Mount Murchison, Ellipsocephaloides Zone (Text-Fig 23) (Cambrian of Canada)

Where: Alberta, Canada (51.5° N, 116.2° W: paleocoordinates 2.8° S, 75.6° W)

• coordinate estimated from map

• outcrop-level geographic resolution

When: Bison Creek Formation, Sunwaptan (493.5 - 487.5 Ma)

• group of beds-level stratigraphic resolution

Environment/lithology: deep subtidal; lithified, calcareous shale and lithified, intraclastic, shelly/skeletal grainstone

• at type section (Mount Murchison) consists of 177m of calcareous shales and mudstones, calcarenites, intrarudites, and algal buildups

Size class: macrofossils

Primary reference: S. R. Westrop. 1986. Trilobites of the Upper Cambrian Sunwaptan Stage, southern Canadian Rocky Mountains, Alberta. Palaeontographica Canadiana 3:1-179 [S. Peters/S. Peters/U. Merkel]more details

Purpose of describing collection: biostratigraphic analysis

PaleoDB collection 64687: authorized by Shanan Peters, entered by Shanan Peters on 12.09.2006

Creative Commons license: CC BY (attribution)

Taxonomic list

Show authors, comments, and common names
Trilobita
 Olenida - Parabolinoididae
Croixana ambigua, Croixana inflata
Croixana inflata trilobite
 Olenida - Idahoiidae
Saratogia wisconsensis, Wilbernia pero
Saratogia wisconsensis Hall 1863 trilobite
Wilbernia pero Walcott 1890 trilobite
 Asaphida - Ptychaspididae
Keithiella cf. depressa, Ptychaspis sp., Ptychaspis striata, Ptychaspis ? bullasa, Ptychaspis "sp.", Ptychaspis cf. miniscaensis
Keithiella cf. depressa Rasetti 1944 trilobite
Ptychaspis sp. Hall 1863 trilobite
Ptychaspis "sp." Hall 1863 trilobite
Ptychaspis cf. miniscaensis Owen 1852 trilobite
 Asaphida - Dikelocephalidae
Stigmaspis albertensis, Monocheilus orestes, Monocheilus micros
Monocheilus micros Walter 1926 trilobite
 Ptychopariida - Elviniidae
Drumaspis idahoensis
  - Ellipsocephaloididae
Ellipsocephaloides silvestris, Ellipsocephaloides monsensis, Ellipsocephaloides argutus, Ellipsocephaloides curtus
Ellipsocephaloides curtus Whitfield 1878 trilobite
Artiopoda
 Agnostida - Diplagnostidae
"Pseudagnostus josepha" = Pseudagnostus josephus, "Litagnostus parilis" = Pseudagnostus
"Pseudagnostus josepha" = Pseudagnostus josephus Hall 1863
"Litagnostus parilis" = Pseudagnostus