Also known as A 110
Where: Northwest Territories, Canada (61.6° N, 125.8° W: paleocoordinates 5.5° N, 59.9° W)
• coordinate estimated from map
• 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
Collection methods: Also includes ostracods.
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 25932: authorized by Steven Holland, entered by Tori Hanson on 28.09.2002, edited by Melanie Hopkins and Pete Wagner
Creative Commons license: CC BY (attribution)
Taxonomic list
unclassified | |
Strophomenata | |
"? Macrocoelia sp." = Colaptomena
"? Macrocoelia sp." = Colaptomena Cooper 1956 | |
Rhynchonellata | |
Rostricellula sp. Ulrich and Cooper 1942 | |
Chaulistomella sp. Cooper 1956 | |
Glyptorthis sp. Foerste 1914 | |
Mimella sp. Cooper 1930 | |
Trilobita | |
Dolichoharpes aff. reticulata Whittington 1949 trilobite | |
Amphilichas aff. aspratilis Bradley 1930 trilobite | |
Isotelus parvirugosus Chatterton and Ludvigsen 1976 trilobite | |
Remopleurides pattersoni Chatterton and Ludvigsen 1976 trilobite | |
Failleana calva Chatterton and Ludvigsen 1976 trilobite | |
"Bumastus (Bumastoides) lenzi" = Bumastoides lenzi Chatterton and Ludvigsen 1976 trilobite
Nanillaenus mackenziensis Chatterton and Ludvigsen 1976 trilobite
Nanillaenus aduncus Chatterton and Ludvigsen 1976 trilobite | |
"Carrickia pinguimitra" = Phorocephala pinguimitra
"Carrickia pinguimitra" = Phorocephala pinguimitra Chatterton and Ludvigsen 1976 trilobite | |
Ceratocephala triacantheis Whittington and Evitt 1953 trilobite
Apianurus parabarbatus Chatterton and Ludvigsen 1976 trilobite | |
Cybeloides cimelia Chatterton and Ludvigsen 1976 trilobite | |
Acanthoparypha evitti, Acanthoparypha echinoderma, Ceraurinella nahanniensis, Ceraurinella kingstoni, Sphaerocoryphe ludvigseni n. sp.2, Sphaerexochus arenosus, Heliomeroides freschaufae2, Holia glabra n. sp.1
Acanthoparypha evitti Chatterton and Ludvigsen 1976 trilobite
Acanthoparypha echinoderma Chatterton and Ludvigsen 1976 trilobite
Ceraurinella nahanniensis Chatterton and Ludvigsen 1976 trilobite
Ceraurinella kingstoni Chatterton and Ludvigsen 1976 trilobite
Sphaerexochus arenosus Chatterton and Ludvigsen 1976 trilobite | |
Calyptaulax callirachis Cooper 1953 trilobite |