East of Wenallt (Ordovician of the United Kingdom)

Where: Wales, United Kingdom (51.8° N, 3.6° W: paleocoordinates 39.1° S, 17.0° W)

• small collection-level geographic resolution

When: Ooid Member (Wenallt Formation), Hirnantian (445.2 - 443.4 Ma)

• member-level stratigraphic resolution

Environment/lithology: offshore; lithified, ooidal, shelly/skeletal, argillaceous, sandy siltstone and sandstone

• sandy and muddy siltstones with ooids alternating with fine to very fine speckly sandstones. abundant fragmentary pelmatozoan and bryozoan material.

Primary reference: 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]more details

Purpose of describing collection: biostratigraphic analysis

PaleoDB collection 8383: authorized by John Alroy, entered by Mike Sommers on 10.07.2000

Creative Commons license: CC BY (attribution)

Taxonomic list

Show authors, comments, and common names
Anthozoa
 Rugosa -
Rugosa indet.
Rugosa indet. horn coral
solitary rugose coral
unclassified
  -
Echinodermata indet., Pelmatozoa indet.
Echinodermata indet. Klein 1754
quadrate ossicles
Pelmatozoa indet. Leuckart 1848
pelmatozoan ossicles
Crinoidea
  -
Crinoidea indet.
Crinoidea indet. Miller 1821 Sea lily
ossicles
Bryozoa
  -
Bryozoa indet.
Bryozoa indet. Ehrenberg 1831
Stenolaemata
 Trepostomata -
Trepostomata indet.
Trepostomata indet. Ulrich 1882
trepostome
 Cryptostomata -
Cryptostomata indet.
Cryptostomata indet. Vine 1884
cryptostome
 Cryptostomata - Escharoporidae
Escharopora sp.
Escharopora sp. Hall 1847
Hyolitha
  -
Hyolitha indet.
Hyolitha indet. Marek 1963
hyolith
Rhynchonellata
 Protorthida - Skenidiidae
? Skenidioides sp.
? Skenidioides sp. Schuchert and Cooper 1931
 Orthida - Draboviidae
? Hirnantia sp., Hirnantia sagittifera
? Hirnantia sp. Lamont 1935
 Orthida - Dalmanellidae
Dalmanellidae indet., Dalmanella testudinaria
Dalmanellidae indet. Schuchert 1913
dalmanellid
 Orthida - Glyptorthidae
Glyptorthis sp.
Glyptorthis sp. Foerste 1914
 Orthida - Hesperorthidae
Dolerorthis sp.
Dolerorthis sp. Schuchert and Cooper 1931
 Orthida - Plectorthidae
Plectorthis sp.
Plectorthis sp. Hall and Clarke 1892
 Atrypida - Atrypidae
Atrypidae indet.
Atrypidae indet. Gill 1871
costate atrypid
 Athyridida - Meristellidae
? Hindella sp.
? Hindella sp. Davidson 1882
Strophomenata
 Strophomenida - Rafinesquinidae
Leptaena sp.
Leptaena sp. Dalman 1828
 Strophomenida - Leptostrophiidae
Eostropheodonta hirnantensis
 Strophomenida - Leptellinidae
Leptellinidae indet.
Leptellinidae indet. Ulrich and Cooper 1936
leptellinid
 Strophomenida - Leptestiidae
? Sampo sp.
? Sampo sp. Opik 1933
 Strophomenida - Sowerbyellidae
Sowerbyellidae indet.
Sowerbyellidae indet. Opik 1930
sowerbyellid
 Orthotetida - Triplesiidae
Triplesia sp.
Triplesia sp. Hall 1859
Craniata
 Craniopsida - Craniopsidae
Paracraniops sp.
Paracraniops sp. Williams 1963
Trilobita
 Phacopida - Dalmanitidae
? Dalmanitidae indet.
? Dalmanitidae indet. Vogdes 1890 trilobite
dalmanitid
Ostracoda
 Podocopa -
Palaeocopida indet.
Palaeocopida indet. Henningsmoen 1953 ostracod
reticulate palaeocope