Abstract

Cyrtograptus canadensis n. sp. and C. laqueus n. sp. are described from several localities in the South Nahanni River region, Mackenzie, Northwest Territories, and in northern Yukon. These are the oldest cyrtograptids known from northwestern Canada and range from late Llandoverian into early Wenlockian. A single specimen designated as Cyrtograptus sp. aff. C. canadensis is described from the Cape Schuchert Formation (late Llandoverian) in northernmost Greenland.

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