SB50: Rhuddanian - Aeronian, United Kingdom
List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
Lingulata
- Lingulida
|
||||||||||
Lingulacea indet.
Menke 1828
|
2 specimens | |||||||||
replaced by Linguloidea | ||||||||||
Strophomenata
- Strophomenida
- Sowerbyellidae
|
||||||||||
Eoplectodonta duplicata
(de Sowerby and Murchison 1839)
|
1 specimen | |||||||||
recombined as Eoplectodonta (Eoplectodonta) duplicata | ||||||||||
Anisopleurella gracilis
(Jones 1928)
|
1 specimen | |||||||||
recombined as Kozlowskites gracilis | ||||||||||
Rhynchonellata
- Pentamerida
- Clorindidae
|
||||||||||
Clorindinae indet.
Rzhonsnitskaia 1956
|
2 specimens | |||||||||
Rhynchonellata
- Atrypida
- Atrypinidae
|
||||||||||
Plectatrypa tripartita
(de Sowerby and Murchison 1839)
|
1 specimen | |||||||||
recombined as Eospirigerina tripartita | ||||||||||
ssp. tripartita | ||||||||||
Rhynchonellata
- Atrypida
- Lissatrypidae
|
||||||||||
Meifodia prima
(Williams 1951)
|
10 specimens | |||||||||
ssp. indet. | ||||||||||
Rhynchonellata
- Rhynchonellida
- Rhynchotrematidae
|
||||||||||
Stegerhynchus pusillum
(de Sowerby and Murchison 1839)
|
2 specimens | |||||||||
Rhynchonellata
- Orthida
- Rhipidomellidae
|
||||||||||
Mendacella mullockiensis
(Davidson 1869)
|
4 specimens | |||||||||
"llandoveriana morph" | ||||||||||
Rhynchonellata
- Orthida
- Hesperorthidae
|
||||||||||
Dolerorthis ? gwalia
|
1 specimen | |||||||||
see common names |
Geography
Country: | United Kingdom | State/province: | Wales | County: | Powys |
Coordinates: | 52.7° North, 3.2° West (view map) | ||||
Paleocoordinates: | 35.0° South, 16.5° West | ||||
Basis of coordinate: | based on political unit | ||||
Geographic resolution: | small collection |
Time
Period: | Silurian | Epoch: | Llandovery |
10 m.y. bin: | Silurian 1 | ||
*Period: | Early/Lower Silurian | *Epoch: | Early/Lower Llandovery - Middle Llandovery |
*International age/stage: | Late/Upper Rhuddanian - Late/Upper Aeronian | ||
Key time interval: | Rhuddanian - Aeronian | ||
Age range of interval: | 443.80000 - 438.50000 m.y. ago | ||
* legacy (obsolete) database fields |
Stratigraphy
Stratigraphic resolution: | bed | ||||
Stratigraphy comments: Unless a conodont zone was explicitly stated, a Late Rhudd - Late Aeron age was entered because of the statement these beds are all "pre-sedgwickii Zone." |
Lithology and environment
Primary lithology: | lithified mudstone |
Secondary lithology: | sandstone |
Environment: | marine indet. |
Taphonomy
Collection methods and comments
Collection excludes: | some macrofossils |
Collection methods: | bulk,field collection |
Reason for describing collection: | taxonomic analysis |
Collection method comments: "... a single collection (from bulk material) [was made] from each locality, identifying and recording all fossils encountered during break up of the rock... [sacrificing commoner taxa in continued searching, or preserving rarer specimens and not breaking the rock further]...figures obtained for relative frequencies of the taxa are prob accurate...estimates of volumetric abundance...are prob too low." Sample: 400 mm, 9.5 kg | |
Taxonomic list comments:"Brachiopods... form the overwhelming preponderance of early Llandovery shelly faunas in Wales." |
Metadata
Database number: | 4944 | ||
Authorizer: | J. Alroy | Enterer: | M. Sommers |
Modifier: | C. Visaggi | Research group: | marine invertebrate |
Created: | 1999-08-26 16:44:00 | Last modified: | 2004-03-11 16:25:07 |
Access level: | the public | Released: | 2000-11-20 13:53:24 |
Creative Commons license: | CC BY |
Reference information
Primary reference:
196. | J. T. Temple. 1987. Early Llandovery brachiopods of Wales. Palaeontological Society Monographs 139(572):1-137 [J. Alroy/M. Sommers/M. Uhen] |