Fauna k, Section AV4, Delorme Fm., Mackenzie Mts. (Silurian to of Canada)

Where: Northwest Territories, Canada (62.4° N, 127.0° W: paleocoordinates 5.5° N, 50.0° 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..."

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 26049: authorized by Michael Foote, entered by Michael Foote on 01.10.2002, edited by Melanie Hopkins

Creative Commons license: CC BY (attribution)

Taxonomic list

Trilobita
 Odontopleurida - Odontopleuridae
 Aulacopleurida - Aulacopleuridae
Otarion brauni1 trilobite
 Phacopida - Encrinuridae
 Phacopida - Cheiruridae
Sphaerexochus johnstoni Chatterton and Perry 1984 trilobite
 Lichida - Lichidae
Borealarges patulus n. sp.3 Campbell and Chatterton 2007 trilobite
Borealarges tuckerae3 Adrain 1994 trilobite
Dicranogmus lepidus2 Campbell and Chatterton 2006 trilobite
Strophomenata
 Orthotetida - Chilidiopsidae
Morinorhynchus crispus5 Lindström 1861
Rhynchonellata
 Athyridida - Meristellidae
 Spiriferida - Cyrtinopsidae
Kozlowskiellina sp.5 Boucot 1958
 Spiriferida - Reticulariidae
Spirinella struszi5 Zhang 1989
 Pentamerida - Subrianidae
Conchidium microlocularis5 Johnson et al. 1976
 Orthida - Draboviidae
Salopina delta5 Johnson et al. 1976
 Orthida - Dicoelosiidae
Dicoelosia paralata5 Bassett 1972
Dicoelosia diversifrons5 Johnson et al. 1976
 Orthida - Dalmanellidae
 Orthida - Hesperorthidae
Hesperorthis martinssoni5 Bassett and Cocks 1974
Ptychopleurella lenzi5 Zhang 1989
Rostroconchia
 Conocardiida - Pseudobigaleaidae
Nehedia grovesi6 Johnston and Chatterton 1983
 Conocardiida - Bransoniidae
Mulceodens wilsoni6 Johnston and Chatterton 1983