Ribbed Atrypid-Rothpleztella/Girvanella Comm., Much Wenlock Lst. (Silurian of the United Kingdom)

Where: England, United Kingdom (52.0° N, 2.0° W: paleocoordinates 28.9° S, 12.7° W)

• coordinate based on political unit

• local area-level geographic resolution

When: Much Wenlock Formation, Homerian (430.5 - 427.4 Ma)

• ?ludensis zone

• formation-level stratigraphic resolution

Environment/lithology: marine; shelly/skeletal wackestone and shelly/skeletal packstone

• "...deposited in low energy restricted mid-shelf setting. Oncoid morphologies indicate low energy conditions but in shallow water...shells scattered within beds, commonly disarticulated but unabraded...This combined with random distribution suggests bioturbation...supported by lack of depositional fabrics...abundance of algae in sediment...BA 2 likely."
• "...thick bedded oncoid-rich lithofacies..." From Ratcliffe (1991) (ref. 6688): facies composed of Lst beds 200-500 m thick, with little or no silty mudstone. Lst beds composed of oncoidal wackestones and packstones with occasional 30-50 mm thick beds of skeletal grainstone. Large algal bioherms occur.

Size class: macrofossils

Primary reference: K. T. Ratcliffe. 1999. Brachiopod assemblages from the Much Wenlock Limestone Formation of England and Wales. In A. J. Boucot and J. D. Lawson (eds.), Paleocommunities--a case study from the Silurian and Lower Devonian 399-407 [M. Foote/M. Foote/M. Foote]more details

Purpose of describing collection: paleoecologic analysis

PaleoDB collection 23285: authorized by Michael Foote, entered by Michael Foote on 11.07.2002

Creative Commons license: CC BY (attribution)

Taxonomic list

• Only brachiopods are studied thoroughly.
Show authors, comments, and common names
Hormogoneae
 Oscillatoriales - Girvanellaceae
Girvanella sp.
Girvanella sp. Nicholson and Etheridge 1878
algae
Rothpletzella
  -
Rothpletzella sp.
Rothpletzella sp. Wood 1948
algae
Rhynchonellata
 Pentamerida - Clorindidae
Antirhynchonella sp.
Antirhynchonella sp. Oehlert 1887
 Pentamerida - Gypidulidae
Gypidula sp.
Gypidula sp. Hall 1867
 Rhynchonellida - Hebetoechiidae
Sphaerirhynchia wilsoni
Sphaerirhynchia wilsoni de Sowerby 1816
 Rhynchonellida - Trigonirhynchiidae
Microsphaeridiorhynchus sp., Rhynchotreta sp.
Rhynchotreta sp. Hall 1879
 Spiriferida - Delthyrididae
Howellella elegans
Howellella elegans Muir-Wood 1925
 Spiriferida - Cyrtinopsidae
Kozlowskiellina sp.
Kozlowskiellina sp. Boucot 1958
 Spiriferida - Cyrtiidae
Eospirifer sp., Cyrtia sp.
Eospirifer sp. Schuchert 1913
Cyrtia sp. Dalman 1828
 Atrypida - Atrypidae
Atrypidae indet., Atrypa sp.
Atrypidae indet. Gill 1871
heavily ribbed atrypid
Atrypa sp. Dalman 1828
 Atrypida - Glassiidae
Glassia sp.
Glassia sp. Davidson 1881
genus name in quotes
 Athyridida - Nucleospiridae
Nucleospira sp.
Nucleospira sp. Hall 1859
 Athyridida - Meristellidae
Whitfieldella sp.
Whitfieldella sp. Hall and Clarke 1893
 Orthida - Dicoelosiidae
Dicoelosia sp.
Dicoelosia sp. King 1850
 Orthida - Rhipidomellidae
Dalejina sp.
Dalejina sp. Havlicek 1953
 Orthida - Dalmanellidae
Isorthis sp., Resserella sp.
Isorthis sp. Kozlowski 1929
Resserella sp. Bancroft 1928
Strophomenata
 Strophomenida - Leptostrophiidae
Leptostrophia sp.
Leptostrophia sp. Hall and Clarke 1892
 Strophomenida - Rafinesquinidae
Leptaena sp., Scamnomena sp.
Leptaena sp. Dalman 1828
Scamnomena sp. Bassett 1977
 Strophomenida - Furcitellidae
Pentlandina sp.
Pentlandina sp. Bancroft 1949
 Strophomenida - Amphistrophiidae
Amphistrophia sp.
Amphistrophia sp. Hall and Clarke 1892
 Strophomenida - Strophochonetidae
Protochonetes sp.
Protochonetes sp. Muir-Wood 1962
 Strophomenida - Strophodontidae
Pholidostrophia sp.
Pholidostrophia sp. Hall and Clarke 1892
 Strophomenida - Leptestiidae
Leangella sp.
Leangella sp. Opik 1933
 Orthotetida - Chilidiopsidae
"Coolinia sp." = Fardenia (Coolinia)
"Coolinia sp." = Fardenia (Coolinia) Bancroft 1949
Bryozoa
  -
Bryozoa indet.
Bryozoa indet. Ehrenberg 1831
Stenolaemata
 Trepostomata -
Trepostomata indet.
Trepostomata indet. Ulrich 1882
 Cystoporata - Fistuliporidae
Fistuliporidae indet.
 Cryptostomata -
Cryptostomata indet.
Anthozoa
 Heliolitida - Stelliporellidae
Stelliporella parvistella
 Heliolitida - Heliolitidae
Heliolites spp.
Heliolites spp. Dana 1846 tabulate coral
 Favositida - Favositidae
Favosites spp.
Favosites spp. Lamarck 1816 tabulate coral