Fauna k, Section DR, Delorme Fm., Mackenzie Mts. (Silurian to of Canada)

Where: Northwest Territories, Canada (62.8° N, 125.3° W: paleocoordinates 4.9° N, 49.3° W)

• coordinate estimated from map

• outcrop-level geographic resolution

When: Ozarkodina sagitta zone, Delorme Formation, Wenlock to Wenlock (433.4 - 423.0 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: slope; argillaceous limestone and shale

• Grand Cycle 3.

•SEP environmental call based on given information

• "...sequence of buff and light brown weathering, thinly bedded limestones, dolomites and shales that overlie the Whittaker Formation and underlie the Camsell Formation...The beds above and including a distinctive buff-brown shale unit in the sections near Avalanche Lake are included in the Delorme Formation in this work, although the lowest buff-brown shaly beds (below distinctive orange coloured limestones and dolomites) could be regarded as transitional between the Road River and Delorme..."

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 26051: 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
Rostroconchia
 Conocardiida - Pseudobigaleaidae
Nehedia grovesi5
Nehedia grovesi5 Johnston and Chatterton 1983
Trilobita
 Proetida - Otarionidae
Otarion brauni1, Otarion beukeboomi n. sp.1, Cyphaspis buchbergeri n. sp.2
Otarion brauni1 trilobite
Otarion beukeboomi n. sp.1 trilobite
Cyphaspis buchbergeri n. sp.2 trilobite
 Odontopleurida - Odontopleuridae
"Diacanthaspis (Acanthalomina) thorsteinssoni" = Acanthalomina, Ceratocephala plummeri, Odontopleura ovata, Acidaspis jessi, Dudleyaspis rutteri
"Diacanthaspis (Acanthalomina) thorsteinssoni" = Acanthalomina trilobite
Odontopleura ovata Emmrich 1839 trilobite
Acidaspis jessi trilobite
 Phacopida - Cheiruridae
Deiphon brabrooki3, Didrepanon delormensis3, Contracheirurus sp. n. sp.3, Sphaerexochus johnstoni3
Contracheirurus sp. n. sp.3 Chatterton and Perry 1984 trilobite
n. sp. A
Sphaerexochus johnstoni3 Chatterton and Perry 1984 trilobite
 Phacopida - Encrinuridae
Struszia (Struszia) harrisoni4
1Adrain and Chatterton 1994; 2Adrain and Chatterton 1996; 3Chatterton and Perry 1984; 4Edgecombe and Chatterton 1993; 5Johnston and Chatterton 1983