Ulvophyceae - Bryopsidales - Codiaceae
Parent taxon: Codiaceae according to J. H. Johnson 1964
Sister taxa: Anchicodium, Aphroditicodium, Arabicodium, Bacanella, Calcipatera, Diversoporella, Doliporella, Ivanovia, Litanaia, Maslovina, Mizziella, Neoanchicodium, Orthriosiphon, Palaeocodium, Polygonella, Polymorphocodium, Protocodium, Sinuatoporella, Stylocodium, Udotoideae, Uva
Subtaxa: Hedstroemia
Ecology: stationary epifaunal "photoautotroph"
Distribution:
• Triassic of Austria (1 collection), Italy (2), Japan (1), Oman (1)
• Permian of United States (1: New Mexico)
• Givetian of China (1)
• Devonian of Australia (1), China (1), the Russian Federation (1)
• Silurian of Canada (2: Nunavut, Ontario), Sweden (2), United States (2: Alaska)
• Whiterockian of Canada (1: Newfoundland and Labrador)
• Ordovician of Canada (1: Newfoundland and Labrador), China (3), Norway (1), the Russian Federation (2), United States (1: Tennessee)
• Cambrian of Canada (1: Northwest Territories), the Russian Federation (1)
Total: 27 collections including 28 occurrences