†superfamily Troedssonellaceae Kobayashi 1935 (mollusk)

Cephalopoda - Orthoceratoidea

Parent taxon: Dissidocerida according to F.A. Zhuravleva 1994

Sister taxa: Bajkaloceratidae, Dissidocerataceae, Geisonoceratidae, Intejoceratidae, Polymeridae, Rangeroceratidae, Troedssonellidae

Subtaxa: Narthecoceratidae

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Type: Troedssonella

Ecology: fast-moving nektonic carnivore

Distribution:

• Silurian of Canada (3: Ontario, Quebec collections)

• Ordovician of Canada (11: Manitoba, Northwest Territories, Ontario, Quebec), United States (1: Ohio)

Total: 15 collections including 16 occurrences

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