Localities 1 and 2, H. parvifrons zone, Porth y rhaw, Dyfed: Menevian, United Kingdom

List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
Hexactinellida - Reticulosa - Protospongiidae
Protospongia sp. Salter 1864
Stylophora - Cornuta
Protocystites menevensis Hicks 1872
Agnostida - Peronopsidae
Peronopsis scutalis
Peronopsis scutalis scutalis
Peronopsis fallax (Linnarsson 1869)
Peronopsis fallax depressa
Agnostida - Spinagnostidae
Cotalagnostus lens (Grönwall 1902)
sensu latu
Agnostida - Ptychagnostidae
Ptychagnostus davidis
Ptychagnostus ciceroides
Ptychagnostus punctuosus (Angelin 1851)
Ptychagnostus punctuosus affinis
Agnostida - Eodiscidae
Eodiscus punctatus
Eodiscus punctatus punctatus
Agnostida - Pagetiidae
Pagetiidae indet. Kobayashi
Trilobita - Corynexochida - Corynexochidae
Acontheus sp. Angelin 1852
Trilobita - Redlichiida - Centropleuridae
Centropleuridae indet. Angelin 1854
Trilobita - Ptychopariida - Conocoryphidae
Conocoryphidae indet. Angelin 1854
Trilobita - Ptychopariida - Solenopleuridae
Jincella applanata
Trilobita - Holocephalinidae
Meneviella cf. venulosa
Ostracoda - Leperditicopida - Leperditiidae
Leperditia hicksi
Lingulata - Acrotretida - Acrotretidae
Linnarssonia sagittalis (Salter 1865)
recombined as Acrotreta sagittalis
Hyolithida - Hyolithidae
Hyolithes sp. d'Eichwald 1840
Hyolithes corrugatus
see common names

Geography
Country:United Kingdom State/province:Wales County:Pembrokeshire
Coordinates: 51.9° North, 5.2° West (view map)
Paleocoordinates:84.0° South, 40.9° West
Basis of coordinate:estimated from map
Geographic resolution:small collection
Time
Period:Cambrian Epoch:Miaolingian
10 m.y. bin:Cambrian 4
Key time interval:Menevian Trilobite zone: Hypagnostus parvifrons
Age range of interval:504.50000 - 499.50000 m.y. ago
Stratigraphy
Geological group:Porth-y-rhaw Formation:Menevia
Stratigraphic resolution:group of beds
Stratigraphy comments: Faunal reported from 12.5-24 m below top of unit, middle Menevian Group. Locality 1 (eastern side of harbour) is the type section of the Menevian Group, middle part of H. parvifrons zone, at shore level, stratigraphically c. 22-24 m below the basal contact of two, almost vertical, 4 m thick sills and approx. 10-12 m stratigraphically below the local base of the Ptychagnostus punctuosus zone. Locality 2 is on the western cliff section, at approximately the same horizon as locality 1. PJW: This was Menevian group, but this is now the Menevia formation within the Porth-y-rhaw group (Fletcher 2017).
Lithology and environment
Primary lithology:pyritic lithified mudstone
Lithology description: Cleaved pyritic mudstones with occasional thin, sometimes lenticular sandy horizons and several thing (<10 cm) pale beds ... composed of ashy material. Certain beds contain numerous small flattened phosphatic nodules.
Environment:deep-water indet.
Geology comments: Considered euxinic
Taphonomy
Modes of preservation:mold/impression,recrystallized,replaced with pyrite,replaced with limonite
Size of fossils:macrofossils
Collection methods and comments
Collection methods:field collection
Reason for describing collection:taxonomic analysis
Museum repositories:BMNH
Metadata
Database number:193782
Authorizer:P. Novack-Gottshall Enterer:P. Novack-Gottshall
Modifier:P. Wagner Research group:marine invertebrate
Created:2018-06-05 12:55:43 Last modified:2019-10-03 11:52:26
Access level:the public Released:2018-06-05 12:55:43
Creative Commons license:CC BY
Reference information

Primary reference:
65826. R. P. S. Jefferies, M. Lewis, and S. K. Donovan. 1987. Protocystites menevensis--a stem-group chordate (Cornuta) from the Middle Cambrian of South Wales. Palaeontology 30(3):429-484 [P. Novack-Gottshall/P. Novack-Gottshall/P. Novack-Gottshall]