PBDB Collection

Fauna e, Section AV2, 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: 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 26037: 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 Songkaia smithi n. sp.¹
Trilobita
Phacopida - Encrinuridae	Cromus canorus n. sp.³ Cromus canorus n. sp.³ trilobite
Phacopida - Cheiruridae	Radiurus avalanchensis², Youngia boucoti², Youngia johnsoni² Radiurus avalanchensis² trilobite Youngia boucoti² Chatterton and Perry 1984 trilobite Youngia johnsoni² Chatterton and Perry 1984 trilobite
Proetida - Aulacopleuridae	Aulacopleura andersoni¹ Aulacopleura andersoni¹ trilobite
Odontopleurida - Odontopleuridae	Leonaspis beni, "Odontopleura greenwoodi" = Odontopleura (Sinespinaspis) greenwoodi, Stelckaspis warreni Leonaspis beni trilobite "Odontopleura greenwoodi" = Odontopleura (Sinespinaspis) greenwoodi Chatterton and Perry 1983 trilobite Stelckaspis warreni trilobite
Rostroconchia
Conocardiida - Bransoniidae	Mulceodens schneideri⁵ Mulceodens schneideri⁵ Johnston and Chatterton 1983
Rhynchonellata
Protorthida - Skenidiidae	Skenidioides operosa⁴ Skenidioides operosa⁴ Johnson et al. 1976
Orthida - Hesperorthidae	Dolerorthis cf. plicata⁴ Dolerorthis cf. plicata⁴ de Sowerby and Murchison 1839
Orthida - Dicoelosiidae	Epitomyonia sekwiensis⁴, Epitomyonia triseptata⁴, Dicoelosia diversifrons⁴, Dicoelosia parvifrons⁴ Epitomyonia sekwiensis⁴ Lenz 1977 Epitomyonia triseptata⁴ Lenz 1977 Dicoelosia diversifrons⁴ Johnson et al. 1976 Dicoelosia parvifrons⁴ Johnson et al. 1976
Strophomenata
Orthotetida - Triplesiidae	Acaretyrricula tenuiguttae⁴ Acaretyrricula tenuiguttae⁴ Jin and Chatterton 1997
Strophomenida - Leptellinidae	Leptellina (Merciella) mackenziensis⁴ Leptellina (Merciella) mackenziensis⁴ Jin and Chatterton 1997
Strophomenida - Aegiromenidae	Jonesea undulata⁴ Jonesea undulata⁴ Jin and Chatterton 1997

¹Adrain and Chatterton 1995; ²Chatterton and Perry 1984; ³Edgecombe and Chatterton 1992; ⁴Jin and Chatterton 1997; ⁵Johnston and Chatterton 1983