Where: Wales, United Kingdom (53.3° N, 4.3° W: paleocoordinates 65.0° S, 18.3° W)

• coordinate based on nearby landmark

• small collection-level geographic resolution

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

• "upper Arenig... uppermost metre of the 5 m exposed... shell beds as much as 10 cm thick"

• group of beds-level stratigraphic resolution

Environment/lithology: open shallow subtidal; sandstone and fine-grained conglomerate

Size class: macrofossils

Preservation: cast, mold/impression

Collection methods: bulk, hydrochloric,

• new collection from 1971

•part of the sample, from less weathered sediment, was "decalcified in hydrochloric acid"

Primary reference: R. B. Neuman and D. E. B. Bates. 1978. Reassessment of Arenig and Llanvirn age (early Ordovician) brachiopods from Anglesey, north-west Wales. Palaeontology 21(3):571-613 [J. Alroy/J. Alroy]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 69096: authorized by John Alroy, entered by John Alroy on 18.02.2007

Creative Commons license: CC BY (attribution)