Parent taxon: Rhodophyta according to Luchinina and Terleev 2008
Sister taxa: Anomalophycus, Cambrinaceae, Chenilleophycus, Cretacicrusta, Eurhodophytina, Guangxilamina, Kordephyton, Leveilleites, Menselina, Metarhodophytina, Pasinia, Pseudokomia, Rhodellophytina, Rhodophyceae, Sajania, Stacheinaceae, Stenogrammites, Tetradium, Waputikia
Distribution:
• Devonian of Australia (1 collection), Canada (1: Alberta), China (3), Germany (1), the Russian Federation (2), Tajikistan (2)
• Silurian to Devonian of United States (1: Alaska)
• Silurian of Canada (1: Ontario), the Russian Federation (2), United States (3: Alaska)
• Arenig of Canada (3: Newfoundland and Labrador), United States (1: Oklahoma)
• Ordovician of China (4), Malaysia (1), South Korea (1), United States (1: Texas)
• Cambrian of Antarctica (1), Australia (9), Canada (7: British Columbia, Newfoundland and Labrador, Northwest Territories, Yukon), China (5), Germany (3), India (1), Italy (12), Kyrgyzstan (1), Mexico (1), Mongolia (6), Morocco (5), the Russian Federation (41), South Korea (1), Spain (5), United States (6: Nevada, Texas, Virginia)
• Ediacaran of China (1)
Total: 133 collections including 149 occurrences