West flank of east of Wenallt 4 (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: Speckly Sandstone Member (Wenallt Formation), Hirnantian (445.2 - 443.4 Ma)

• member-level stratigraphic resolution

Environment/lithology: offshore; lithified, burrowed, pebbly, brown, gray, blue, calcareous sandstone

• blue-grey, finely crossbedded and evenly laminar calcareous sandstones weathering with chocolate brown tinges. mud flasers; burrows; pebbles rarely occur.

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 8404: authorized by John Alroy, entered by Mike Sommers on 11.07.2000

Creative Commons license: CC BY (attribution)

Taxonomic list

Show authors, comments, and common names
unclassified
  -
Leptaeidae indet., Pelmatozoa indet.
Pelmatozoa indet. Leuckart 1848
pelmatozoan ossicles
Cystoidea
  -
Cystoidea indet.
Cystoidea indet. von Buch 1846
cystoid plates
Crinoidea
  -
Crinoidea indet.
Crinoidea indet. Miller 1821 Sea lily
ossicles
Bivalvia
  -
? Bivalvia indet.
? Bivalvia indet. Linnaeus 1758 clam
Craniata
 Craniopsida - Craniopsidae
Paracraniops sp.
Paracraniops sp. Williams 1963
Strophomenata
 Orthotetida - Triplesiidae
Cliftonia sp.
Cliftonia sp. Foerste 1909
 Strophomenida - Leptestiidae
Leangella sp.
Leangella sp. Opik 1933
 Strophomenida -
"? Plectambonitacea indet." = Plectambonitoidea
"? Plectambonitacea indet." = Plectambonitoidea Jones 1928
said to be a new genus
 Strophomenida - Leptellinidae
Leptellinidae indet.
Leptellinidae indet. Ulrich and Cooper 1936
leptellinid
 Strophomenida - Leptostrophiidae
Eostropheodonta hirnantensis
 Strophomenida -
"Strophomenacea indet." = Strophomenoidea
"Strophomenacea indet." = Strophomenoidea King 1846
strophomenacean
Rhynchonellata
 Orthida - Draboviidae
? Hirnantia sp., ? Kinnella sp.
? Hirnantia sp. Lamont 1935
? Kinnella sp. Bergström 1968
 Orthida - Dicoelosiidae
? Dicoelosia sp.
? Dicoelosia sp. King 1850
 Orthida - Dalmanellidae
Dalmanellidae indet.
Dalmanellidae indet. Schuchert 1913
dalmanellid
 Orthida - Productorthidae
? Nicolella sp.
? Nicolella sp. Reed 1917
 Orthida -
"Orthacea indet." = Orthoidea
"Orthacea indet." = Orthoidea Woodward 1852
orthacean
 Orthida - Platystrophiidae
Platystrophia sp.
 Athyridida - Meristellidae
Hindella incipiens
Hindella incipiens Williams 1951
 Rhynchonellida -
Rhynchonellida indet.
Rhynchonellida indet. Kuhn 1949
rhynchonellide
Hyolitha
 Orthothecida - Orthothecidae
Orthothecidae indet.
Orthothecidae indet. Syssoiev 1957
orthothecid
Bryozoa
  -
Bryozoa indet.
Bryozoa indet. Ehrenberg 1831
Stenolaemata
 Cryptostomata -
Cryptostomata indet.
Cryptostomata indet. Vine 1884
cryptostome
Deuteropoda
  -
Ostracoda indet.
Ostracoda indet. Latreille 1802 ostracod
Trilobita
  -
Trilobita indet.
Trilobita indet. Walch 1771 trilobite