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

Where: Northwest Territories, Canada (62.4° N, 127.0° W: paleocoordinates 8.3° N, 53.2° W)

• coordinate estimated from map

• outcrop-level geographic resolution

When: Pterospathodus celloni conodont 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..."

Size class: macrofossils

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 26030: 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
unclassified
  -
Songkaia smithi n. sp.1
Rhynchonellata
 Orthida - Dicoelosiidae
Dicoelosia parvifrons3, Epitomyonia clausula3, Epitomyonia triseptata3
Dicoelosia parvifrons3 Johnson et al. 1976
Epitomyonia clausula3 Johnson et al. 1976
 Protorthida - Skenidiidae
Skenidioides operosa3
Skenidioides operosa3 Johnson et al. 1976
Strophomenata
 Strophomenida - Aegiromenidae
Jonesea undulata3
Jonesea undulata3 Jin and Chatterton 1997
 Strophomenida - Leptellinidae
Leptellina (Merciella) mackenziensis3
Leptellina (Merciella) mackenziensis3 Jin and Chatterton 1997
 Strophomenida - Leptestiidae
Leangella (Leangella) sp.3
 Orthotetida - Triplesiidae
Acaretyrricula tenuiguttae3
Acaretyrricula tenuiguttae3 Jin and Chatterton 1997
Trilobita
 Proetida - Aulacopleuridae
Aulacopleura andersoni1
 Odontopleurida - Odontopleuridae
Ceratocephala avalanchensis, "Acidaspis (Dalaspis) drzymlai" = Dalaspis, Stelckaspis tuberculosa, Stelckaspis gingiva
"Acidaspis (Dalaspis) drzymlai" = Dalaspis trilobite
 Phacopida - Encrinuridae
Perryus bartletti n. sp.2, Distyrax sp. n. sp.2
Perryus bartletti n. sp.2 trilobite
Distyrax sp. n. sp.2 Lane 1988 trilobite
n. sp. A
1Adrain and Chatterton 1995; 2Edgecombe and Chatterton 1992; 3Jin and Chatterton 1997