BA -420 [Great Phyllopod Bed, Walcott Quarry Mbr, Burgess Shale Fm] (Cambrian of Canada)

Where: British Columbia, Canada (51.4° N, 116.5° W: paleocoordinates 3.7° S, 80.0° W)

• coordinate based on nearby landmark

• outcrop-level geographic resolution

When: Walcott Quarry Member (Burgess Shale Formation), Delamaran (513.0 - 505.0 Ma)

• STRATIGRAPHIC RELATIONS: From the Great Phyllopod Bed of the Walcott Quarry Member, Burgess Shale Fm, Chancellor Gp, which overlies the Wash Limestone Mbr, and is overlain by the Raymond Quarry Shale Mbr. AGE: early Middle Cambrian, Delamaran North American stage. STRATIGRAPHIC POSITION: From 20 mm thick bed, 420 cm below "lower ginger layer, representing the base of the "Phyllopod Bed".

• bed-level stratigraphic resolution

Environment/lithology: deep-water; lithified, calcareous siltstone and lithified, cherty/siliceous mudstone

• ENVIRONMENT: Deep-water depositional environment.
• SPECIFIC LITHOLOGY: Cm-scale interbedded siliceous mudstone and calcisiltites. LITHIFICATION: Lithified.

Size class: macrofossils

Preservation: cast, mold/impression, adpression, soft parts

Reposited in the ROM

Collection methods: quarrying,

• COLLECTOR: Royal Ontario Museum staff. REPOSTORY: Royal Ontario Museum (ROM).

Primary reference: J.-B. Caron and D. A. Jackson. 2008. Paleoecology of the Greater Phyllopod Bed community, Burgess Shale. Palaeogeography, Palaeoclimatology, Palaeoecology 258:222-256 [A. Hendy/A. Hendy/A. Hendy]more details

Purpose of describing collection: paleoecologic analysis

PaleoDB collection 84417: authorized by Austin Hendy, entered by Austin Hendy on 18.10.2008

Creative Commons license: CC BY (attribution)

Taxonomic list

• COVERAGE: Exhaustive for all taxa. NOMENCLATURE: Not an authoritative publication, but with modern nomenclature, and species-resolution identifications.
Morania
  -
Morania sp. Walcott 1919
unclassified
  -
Florideophyceae
 Ceramiales - Rhodymeniophycidae
Wahpia sp. Walcott 1919
 Gephyrea - Pikaidae
Oesia sp. Walcott 1911
Demospongiae
 Protomonaxonida - Hazeliidae
Hazelia sp. Walcott 1920 demosponge
Bosworthia
  -
Bosworthia sp. Walcott 1919
Tergomya
 Scenelloidea - Scenellidae
Scenella amii Matthew 1902
 Sachitida -
Wiwaxia corrugata Matthew 1899
Odontogriphus
  -
Odontogriphus omalus Conway-Morris 1976
Kutorginata
 Kutorginida - Nisusiidae
Rhynchonellata
 Orthida - Bohemiellidae
Paterinata
 Paterinida - Paterinidae
Hyolitha
 Hyolithida - Hyolithidae
Burgessochaeta
  -
 Archaeopriapulida - Ottoidae
Ottoia prolifica Walcott 1911
 Archaeopriapulida - Selkirkiidae
Selkirkia columbia Conway Morris 1977
Molaria
  -
 Bradoriida - Svealutidae
Burgessia
  -
Megacheira
 Yohoiida - Yohoiidae
Crustacea
 Waptiida - Waptiidae
Waptia fieldensis Walcott 1912
 Canadaspidida - Canadaspididae
Canadaspis perfecta Walcott 1912
Trilobita
 Ptychopariida - Alokistocaridae
 Ptychopariida - Ptychopariidae
Elrathina cordillerae Rominger 1887 trilobite
Artiopoda
 Vicissicaudata -
 Agnostida - Peronopsidae
"Ptychagnostus praecurrens" = Pentagnostus praecurrens
"Ptychagnostus praecurrens" = Pentagnostus praecurrens WestergÄrd 1936
 Bilateria - Opabiniidae
 Bilateria - Eldoniidae
Eldonia ludwigi Walcott 1911
Marrellomorpha
 Marrellida -
 Life - Wiwaxidae
Pollingeria grandis Walcott 1911