Sunblood Mountain Calyptaulax-Ceraurinella Biofacies (A-140) (Ordovician of Canada)

Also known as A 140

Where: Northwest Territories, Canada (61.6° N, 125.8° W: paleocoordinates 5.5° N, 59.9° W)

• coordinate stated in text

• outcrop-level geographic resolution

When: Esbataottine Formation, Chazyan (468.1 - 460.9 Ma)

• formation-level stratigraphic resolution

Environment/lithology: deep subtidal; argillaceous, silty limestone

Size classes: macrofossils, microfossils

Preservation: replaced with silica

Primary reference: B. D. E. Chatterton and R. Ludvigsen. 1976. Silicified Middle Ordovician trilobites from the South Nahanni River Area, District of Mackenzie, Canada. Palaeontographica Abteilung A 154(1-3):1-106 [S. Holland/T. Hanson/T. Hanson]more details

Purpose of describing collection: biostratigraphic analysis

PaleoDB collection 25934: authorized by Steven Holland, entered by Tori Hanson on 28.09.2002

Creative Commons license: CC BY (attribution)

Taxonomic list

Trilobita
 Corynexochida - Styginidae
Failleana calva Chatterton and Ludvigsen 1976 trilobite
 Corynexochida - Illaenidae
Nanillaenus mackenziensis Chatterton and Ludvigsen 1976 trilobite
Nanillaenus aduncus Chatterton and Ludvigsen 1976 trilobite
"Bumastus (Bumastoides) lenzi" = Bumastoides lenzi Chatterton and Ludvigsen 1976 trilobite
 Odontopleurida - Odontopleuridae
Apianurus parabarbatus Chatterton and Ludvigsen 1976 trilobite
 Phacopida - Pterygometopidae
Calyptaulax callirachis Cooper 1953 trilobite
 Phacopida - Encrinuridae
Cybeloides cimelia Chatterton and Ludvigsen 1976 trilobite
 Phacopida - Cheiruridae
Acanthoparypha evitti Chatterton and Ludvigsen 1976 trilobite
Ceraurinella nahanniensis Chatterton and Ludvigsen 1976 trilobite
Ceraurinella kingstoni Chatterton and Ludvigsen 1976 trilobite
 Harpida - Harpetidae
Dolichoharpes aff. reticulata Whittington 1949 trilobite
 Asaphida - Asaphidae
Isotelus parvirugosus Chatterton and Ludvigsen 1976 trilobite
 Asaphida - Remopleurididae
Remopleurides pattersoni Chatterton and Ludvigsen 1976 trilobite
 Lichida - Lichidae
Hemiarges turneri Chatterton and Ludvigsen 1976 trilobite
Amphilichas aff. aspratilis Bradley 1930 trilobite