Pontyfeni Fm, S. abyfrons biozone, Whitland, UK (Ordovician of the United Kingdom)

Where: England, United Kingdom (52.0° N, 5.0° W: paleocoordinates 66.0° S, 20.5° W)

• local area-level geographic resolution

When: Pontyfenni Formation, Arenig (478.6 - 466.0 Ma)

• formation-level stratigraphic resolution

Environment/lithology: marine; lithified shale and chert

• Dark mudstone with siliceous nodules; deep (> 200 m) but oxygenated setting with blind trilobites

Primary reference: R. A. Fortey and R. M. Owens. 1978. Early Ordovician (Arenig) stratigraphy and faunas of the Carmarthen District, southwest Wales. Bulletin of the British Museum of Natural History (Geology) 30(3):225-294 [A. Miller/P. Novack-Gottshall/P. Wagner]more details

Purpose of describing collection: biostratigraphic analysis

PaleoDB collection 3705: authorized by Arnold Miller, entered by Phil Novack-Gottshall on 07.08.1999

Creative Commons license: CC BY (attribution)

Taxonomic list

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Artiopoda
 Agnostida - Metagnostidae
? Arthrorhachis sp., "Segmentagnostus sp." = Corrugatagnostus
? Arthrorhachis sp. Hawle and Corda 1847
originally entered as "Arthrorhachis? sp."
"Segmentagnostus sp." = Corrugatagnostus Kobayashi 1939
Trilobita
 Trinucleida - Trinucleidae
Stapeleyella sp.
Stapeleyella sp. Whittard 1955 trilobite
 Asaphida - Cyclopygidae
Ellipsotaphrus sp.
Ellipsotaphrus sp. Whittard 1952 trilobite
 Ptychopariida - Shumardiidae
Shumardia sp.
Shumardia sp. Billings 1862 trilobite
 Phacopida - Encrinuridae
Dindymene sp.
Dindymene sp. Hawle and Corda 1847 trilobite
Pterobranchia
 Graptoloidea - Dichograptidae
Didymograptus sp.
Didymograptus sp. McCoy 1851 graptolite
Stylophora
 Mitrata -
Mitrocystites sp.
 Cornuta - Hanusiidae
Reticulocarpos sp.
 Cornuta - Cothurnocystidae
Cothurnocystis sp.
Cothurnocystis sp. Bather 1913