Parent taxon: Cyanophyceae according to D. Vachard et al. 2016
See also Vachard and Aretz 2004
Sister taxa: Aphralysiaceae, Baratangia, Cayeuxia, Protorivularia, Ramivaginalis, Rivularites, Shermanophycus, Stylophycus, Weedia
Subtaxa: Baccanella Bacinella Clinortonella Garwoodia Nostocites Ortonella Ortonellopsis
Ecology: stationary "photoautotroph"
Distribution:
• Cretaceous of Albania (1 collection), Austria (1), Bulgaria (2), Croatia (3), Egypt (2), France (13), Germany (7), Greece (3), Hungary (1), Iran (1), Italy (16), the Marshall Islands (1), Oman (5), Portugal (14), Romania (8), Somalia (1), Spain (4), Tunisia (1), Türkiye (1)
• Jurassic to Cretaceous of Japan (1)
• Jurassic of Austria (2), Czechia (3), France (2), Germany (3), Greece (1), Indonesia (1), Italy (11), Morocco (2), Myanmar (1), Portugal (6), Slovenia (2), Spain (3), Switzerland (1), Thailand (1), Tunisia (1), Ukraine (1)
• Triassic of Austria (16), Germany (4), Greece (4), Hungary (1), Indonesia (1), Iran (3), Israel (1), Italy (25), Japan (5), Malaysia (1), Oman (2), the Philippines (1), Romania (1), Serbia (1), Slovakia (2), Slovenia (8), Spain (1), Thailand (1), Türkiye (3), United States (1: Oregon)
• Permian of Iran (1), Oman (1), Tajikistan (4), Türkiye (1), United States (1: Texas)
• Carboniferous of Australia (1), Belgium (1), China (3), France (1), Ireland (1), Japan (3), the Russian Federation (1), Spain (1), the United Kingdom (5), United States (4: Arkansas, Colorado, Oklahoma)
• Devonian of Australia (4), Austria (1), China (7), Germany (2), Italy (1), the Russian Federation (4), United States (1: New York)
• Silurian of Canada (1: Québec)
• Ordovician of Canada (2: Ontario, Quebec), China (3), the Russian Federation (3)
• Cambrian of Italy (1)
Total: 268 collections including 341 occurrences