Rushton Branch, Dryton Brook (Cambrian of the United Kingdom)

Also known as Cobbold and Pocock 1934 Locality 9

Where: Shropshire, United Kingdom (52.0° N, 2.0° W: paleocoordinates 85.8° S, 33.1° W)

• coordinate stated in text

• outcrop-level geographic resolution

When: Paradoxides intermedius Grit Member (Upper Comley Sandstone Formation), St Davids (509.0 - 497.0 Ma)

• member-level stratigraphic resolution

Environment/lithology: shoreface; calcareous sandstone

• The basal grit

•bed is calcareous in places and contains pebbles and abundant

•rounded quartz grains. Locally it is highly fossiliferous, and

•many of the fossils, notably the larger trilobites, were already

•in fragmentary condition when deposited.

• The basal grit

•bed is calcareous in places and contains pebbles and abundant

•rounded quartz grains. Locally it is highly fossiliferous, and

•many of the fossils, notably the larger trilobites, were already

•in fragmentary condition when deposited.

Size class: macrofossils

Reposited in the BMNH

Collection methods: bulk, chemical, acetic,

• Some material also held at the British Geological Survey, Keyworth

Primary reference: A. W. A. Rushton and V. Berg-Madsen. 2001. The age of the Middle Cambrian ‘Paradoxides forchhammeri Grit’ of the Wrekin district, Shropshire, England. Transactions of the Royal Society of Edinburgh 92:335-346 [A. McGowan/A. McGowan/M. Uhen]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 55509: authorized by Alistair McGowan, entered by Alistair McGowan on 28.10.2005

Creative Commons license: CC BY (attribution)

Taxonomic list

• Rushton 2001 revised the original list of Cobbold and Pocock 1934
Show authors, comments, and common names
Trilobita
 Olenida - Andrarinidae
"Liostracus pococki" = Andrarina
"Liostracus pococki" = Andrarina trilobite
 Ptychopariida - Alokistocaridae
? Elrathia angustiora
 Ptychopariida - Solenopleuridae
Solenopleura applanata, Solenopleura aff. brachymetopa, Solenopleura aff. conifrons, Solenopleura cf. nutia, Solenopleura spp.
Solenopleura spp. Angelin 1854 trilobite
 Redlichiida - Paradoxididae
Paradoxides sp., Paradoxides indet.
Paradoxides sp. Brongniart 1822 trilobite
Paradoxides indet. Brongniart 1822 trilobite
 Redlichiida - Agraulidae
Agaso rushtonensis, ? Agaso sp., Agaso bruno
? Agaso sp. Cobbold 1934 trilobite
Agaso bruno trilobite
 Corynexochida - Dorypygidae
Dorypyge rushtonensis
Artiopoda
 Agnostida - Spinagnostidae
Hypagnostus mammillatus, Cotalagnostus ? lens, Cotalagnostus lens
Cotalagnostus ? lens Grönwall 1902
Cotalagnostus lens Grönwall 1902
 Agnostida - Ptychagnostidae
Ptychagnostus hybridus