Sphaerirhynchia Comm., Leintwardine Grp., Wales and Welsh Borderland: Ludfordian, United Kingdom

List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
unclassified
Mespholidostrophia spp.
Bivalvia - Lucinida - Mactromyidae
Paracyclas sp. Hall 1843
Bivalvia - Grammysiidae
Fuchsella amygdalina (Sowerby 1827)
Bivalvia
Pelecypoda indet. Goldfuss 1820
synonym of Bivalvia
Strophomenata - Strophomenida
Strophochonetes sp. Muir-Wood 1962
Strophomenata - Strophomenida - Strophochonetidae
Protochonetes minumus
Protochonetes ludloviensis Muir-Wood 1962
Shagamella sp. Boucot and Harper 1968
Strophomenata - Strophomenida - Strophonellidae
Strophoprion sp. Twenhofel 1914
synonym of Strophonella
Strophomenata - Strophomenida - Amphistrophiidae
Amphistrophiella spp.
spelled with current rank as Amphistrophia (Amphistrophiella)
Strophomenata - Strophomenida - Leptostrophiidae
Leptostrophia (Leptostrophiella) filosa (Sowerby 1839)
recombined as Mesoleptostrophia filosa
Strophomenata - Strophomenida - Rafinesquinidae
Leptaena spp.
Rhynchonellata - Pentamerida - Gypidulidae
Gypidula sp. Hall 1867
Rhynchonellata - Orthida - Dalmanellidae
Isorthis sp. Kozlowski 1929
Rhynchonellata - Orthida - Draboviidae
Salopina sp. Boucot 1960
Rhynchonellata - Spiriferida - Delthyrididae
Howellella spp.
Rhynchonellata - Athyridida - Rhynchospirinidae
Homoeospira sp. Hall and Clarke 1893
Rhynchonellata - Athyridida - Meristellidae
Whitfieldella sp. Hall and Clarke 1893
Rhynchonellata - Athyridida - Nucleospiridae
Nucleospira sp. Hall 1859
Rhynchonellata - Athyridida - Dayiidae
Dayia sp. Davidson 1881
Rhynchonellata - Atrypida - Atrypidae
Atrypa sp. Dalman 1828
Rhynchonellata - Rhynchonellida - Trigonirhynchiidae
Microsphaeridiorhynchus nucula (Sowerby 1839)
Trigonirhynchia sp. Cooper 1942
Rhynchonellata - Rhynchonellida - Hebetoechiidae
Sphaerirhynchia wilsoni (de Sowerby 1816)
Lingulata - Lingulida - Lingulidae
Lingula sp. Bruguiére 1797
Lingulata - Lingulida - Discinidae
Orbiculoidea sp. d'Orbigny 1847
Craniata - Craniopsida - Craniopsidae
Craniops sp. Hall 1859
see common names

Geography
Country:United Kingdom State/province:England
Coordinates: 52.0° North, 3.0° West (view map)
Paleocoordinates:26.2° South, 12.5° West
Geographic resolution:basin
Time
Period:Silurian Epoch:Ludlow
Stage:Ludfordian 10 m.y. bin:Silurian 2
*International age/stage:Early/Lower Ludfordian
Key time interval:Ludfordian
Age range of interval:425.60000 - 423.00000 m.y. ago
* legacy (obsolete) database fields
Stratigraphy
Formation:Lower Leintwardine
Stratigraphic resolution:formation
Stratigraphy comments: Leintwardine Group, but nearly all samples from thicker Lower Leintwardine Formation. Appearing earlier along the Towy Anticline.
Lithology and environment
Primary lithology: "siliciclastic"
Lithology description: Ref. 6661: [No lithologic description. See geology comments.] Ref. 6660: "clastic sediments"
Environment:marine indet.
Geology comments: "C&H regard as depth equivalent of the Pentamerus Comm. of the upper Llandovery. The overall fauna suggests a BA 3 assignment."
Taphonomy
Modes of preservation:body
Size of fossils:mesofossils
Collection methods and comments
Collection excludes:some macrofossils
Reason for describing collection:paleoecologic analysis
Collection method comments: Based on Calef and Hancock 1974 (ref. 6660). Abundance data are given, but only brachiopods are treated in detail. This is similar to PBDB coll. 479, but that collections are not identical.
Metadata
Database number:23184
Authorizer:M. Foote Enterer:M. Foote
Modifier:M. Uhen Research group:marine invertebrate
Created:2002-07-10 10:11:22 Last modified:2018-11-26 18:15:39
Access level:the public Released:2002-07-10 10:11:22
Creative Commons license:CC BY
Reference information

Primary reference:
6661. J. D. Lawson. 1999. Calef and Hancock's Ludlow communities in Wales and the Welsh Borderland. In A. J. Boucot and J. D. Lawson (eds.), Paleocommunities--a case study from the Silurian and Lower Devonian 384-387 [M. Foote/M. Foote/M. Foote]

Secondary references:

6660 C. E. Calef and N. J. Hancock. 1974. Wenlock and Ludlow marine communities in Wales and the Welsh Borderland. Palaeontology 17(4):779-810 [M. Foote/M. Foote/J. Ju]