†family Troedssonellidae Kobayashi 1935 (mollusk)
Cephalopoda - Dissidocerida - Troedssonellidae
Parent taxon: Dissidocerida according to D.H. Evans 2011
See also Crick 1981, Evans 2005, Hook and Flower 1977, Kröger and Evans 2011 and Zhuravleva 1994
Sister taxa: Bajkaloceratidae, Dissidocerataceae, Geisonoceratidae, Intejoceratidae, Polymeridae, Rangeroceratidae, Troedssonellaceae
Subtaxa: Buttsoceras Cyclobuttsoceras Moridunoceras Oxfordoceras Sheshanoceras Tajaroceras Thoraloceras Troedssonella
Type: Troedssonella
Ecology: fast-moving nektonic carnivore
Distribution:
• Arenig of China (1 collection)
• Dawan of China (2)
• Ordovician of Australia (4), China (1), France (3), Sweden (1), the United Kingdom (10), United States (6: Alabama, New Mexico)
Total: 28 collections including 29 occurrences