Mucronaspis community, White Head Formation (Ordovician of Canada)

Where: Québec, Canada (49.0° N, 64.0° W: paleocoordinates 22.7° S, 37.7° W)

• coordinate based on nearby landmark

• outcrop-level geographic resolution

When: Cote de la Surprise Member (White Head Formation), Hirnantian (445.2 - 443.4 Ma)

• Sampled from a single horizon in middle of member.

• bed-level stratigraphic resolution

Environment/lithology: offshore; lithified, brown, green, calcareous mudstone

• Interpreted by author as BA6, implying outer shelf/slope
• Steeply dipping, dark green (weathering red-brown) calcareous mudstones

Size classes: macrofossils, mesofossils

Primary reference: P. J. Lespérance. 1988. Percé, Québec, Canada. Bulletin of the British Museum of Natural History (Geology) 43:239-245 [P. Novack-Gottshall/P. Novack-Gottshall]more details

Purpose of describing collection: biostratigraphic analysis

PaleoDB collection 81280: authorized by Phil Novack-Gottshall, entered by Phil Novack-Gottshall on 16.06.2008

Creative Commons license: CC BY (attribution)

Taxonomic list

Demospongiae
 Lithistida - Astylospongiidae
Astylospongia praemorsa Goldfuss 1826 demosponge
Bivalvia
  -
Bivalvia indet. Linnaeus 1758 clam
Strophomenata
 Strophomenida - Pholidostrophidae
Pholidostrophidae indet. Stainbrook 1943
"pholidostrophid articulate brachiopod"
Lingulata
 Lingulida -
Lingulida indet. Waagen 1885
lingulid inarticulate brachiopod
Trilobita
 Trinucleida - Trinucleidae
 Phacopida - Homalonotidae
Brongniartella robusta Lespérance 1968 trilobite
 Phacopida - Dalmanitidae
Mucronaspis olini Temple 1952 trilobite
"Mucronaspis mucronata" = Mucronaspis (Songxites) mucronatus Brongniart 1822 trilobite
Pterobranchia
 Graptoloidea - Diplograptidae
Orthograptus sp. Lapworth 1873 graptolite
 Graptoloidea - Normalograptidae
"Climacograptus normalis" = Normalograptus normalis
"Climacograptus normalis" = Normalograptus normalis Lapworth 1877 graptolite