Road cut at Roman Rd., Pensarn (Ordovician of the United Kingdom)

Also known as locality 12

Where: Wales, United Kingdom (51.8° N, 4.3° W: paleocoordinates 68.7° S, 20.1° W)

• coordinate stated in text

• outcrop-level geographic resolution

When: Tetragraptus phyllograptoides graptolite zone, Bolahaul Member (Ogof Hen Formation), Moridunian (477.7 - 473.8 Ma)

• "Bolahaul Member, Ogof Hên Formation. Moridunian Stage, Arenig Series, phyllograptoides Biozone." (Evans, 2005)

• member-level stratigraphic resolution

Environment/lithology: offshore; silty mudstone

• "The silty mudstones of this quarry represent a nearshore environment" (Cope, 2005), refers to the Dan-lan-y-castell quarry, about 6 km WSW (PBDB coll. no. 89318).

Size class: macrofossils

Preservation: cast, mold/impression

Reposited in the BGS

Primary reference: D. H. Evans. 2005. The Lower and Middle Ordovician cephalopod faunas of England and Wales. Monograph of the Palaeontographical Society 623:1-81 [B. Kröger/B. Kröger/B. Kröger]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 89323: authorized by Björn Kröger, entered by Torsten Liebrecht on 16.05.2009, edited by Pete Wagner

Creative Commons license: CC BY (attribution)

Taxonomic list

Show authors, comments, and common names
Trilobita
 Asaphida - Asaphidae
"Ogygia murchisoniae n. sp." = Merlinia murchisoniae
"Ogygia murchisoniae n. sp." = Merlinia murchisoniae Murchison 1839 trilobite
Cephalopoda
 Ellesmerocerida - Eothinoceratidae
Saloceras sericeum
Saloceras sericeum Salter 1865
BGS (Geol. Soc. Coll.) 6961 (possibly the specimen figured as Polymeres demetarum in Murchison, 1839)
 Dissidocerida - Polymeridae
Polymeres demetarum n. gen. n. sp.
Polymeres demetarum n. gen. n. sp. Murchison 1839
BGS (Geol. Soc. Coll.) 6960 (type)