Fauna j, Section AV5, 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 based on nearby landmark

• 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. I'm assuming AV5 can be correlated as well.) See PBDB ref. 7215.

• group of beds-level stratigraphic resolution

Environment/lithology: slope; argillaceous limestone and shale

• Grand Cycle 3.

•SEP environmental call based primarily on PBDB ref. 7215.

• "...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..." (PBDB ref. 7215)

Preservation: replaced with silica

Primary reference: D. J. Siveter and B. D. E. Chatterton. 1996. Silicified calymenid trilobites from the Mackenzie Mountains, northwest Canada. Palaeontographica Abteilung A 239(1-3):43-60 [M. Foote/M. Foote/M. Foote]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 26058: 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
Rhynchonellata
 Protorthida - Skenidiidae
Skenidioides operosa3
Skenidioides operosa3 Johnson et al. 1976
 Rhynchonellida - Trigonirhynchiidae
Hercotrema pentaforma3
 Orthida - Dicoelosiidae
Epitomyonia amplissima3
 Orthida - Dalmanellidae
Isorthis (Arcualla) microscapha3, Isorthis (Arcualla) boreaina3
Isorthis (Arcualla) microscapha3 Johnson et al. 1976
 Atrypida - Atrypidae
Atrypa (Gotatrypa) variabilis3
Atrypa (Gotatrypa) variabilis3 Johnson et al. 1976
Strophomenata
 Strophomenida - Furcitellidae
Pentlandina harperi3
Pentlandina harperi3 Zhang 1989
 Strophomenida - Sowerbyellidae
Eoplectodonta (Eoplectodonta) paucicostellata3
 Strophomenida - Strophodontidae
"Brachyprion (Protomegastrophia) sp." = Megastrophia (Protomegastrophia)3
"Brachyprion (Protomegastrophia) sp." = Megastrophia (Protomegastrophia)3 Caster 1939
 Orthotetida - Chilidiopsidae
Morinorhynchus crispus3
Morinorhynchus crispus3 Lindström 1861
Trilobita
 Phacopida - Calymenidae
Diacalymene gabrielsi, Calymene polgari
Diacalymene gabrielsi Siveter and Chatterton 1996 trilobite
Calymene polgari Siveter and Chatterton 1996 trilobite
C. (s.l.)
 Phacopida - Encrinuridae
Struszia (Avalanchurus) lennoni n. sp.2
 Proetida - Otarionidae
Otarion huddyi n. sp.1
Otarion huddyi n. sp.1 Adrain and Chatterton 1994 trilobite
1Adrain and Chatterton 1994; 2Edgecombe and Chatterton 1993; 3Jin and Chatterton 1997