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

Where: Northwest Territories, Canada (62.4° N, 127.0° W: paleocoordinates 4.7° N, 49.3° W)

• coordinate estimated from map

• outcrop-level geographic resolution

When: Kockelella patula zone, Delorme Formation, Whitwellian (426.2 - 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, middle part.

•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 26048: authorized by Michael Foote, entered by Michael Foote on 01.10.2002, edited by Melanie Hopkins

Creative Commons license: CC BY (attribution)

Taxonomic list

 Odontopleurida - Odontopleuridae
"Xanionurus norfordi" = Radiaspis trilobite
Leonaspis lenzi trilobite
"Ceratocephalina charlesworthi" = Ceratocephala (Ceratocephalina) trilobite
"Ceratocephalina sevastopuloi" = Ceratocephala (Ceratocephalina) trilobite
 Aulacopleurida - Aulacopleuridae
Cyphaspis munii n. sp.3 trilobite
Otarion huddyi n. sp.1 trilobite
Harpidella greggi n. sp.2 trilobite
 Phacopida - Encrinuridae
 Phacopida - Cheiruridae
Parayoungia eleyae7 Chatterton and Perry 1984 trilobite
Parayoungia tuberculata7 Chatterton and Perry 1984 trilobite
Hyrokybe sp. n. sp.7 Lane 1972 trilobite
n. sp. A
Hyrokybe julli7 Chatterton and Perry 1984 trilobite
Hyrokybe hadnagyi7 Chatterton and Perry 1984 trilobite
Deiphon grovesi7 trilobite
Hadromeros scotti7 trilobite
Sphaerexochus johnstoni7 Chatterton and Perry 1984 trilobite
Sphaerexochus dimorphus7 Whittington and Evitt 1953 trilobite
 Phacopida - Calymenidae
Diacalymene gabrielsi11 Siveter and Chatterton 1996 trilobite
Calymene polgari11 Siveter and Chatterton 1996 trilobite
C. (s.l.)
 Lichida - Lichidae
Radiolichas guttatus5 Campbell and Chatterton 2006 trilobite
Borealarges variabilis n. sp.6 Campbell and Chatterton 2007 trilobite
Borealarges renodis n. sp.6 Campbell and Chatterton 2007 trilobite
Dicranogmus lepidus n. sp.5 Campbell and Chatterton 2006 trilobite
Dicranogmus wilsoni n. sp.5 Campbell and Chatterton 2006 trilobite
Dicranopeltis sp.5 Hawle and Corda 1847 trilobite
 Palaeocopida -
Severella arctosulcata9 Zhang 1989 ostracod
 Orthotetida - Chilidiopsidae
 Strophomenida - Sowerbyellidae
 Strophomenida - Aegiromenidae
Jonesea grayi9 Davidson 1849
Jonesea cocksi9 Zhang 1989
 Strophomenida - Rafinesquinidae
"Leptaena depressa" = Leptaena (Leptaena) depressa9 Sowerby 1824
 Strophomenida - Strophodontidae
 Strophomenida - Strophomenidae
Pentlandina harperi9 Zhang 1989
Pentlandina lamelliformis9 Jin and Chatterton 1997
 Athyridida - Rhynchospirinidae
Homoeospirella multicostata9 Jin and Chatterton 1997
 Athyridida - Meristidae
Merista cuneatina9 Jin and Chatterton 1997
 Athyridida - Meristellidae
Whitfieldella sulcatina9 Jin et al. 1993
 Athyridida - Nucleospiridae
Nucleospira lentilca9 Havlicek 1990
 Spiriferida - Cyrtiidae
Cyrtia alatiformis9 Zhang 1989
Hedeina sp.9 Boucot 1957
Janius exsul9 Barrande 1848
 Spiriferida - Reticulariidae
Spirinella struszi9 Zhang 1989
 Pentamerida - Gypidulidae
Gypidula simplex9 Foerste 1909
Caryogyps chattertoni9 Zhang 1989
Caryogyps grayi9 Zhang 1989
 Pentamerida - Clorindidae
Clorinda parvolinguifera9 Sapelnikov 1972
 Pentamerida - Subrianidae
Cymbidium kirki9 Jin and Chatterton 1997
Vosmiverstum breiveli9 Zhang 1989
 Protorthida - Skenidiidae
Skenidioides operosa9 Johnson et al. 1976
 Atrypida -
Atrypoidea latilingulata9 Jin and Chatterton 1997
 Atrypida - Atrypidae
Eospinatrypa bullata9 Jin and Chatterton 1997
Atrypa (Gotatrypa) variabilis9 Johnson et al. 1976
 Atrypida - Atrypinidae
Gracianella rudicristata9 Jin and Chatterton 1997
Spirigerina copperi9 Zhang 1989
 Atrypida - Lissatrypidae
Septatrypa zelia9 Barrande 1879
 Rhynchonellida - Trigonirhynchiidae
Thebesia crassicostata9 Jin and Chatterton 1997
 Rhynchonellida - Rhynchotrematidae
 Orthida - Draboviidae
Salopina delta9 Johnson et al. 1976
 Orthida - Dicoelosiidae
Dicoelosia parvifrons9 Johnson et al. 1976
Epitomyonia clausula9 Johnson et al. 1976
 Orthida - Hesperorthidae
Ptychopleurella angulaticostata9 Jin and Chatterton 1997
 Conocardiida - Pseudobigaleaidae
Avalanchia pterocarina n. gen. n. sp.4, "Cassowarioides perryi n. gen." = Cassowarioides perryi10, "Cassowarioides stelcki" = Cassowarioides perryi10, "Bigalea buskasi" = Redstonia buskasi10, "Bigalea tercierae" = Redstonia tercierae10
Avalanchia pterocarina n. gen. n. sp.4 Caldwell and Chatterton 1995
"Cassowarioides perryi n. gen." = Cassowarioides perryi10 Johnston and Chatterton 1983
"Cassowarioides stelcki" = Cassowarioides perryi10 Johnston and Chatterton 1983
"Bigalea buskasi" = Redstonia buskasi10 Johnston and Chatterton 1983
"Bigalea tercierae" = Redstonia tercierae10 Johnston and Chatterton 1983
 Conocardiida - Bransoniidae
Mulceodens schneideri10 Johnston and Chatterton 1983