Howellella-Strophomenid Comm., Much Wenlock Lst. (Silurian of the United Kingdom)

Where: England, United Kingdom (52.0° N, 2.0° W)

• Paleocoordinates: 15.8° S, 53.3° W (Wright 2013)

• coordinate based on political unit

• basin-level geographic resolution

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

• ludensis and nassa zones

• formation-level stratigraphic resolution

Environment/lithology: marine; lime mudstone and bioturbated, silty mudstone

• "...open shelf, periodically affected by wave action that produced wave rippled beds. Betw. high energy events, carb. mud settled from suspension to produce carb. mudst. and skeletal wackestone. Low energy with slow steady deposition. Fossils articulated, approx. in life position. Possibly BA 3 or deep BA 2."
• "interbedded limestone and silty mudstone lithfaces" From Ratcliffe 1991 (ref. 6688): facies is composed of varying proportions of continuous limestone beds separated by silty mudstone. Lst beds compositionally variable; carb. mudstones, skeletal wackestones, skeletal packstones, crinoidal grainstones and peloidal grainstones all common. .Wave rippled bedding surfaces and symmetrical cross lamination common. Small coral/stromatop. 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 23288: authorized by Michael Foote, entered by Michael Foote on 11.07.2002

Creative Commons license: CC0 (CC0)

Taxonomic list

• Only brachiopods are studied thoroughly.
Show authors, comments, and common names
unclassified
  -
Kozlowskielliina sp.
Anthozoa
 Favositida - Coenitidae
Coenites sp.
Coenites sp. Eichwald 1829 tabulate coral
Rhynchonellata
 Rhynchonellida - Trigonirhynchiidae
Microsphaeridiorhynchus sp., Rhynchotreta sp.
Rhynchotreta sp. Hall 1879
 Rhynchonellida - Hebetoechiidae
Sphaerirhynchia sp.
Sphaerirhynchia sp. Cooper and Muir-Wood 1951
 Pentamerida - Clorindidae
Antirhynchonella sp.
Antirhynchonella sp. Oehlert 1887
 Pentamerida - Gypidulidae
Gypidula sp.
Gypidula sp. Hall 1867
 Atrypida - Glassiidae
Glassia sp.
Glassia sp. Davidson 1881
genus name in quotes
 Atrypida - Atrypidae
Atrypidae indet., Atrypa sp.
Atrypidae indet. Gill 1871
ribbed atrypid
Atrypa sp. Dalman 1828
 Spiriferida - Cyrtiidae
Cyrtia sp., Eospirifer sp., Striispirifer sp.
Cyrtia sp. Dalman 1828
Eospirifer sp. Schuchert 1913
Striispirifer sp. Cooper and Muir-Wood 1951
 Spiriferida - Delthyrididae
Howellella elegans
Howellella elegans Muir-Wood 1925
 Orthida - Rhipidomellidae
Dalejina sp.
Dalejina sp. Havlicek 1953
 Orthida - Dalmanellidae
Isorthis sp., Resserella sp.
Isorthis sp. Kozlowski 1929
Resserella sp. Bancroft 1928
Strophomenata
 Orthotetida - Chilidiopsidae
"Coolinia sp." = Fardenia (Coolinia)
"Coolinia sp." = Fardenia (Coolinia) Bancroft 1949
 Strophomenida - Strophochonetidae
Protochonetes sp.
Protochonetes sp. Muir-Wood 1962
 Strophomenida - Sowerbyellidae
Eoplectodonta sp.
Eoplectodonta sp. Kozlowski 1929
 Strophomenida - Rafinesquinidae
Scamnomena sp., Leptaena spp.
Scamnomena sp. Bassett 1977
Leptaena spp. Dalman 1828
 Strophomenida - Leptostrophiidae
"Leptostrophia (Leptostrophiella) filosa" = Mesoleptostrophia filosa
"Leptostrophia (Leptostrophiella) filosa" = Mesoleptostrophia filosa Sowerby 1839
 Strophomenida - Amphistrophiidae
"Amphistrophiella (Amphistrophiella) funiculata" = Amphistrophiella funiculata
"Amphistrophiella (Amphistrophiella) funiculata" = Amphistrophiella funiculata M'Coy 1846
Stenolaemata
 Trepostomata -
Trepostomata indet.
Trepostomata indet. Ulrich 1882
 Rhabdomesida - Rhabdomesidae
Rhabdomesidae indet.
Crinoidea
  -
Crinoidea indet.
Crinoidea indet. Miller 1821 Sea lily
ossicles