Fauna g, Section AV1, Whittaker Fm., Mackenzie Mts. (Silurian of Canada)

Where: Northwest Territories, Canada (62.4° N, 127.0° W: paleocoordinates 8.2° N, 53.4° W)

• coordinate estimated from map

• outcrop-level geographic resolution

When: Pterospathodus celloni zone, Whittaker Formation, Telychian (438.5 - 433.4 Ma)

• Zonation based on conodonts present in AV sections 1, 2, and 4. (AV 3 and DR sections correlated with these on basis of trilobite faunal assemblages.)

• group of beds-level stratigraphic resolution

Environment/lithology: offshore shelf; argillaceous limestone and calcareous shale

• "The strata assigned to the Whittaker Formation in these sections are largely deeper water platform margin or upper slope limestones and shales." Shallower upper half of Grand Cycle 2.

•SEP environmental call based on given information

• Whittaker Fm. in general: "Beneath a distinctive buff-brown coloured shale unit, assigned to the base of the Delorme Fm., the strata consist of interbedded argillaceous limestones, calcareous shales, and cherty dolomites...The more carbonate-rich horizons contain rich silicified trilobite, conodont, and ostracode faunas. They also contain sparser coral, bryozoanb, brachiopod, mollusc, and other invertebrate faunas..."

Preservation: replaced with silica

Primary reference: B. D. E. Chatterton and D. G. Perry. 1983. Silicified Silurian odontopleurid trilobites from the Mackenzie Mountains. Palaeontographica Canadiana 1:1-55 [M. Foote/M. Foote/M. Foote]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 26033: authorized by Michael Foote, entered by Michael Foote on 01.10.2002

Creative Commons license: CC BY (attribution)

Taxonomic list

Show authors, comments, and common names
Rhynchonellata
 Pentamerida - Clorindidae
Clorinda parvolinguifera3
Clorinda parvolinguifera3 Sapelnikov 1972
 Pentamerida - Pentameridae
Pentameroides septentrionalis3
Trilobita
 Phacopida - Encrinuridae
Cromus canorus n. sp.2, Distyrax cooperi n. sp.2
Cromus canorus n. sp.2 trilobite
Distyrax cooperi n. sp.2 trilobite
 Phacopida - Cheiruridae
Radiurus avalanchensis1, "Youngia folinsbeei" = Parayoungia folinsbeei1, Youngia kathyae1
"Youngia folinsbeei" = Parayoungia folinsbeei1 Chatterton and Perry 1984 trilobite
Youngia kathyae1 Chatterton and Perry 1984 trilobite
 Odontopleurida - Odontopleuridae
Ceratocephala avalanchensis, "Ceratocephalina sp. n. sp." = Ceratocephala (Ceratocephalina), Leonaspis boltoni, Odontopleura nehedensis, "Odontopleura greenwoodi" = Odontopleura (Sinespinaspis) greenwoodi
"Ceratocephalina sp. n. sp." = Ceratocephala (Ceratocephalina) Whittington 1956 trilobite
"Odontopleura greenwoodi" = Odontopleura (Sinespinaspis) greenwoodi Chatterton and Perry 1983 trilobite
1Chatterton and Perry 1984; 2Edgecombe and Chatterton 1992; 3Jin and Chatterton 1997