids alternating with fine to very fine speckly sandstones. abundant fragmentary pelmatozoan and bryozoan material. | |
| Environment: | offshore |
Taphonomy
| Modes of preservation: | body |
Collection methods and comments
| Collection methods: | field collection |
| Reason for describing collection: | biostratigraphic analysis |
Metadata
| Database number: | 8387 | ||
| Authorizer: | J. Alroy | Enterer: | M. Sommers | Research group: | marine invertebrate |
| Created: | 2000-07-10 16:25:22 | Last modified: | 2000-07-10 19:25:22 |
| Access level: | the public | Released: | 2000-11-20 13:53:37 |
| Creative Commons license: | CC BY |
Reference information
Primary reference:
| 571. | A. Williams and A. D. Wright. 1981. The Ordovician-Silurian boundary in the Garth area of southwest Powys, Wales. Geological Journal 16:1-39 [J. Alroy/M. Sommers/P. Wagner] |