Parent taxon: Syntrophiidina according to M. Liljeroth et al. 2017
See also Popov et al. 2005
Sister taxa: Camerelloidea, Porambonitacea, Porambonitoidea
Subtaxa: Porambonitidae
Ecology: stationary epifaunal suspension feeder
Distribution:
• Dobrotivian of France (2 collections)
• Whiterockian of Canada (1: Newfoundland and Labrador), United States (1: Nevada)
• Volkhov of the Russian Federation (30)
• Vaana of Estonia (1)
• Dawan of China (3)
• Arenig of China (3), the United Kingdom (1)
• Arenigian of the Russian Federation (1)
• Ordovician of Argentina (1), Belarus (1), Canada (2: Newfoundland, Quebec), China (6), Estonia (29), France (3), Iran (3), Ireland (5), Latvia (3), Lithuania (2), Norway (13), Portugal (1), the Russian Federation (14), Spain (1), the United Kingdom (5)
Total: 132 collections including 149 occurrences