Also known as Canadian Arctic Archipelago
Where: Nunavut, Canada (68.9° N, 114.3° W: paleocoordinates 0.9° S, 55.6° W)
• coordinate estimated from map
• outcrop-level geographic resolution
When: Tremadocian (485.4 - 477.7 Ma)
• Flower (1964 pp. 74, 75) says that the Cephalopods from the Read and Sutton islands are of Canadian (Lower Ordovician) age whereas Miller & Youngquist (1947) say that the rocks on both the islands are Late Ordovician in age.
• formation-level stratigraphic resolution
Environment/lithology: gray dolomite
Size class: macrofossils
Preservation: cast, recrystallized, original calcite, replaced with dolomite, replaced with silica
Reposited in the YPM
Collection methods: surface (float), surface (in situ)
• "The majority of the specimens were found in situ, but some of them were collected from loose boulders. A few were picked up by Eskimos." is a general statement and does not inevitably apply to all of Miller and Youngquist's (1947) collecting localities.
Primary reference: R. H. Flower. 1964. The Nautiloid Order Ellesmeroceratida (Cephalopoda). State Bureau of Mines and Mineral Resources New Mexico Institute of Mining and Technology, Memoir 12:234 p. [B. Kröger/T. Liebrecht/P. Wagner]more details
Purpose of describing collection: taxonomic analysis
PaleoDB collection 88892: authorized by Björn Kröger, entered by Torsten Liebrecht on 24.04.2009
Creative Commons license: CC BY (attribution)
Taxonomic list
Cephalopoda | |
Boreoceras washburni n. gen. n. sp., Boreoceras cloudi n. sp., Boreoceras ovale, Boreoceras brevicameratum
Boreoceras washburni n. gen. n. sp. Miller and Youngquist 1947 YPM 17312A (holotype), not explicitly stated which of the other given catalog numbers belongs to the second specimen (a paratype), presumably it is YPM 17312B
Boreoceras ovale Flower 1964 17311B (part), 17312 (part, paratype); both have been assigned to B. brevicameratum by Miller & Youngquist (1947)
Boreoceras brevicameratum Miller and Youngquist 1947 YPM 17311B (part, paratype), 17312 (part, 3 paratypes)
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