PBDB Collection

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

Where: Northwest Territories, Canada (62.8° N, 125.3° W: paleocoordinates 4.2° N, 48.5° W)

• coordinate estimated from map

• outcrop-level geographic resolution

When: Kockelella patula zone, Delorme Formation, Whitwellian (430.5 - 425.4 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: 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 26050: 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

Trilobita
Odontopleurida - Odontopleuridae	Dudleyaspis rutteri, Acidaspis jessi, Leonaspis lenzi, "Xanionurus norfordi" = Radiaspis, Ceratocephala plummeri, "Ceratocephalina sevastopuloi" = Ceratocephala (Ceratocephalina) Dudleyaspis rutteri trilobite Acidaspis jessi trilobite Leonaspis lenzi trilobite "Xanionurus norfordi" = Radiaspis trilobite Ceratocephala plummeri trilobite "Ceratocephalina sevastopuloi" = Ceratocephala (Ceratocephalina) trilobite
Phacopida - Encrinuridae	Encrinurus speyeri n. sp.⁵, Struszia (Struszia) dimitrovi⁵ Encrinurus speyeri n. sp.⁵ trilobite Struszia (Struszia) dimitrovi⁵ trilobite
Phacopida - Cheiruridae	Contracheirurus sp. n. sp.⁴, Deiphon braybrooki⁴, Hadromeros scotti⁴, Sphaerexochus dimorphus⁴, Hyrokybe copelandi⁴, Hyrokybe lenzi⁴ Contracheirurus sp. n. sp.⁴ Chatterton and Perry 1984 trilobite n. sp. A Deiphon braybrooki⁴ trilobite Hadromeros scotti⁴ trilobite Sphaerexochus dimorphus⁴ Whittington and Evitt 1953 trilobite Hyrokybe copelandi⁴ Perry and Chatterton 1979 trilobite Hyrokybe lenzi⁴ Chatterton and Perry 1984 trilobite
Phacopida - Calymenidae	? Gravicalymene sp.⁶, Diacalymene gabrielsi⁶ ? Gravicalymene sp.⁶ Shirley 1936 trilobite Diacalymene gabrielsi⁶ Siveter and Chatterton 1996 trilobite
Proetida - Otarionidae	Otarion huddyi n. sp.¹ Otarion huddyi n. sp.¹ Adrain and Chatterton 1994 trilobite
Lichida - Lichidae	Borealarges tuckerae³, Borealarges variabilis³, Dicranogmus lepidus² Borealarges tuckerae³ Adrain 1994 trilobite Borealarges variabilis³ Campbell and Chatterton 2007 trilobite Dicranogmus lepidus² Campbell and Chatterton 2006 trilobite

¹Adrain and Chatterton 1994; ²Campbell and Chatterton 2006; ³Campbell and Chatterton 2007; ⁴Chatterton and Perry 1984; ⁵Edgecombe and Chatterton 1993; ⁶Siveter and Chatterton 1996