Fauna h, Section AV3, Whittaker Fm., Mackenzie Mts. (Silurian of Canada)

Where: Northwest Territories, Canada (62.4° N, 127.0° W: paleocoordinates 9.0° N, 54.0° W)

• coordinate estimated from map

• outcrop-level geographic resolution

When: Pterospathodus celloni zone, Whittaker Formation, Llandovery (443.4 - 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: basinal (); shale and limestone

• "The strata assigned to the Whittaker Formation in these sections are largely deeper water platform margin or upper slope limestones and shales." Grand Cycle 2-3 transition.

•SEP environmental call based on given information; this sample appears to have come at or very near MFS. I have placed above the MFS in HST, but it is possible that it is at the MFS.

• 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..."

•SEP: I have switched the order of shale and limestone to reflect that this comes from the base of the brown shaly unit at base of Delorme and Grand Cycle 3

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 26046: 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
Trilobita
 Phacopida - Cheiruridae
Deiphon sp., Sphaerexochus dimorphus, "Youngia brennardi" = Parayoungia brennardi
Deiphon sp. Barrande 1846 trilobite
Sphaerexochus dimorphus Whittington and Evitt 1953 trilobite
"Youngia brennardi" = Parayoungia brennardi Chatterton and Perry 1984 trilobite
 Odontopleurida - Odontopleuridae
Ceratocephala tungstenensis, Leonaspis besti, Leonaspis sp. n. sp.
Leonaspis besti trilobite
Leonaspis sp. n. sp. Richter and Richter 1917 trilobite
n. sp. A