Dicoelosia-Orthostrophella Community, Ludlow, West Point Fm., Gaspe (Silurian of Canada)

Where: Quebec, Canada (48.0° N, 65.0° W: paleocoordinates 27.3° S, 30.2° W)

• coordinate estimated from map

• local area-level geographic resolution

When: Anse a la Loutre Member (West Point Formation), Ludlow (427.4 - 423.0 Ma)

• member-level stratigraphic resolution

Environment/lithology: deep subtidal shelf; gray lime mudstone

• "Shells almost entirely articulated...High diversity suggests normal oxygen...normal level of turbulence...BA 4. [P.-A. Bourque] finds that the Gaspe occurrences represent fore-reef facies of the lower reef compelx of the West Point Formation."

•SEP environmental call based on given information

• "fine grained matrix of micritic limestone...secondarily reddish due to weathering [originally gray]."

Size class: macrofossils

Collection methods: Comparison with other occurrences of this Community suggests that the elements listed are present here.

Primary reference: A. J. Boucot. 1999. Some Wenlockian-Geddinian, chiefly brachiopod dominated communities of North America. In A. J. Boucot, J. D. Lawson (eds.), Paleocommunities--a case study from the Silurian and Lower Devonian 549-591 [M. Foote/M. Foote/P. Wagner]more details

Purpose of describing collection: paleoecologic analysis

PaleoDB collection 24818: authorized by Michael Foote, entered by Michael Foote on 20.08.2002

Creative Commons license: CC BY (attribution)

Taxonomic list

Show authors, comments, and common names
unclassified
  -
Rhynchospiridae indet.
Strophomenata
 Orthotetida - Chilidiopsidae
"Coolinia sp." = Fardenia (Coolinia)
"Coolinia sp." = Fardenia (Coolinia) Bancroft 1949
 Strophomenida - Strophonellidae
Strophonella sp.
Strophonella sp. Hall 1879
 Strophomenida - Leptaenoideidae
Leptaenisca sp.
Leptaenisca sp. Beecher 1890
 Strophomenida - Amphistrophiidae
"Amphistrophiella sp." = Amphistrophia (Amphistrophiella)
"Amphistrophiella sp." = Amphistrophia (Amphistrophiella) Harper and Boucot 1978
Chileata
 Dictyonellida - Eichwaldiidae
"Dictyonella sp." = Eodictyonella
"Dictyonella sp." = Eodictyonella Wright 1994
Rhynchonellata
 Pentamerida - Parastrophinidae
"Grayina sp." = Anastrophia (Grayina)
"Grayina sp." = Anastrophia (Grayina)
 Pentamerida - Gypidulidae
Amsdenina sp.
 Spiriferida - Delthyrididae
Delthyris sp., Howellella sp.
Delthyris sp. Dalman 1828
Howellella sp. Kozlowski 1946
 Athyridida - Meristellidae
Meristina sp.
Meristina sp. Hall 1867
 Athyridida - Nucleospiridae
Nucleospira sp.
Nucleospira sp. Hall 1859
 Athyridida - Anoplothecidae
Coelospira sp.
Coelospira sp. Hall 1863
 Atrypida - Lissatrypidae
Lissatrypa sp.
Lissatrypa sp. Twenhofel 1914
 Atrypida - Atrypidae
Atrypa sp.
Atrypa sp. Dalman 1828
 Rhynchonellida -
Rhynchonellida indet.
 Orthida - Rhipidomellidae
Dalejina sp.
Dalejina sp. Havlicek 1953
 Orthida - Dalmanellidae
Resserella sp., Isorthis sp.
Resserella sp. Bancroft 1928
Isorthis sp. Kozlowski 1929
 Orthida - Orthidae
Orthostrophella sp.
 Orthida - Hesperorthidae
Ptychopleurella sp., Dolerorthis sp.
Ptychopleurella sp. Schuchert and Cooper 1931
Dolerorthis sp. Schuchert and Cooper 1931
unclassified
  -
Porifera indet.
Porifera indet. Grant 1836