PBDB Collection

Fauna e, Section AV1, 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 26031: 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
Strophomenata
Strophomenida - Furcitellidae	Pentlandina harperi⁴ Pentlandina harperi⁴ Zhang 1989
Strophomenida - Leptellinidae	Leptellina (Merciella) mackenziensis⁴ Leptellina (Merciella) mackenziensis⁴ Jin and Chatterton 1997
Strophomenida - Aegiromenidae	Chonetoidea obliqua⁴, Jonesea undulata⁴, Jonesea grayi⁴ Chonetoidea obliqua⁴ Jin and Chatterton 1997 Jonesea undulata⁴ Jin and Chatterton 1997 Jonesea grayi⁴ Davidson 1849
Orthotetida - Triplesiidae	Acaretyrricula tenuiguttae⁴ Acaretyrricula tenuiguttae⁴ Jin and Chatterton 1997
Rhynchonellata
Protorthida - Skenidiidae	Skenidioides operosa⁴ Skenidioides operosa⁴ Johnson et al. 1976
Athyridida - Meristellidae	Whitfieldella sulcatina⁴ Whitfieldella sulcatina⁴ Jin et al. 1993
Trilobita
Phacopida - Calymenidae	Calymene cf. frontosa⁵ Calymene cf. frontosa⁵ Lindström 1885 trilobite
Phacopida - Encrinuridae	Cromus canorus n. sp.³ Cromus canorus n. sp.³ trilobite
Phacopida - Cheiruridae	"Deiphon" salmoni², Youngia boucoti², Youngia johnsoni², Radiurus avalanchensis² "Deiphon" salmoni² trilobite Youngia boucoti² Chatterton and Perry 1984 trilobite Youngia johnsoni² Chatterton and Perry 1984 trilobite Radiurus avalanchensis² trilobite
Proetida - Aulacopleuridae	Aulacopleura andersoni¹ Aulacopleura andersoni¹ trilobite
Odontopleurida - Odontopleuridae	Odontopleura mccallai, "Odontopleura greenwoodi" = Odontopleura (Sinespinaspis) greenwoodi, Leonaspis beni, Stelckaspis warreni Odontopleura mccallai trilobite "Odontopleura greenwoodi" = Odontopleura (Sinespinaspis) greenwoodi Chatterton and Perry 1983 trilobite Leonaspis beni trilobite Stelckaspis warreni trilobite

¹Adrain and Chatterton 1995; ²Chatterton and Perry 1984; ³Edgecombe and Chatterton 1992; ⁴Jin and Chatterton 1997; ⁵Siveter and Chatterton 1996