M. laevigata Assoc. of facies 5 and 6, Upper Bringewood Beds, Welsh Borderland (Silurian of the United Kingdom)

Where: England, United Kingdom (52.0° N, 3.0° W: paleocoordinates 27.9° S, 13.0° W)

• coordinate based on political unit

• basin-level geographic resolution

When: Upper Bringewood Formation, Gorstian (427.4 - 425.6 Ma)

• Age assignment based on ref. 6658.

• formation-level stratigraphic resolution

Environment/lithology: marine; shelly/skeletal grainstone and shale

• Present in facies 5 and 6. Interpreted as shallow shelf with high energy. F6 includes shoal lime sand. Carbonate interruption of shoaling upwards sequence of terrigenous sediments. Bank system.
• Facies 5: biocalcarenite with calcilutite matrix and shows gradations from mud-supported to grain-supported texture. Pellets, crinoid ossicles, brachiopod fragments, sponge spicules. Thin tabular beds throughout. Shale layers 1 cm thick or less between limestone beds.

•Facies 6: Crinoideal biosparrudite and coarse-grained biocalcarenite. Thin shale layers, but carbonates contain little clay. Biosparrudites grain-supported. Cross lamination of both planar and trough form.

Size class: macrofossils

Primary reference: R. Watkins and C. J. Aithie. 1980. Carbonate shelf environments and faunal communities in the Upper Bringewood Beds of the British Silurian. Palaeogeography, Palaeoclimatology, Palaeoecology 29:341-368 [M. Foote/M. Foote/M. Foote]more details

Purpose of describing collection: paleoecologic analysis

PaleoDB collection 23213: authorized by Michael Foote, entered by Michael Foote on 10.07.2002

Creative Commons license: CC BY (attribution)

Taxonomic list

Show authors, comments, and common names
Lingulata
 Lingulida - Lingulidae
Lingula lewisii
Craniata
 Craniopsida - Craniopsidae
Craniops implicata
Strophomenata
 Strophomenida - Strophochonetidae
Shagamella ludloviensis, Protochonetes ludloviensis
 Strophomenida - Shaleriidae
"Shaleria ornatella" = Shaleria (Janiomya) ornatella
"Shaleria ornatella" = Shaleria (Janiomya) ornatella Davidson 1871
 Strophomenida - Eopholidostrophiidae
Mesopholidostrophia laevigata
Mesopholidostrophia laevigata de Sowerby and Murchison 1839
 Strophomenida - Strophonellidae
"Strophonella euglypha" = Strophoprion euglypha
"Strophonella euglypha" = Strophoprion euglypha Dalman 1828
 Strophomenida - Leptostrophiidae
"Leptostrophia filosa" = Mesoleptostrophia filosa
"Leptostrophia filosa" = Mesoleptostrophia filosa Sowerby 1839
 Strophomenida - Amphistrophiidae
"Amphistrophia funiculata" = Amphistrophiella funiculata
"Amphistrophia funiculata" = Amphistrophiella funiculata M'Coy 1846
 Strophomenida - Rafinesquinidae
"Leptaena depressa" = Leptaena (Leptaena) depressa
"Leptaena depressa" = Leptaena (Leptaena) depressa Sowerby 1824
Rhynchonellata
 Pentamerida - Gypidulidae
Gypidula lata
 Pentamerida - Pentameridae
"Kirkidium knightii" = Kirkidium knighti
"Kirkidium knightii" = Kirkidium knighti Sowerby 1813
 Spiriferida - Delthyrididae
Howellella elegans
Howellella elegans Muir-Wood 1925
 Spiriferida - Cyrtiidae
Eospirifer radiatus
Eospirifer radiatus Sowerby 1834
 Athyridida - Dayiidae
Dayia navicula
Dayia navicula Sowerby 1839
 Atrypida - Atrypidae
Atrypa reticularis
Atrypa reticularis Linnaeus 1758
 Rhynchonellida - Trigonirhynchiidae
"Camarotoechia nucula" = Microsphaeridiorhynchus nucula
"Camarotoechia nucula" = Microsphaeridiorhynchus nucula Sowerby 1839
genus name in quotes
 Rhynchonellida - Hebetoechiidae
Sphaerirhynchia wilsoni
Sphaerirhynchia wilsoni de Sowerby 1816
 Orthida - Rhipidomellidae
Dalejina hybrida
Dalejina hybrida Sowerby 1839
 Orthida - Dalmanellidae
Isorthis clivosa
Bryozoa
  -
Bryozoa indet.
Bryozoa indet. Ehrenberg 1831
Stenolaemata
 Cryptostomata - Ptilodictyidae
Ptilodictya gracile
Cephalopoda
  -
Cephalopoda indet.
Cephalopoda indet. Cuvier 1797
Gastropoda
  -
Gastropoda indet.
Gastropoda indet. Cuvier 1795 snail
Bivalvia
 Ostreida - Pterineidae
Pteronitella retroflexa, Actinopteria sowerbyi
Trilobita
 Phacopida - Dalmanitidae
Dalmanites myops
Anthozoa
  -
Anthozoa indet.
Anthozoa indet. Ehrenberg 1834
solitary trochoid coral