North Wales Rawtheyan Assemblage 4C, Crugan Mudstone, England: Rawtheyan, United Kingdom

List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
Trilobita - Phacopida - Calymenidae
Gravicalymene sp. Shirley 1936
Trilobita - Phacopida - Encrinuridae
Dindymene sp. Hawle and Corda 1847
Paracybeloides sp. Hupé 1955
Encrinuroides sp. Reed 1931
Trilobita - Phacopida - Cheiruridae
Pseudosphaerexochus sp. (Schmidt 1881)
Ceraurinella sp. Cooper 1953
Trilobita - Phacopida - Pterygometopidae
Liocnemis sp. Kielan 1960
Trilobita - Phacopida - Dalmanitidae
Duftonia sp. Dean 1959
Trilobita - Lichida - Lichidae
? Platylichas sp. (Gürich 1901)
originally entered as "Platylichas? sp."
Trilobita - Trinucleida - Dionididae
Dionide sp. Barrande 1847
Trilobita - Trinucleida - Trinucleidae
Nankinolithus sp. Lu 1957
Tretaspis sp. M'Coy 1849
Trilobita - Trinucleida - Raphiophoridae
Raphiophorus sp. Angelin 1854
Lonchodomas sp. Angelin 1854
Trilobita - Asaphida - Cyclopygidae
? Microparia sp. Hawle and Corda 1847
originally entered as "Microparia? sp."
Cyclopyge sp. Hawle and Corda 1847
Trilobita - Asaphida - Asaphidae
Opsimasaphus sp. Kielan 1960
Trilobita - Asaphida - Remopleurididae
Amphitryon sp. Hawle and Corda 1874
Trilobita - Corynexochida - Styginidae
Phillipsinella sp. Novak 1885
Trilobita - Corynexochida - Illaenidae
? Stenopareia sp. Holm 1886
originally entered as "Stenopareia? sp."
Trilobita - Corynexochida - Panderiidae
Panderia sp. Volborth 1863
Agnostida - Metagnostidae
Arthrorhachis sp. Hawle and Corda 1847
Strophomenata - Strophomenida - Foliomenidae
Foliomena sp. Havlicek 1952
Strophomenata - Strophomenida - Leptostrophiidae
Eostropheodonta sp. Bancroft 1949
Strophomenata - Strophomenida - Christianiidae
Christiania sp. Hall and Clarke 1892
Strophomenata - Strophomenida - Hesperomenidae
? Anoptambonites sp. Williams 1962
originally entered as "Anoptambonites? sp."
Strophomenata - Strophomenida - Leptestiidae
Leangella sp. Opik 1933
Leptestiina sp. Opik 1933
Rhynchonellata - Atrypida - Anazygidae
? Zygospira sp. Hall 1862
originally entered as "Zygospira? sp."
Rhynchonellata - Orthida - Dalmanellidae
Dedzetina sp.
Lingulata - Lingulida - Discinidae
Orbiculoidea sp. d'Orbigny 1847
Scyphozoa - Conulariida
Conulariida indet. Miller and Gurley 1896
see common names

Geography
Country:United Kingdom State/province:England
Coordinates: 53.0° North, 4.0° West (view map)
Paleocoordinates:45.6° South, 17.8° West
Geographic resolution:local area
Time
Period: Ordovician Epoch: Late Ordovician
Stage: Katian 10 m.y. bin: Ordovician 5
*Period:Late/Upper Ordovician *Epoch:Middle Ashgill
*International age/stage:Rawtheyan
Key time interval: Rawtheyan
Age range of interval: 448.9 - 445.2 m.y. ago
* legacy (obsolete) database fields
Stratigraphy
Formation:Crugan Mudstone
Stratigraphic resolution:formation
Lithology and environment
Primary lithology:burrows,gray,red or brown lithified "shale"
Environment:submarine fan
Geology comments: Brown-grey, campact ludstone with some Chondrites and mottling
Taphonomy
Collection methods and comments
Reason for describing collection:paleoecologic analysis
Metadata
Database number:3666
Authorizer:A. Miller Enterer:P. Novack-Gottshall
Research group:marine invertebrate
Created:1999-08-06 11:58:02 Last modified:1999-08-06 14:58:02
Access level:the public Released:2000-11-20 13:53:20
Creative Commons license:CC BY
Reference information

Primary reference:
170. D. Price. 1981. Ashigill trilobite faunas from the Llyn Peninsula, North Wales, U.K. Geological Magazine 16(3):201-216 [A. Miller/P. Novack-Gottshall]