PBDB Collection

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

Where: Northwest Territories, Canada (62.4° N, 127.0° W: paleocoordinates 9.8° N, 54.8° W)

• coordinate estimated from map

• outcrop-level geographic resolution

When: Distomodus kentuckyensis conodont zone, Whittaker Formation, Aeronian (440.8 - 438.5 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.)

•

•Was Llandovery, but D. kentuckyensis zone is Aeronian.

• group of beds-level stratigraphic resolution

Environment/lithology: deep subtidal shelf; argillaceous limestone and calcareous shale

• Later part of Sedimentary Grand Cycle 1. "The strata assigned to the Whittaker Formation in these sections are largely deeper water platform margin or upper slope limestones and shales."

•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..." Based on stratigraphic chart, Faunal assemblage a is from argillaceous limestone.

Size classes: macrofossils, mesofossils

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 26027: authorized by Michael Foote, entered by Michael Foote on 01.10.2002, edited by Melanie Hopkins

Creative Commons license: CC BY (attribution)

Taxonomic list

Show authors, comments, and common names

Strophomenata
Strophomenida - Furcitellidae	Katastrophomena parvicardinis⁵ Katastrophomena parvicardinis⁵ Jin and Chatterton 1997
Strophomenida - Rafinesquinidae	"Leptaena haverfordensis" = Leptaena (Leptaena) haverfordensis⁵ "Leptaena haverfordensis" = Leptaena (Leptaena) haverfordensis⁵ Bancroft 1949
Rhynchonellata
Orthida - Dalmanellidae	Dalmanella edgewoodensis⁵ Dalmanella edgewoodensis⁵ Savage 1913
Orthida - Dicoelosiidae	Epitomyonia sekwiensis⁵ Epitomyonia sekwiensis⁵ Lenz 1977
Atrypida - Cyclospiridae	Cyclospira sp.⁵ Cyclospira sp.⁵ Hall and Clarke 1893
Protorthida - Skenidiidae	Skenidioides operosa⁵ Skenidioides operosa⁵ Johnson et al. 1976
Trilobita
Odontopleurida - Odontopleuridae	Leonaspis jaanussoni, Primaspis mackenziensis, Ceratocephala avalanchensis Leonaspis jaanussoni trilobite Primaspis mackenziensis trilobite Ceratocephala avalanchensis trilobite
Lichida - Lichidae	Platylichas infimus n. sp.³ Platylichas infimus n. sp.³ Campbell and Chatterton 2006 trilobite
Proetida - Aulacopleuridae	Maurotarion messieri n. sp.², ? Aulacopleura ranfordi n. sp.¹ Maurotarion messieri n. sp.² trilobite ? Aulacopleura ranfordi n. sp.¹ trilobite
Proetida - Otarionidae	Harpidella tikkaneni n. sp.² Harpidella tikkaneni n. sp.² trilobite
Phacopida - Calymenidae	Calymene sp. n. sp.⁶ Calymene sp. n. sp.⁶ Brongniart 1822 trilobite
Phacopida - Encrinuridae	Curriella clancyi n. sp.⁴ Curriella clancyi n. sp.⁴ Edgecombe and Chatterton 1990 trilobite 84.5 - 97.5 m

¹Adrain and Chatterton 1995; ²Adrain and Chatterton 1995; ³Campbell and Chatterton 2006; ⁴Edgecombe and Chatterton 1990; ⁵Jin and Chatterton 1997; ⁶Siveter and Chatterton 1996