Parent taxon: Rhodophyceae according to W. Kiessling 2003
Sister taxa: Acrochaetium, Angulocellularia, Angusticellularia, Aoujgaliaceae, Archaeolithophyllales, Arthrodendron, Calcifoliida, Florideae, Foliophycus, Lomentarites, Solenoporaceae
Subtaxa: Asterocalculus Diversocallis Gymnocodium Nanjinophycus Permocalculus Succodium
Ecology: stationary epifaunal "photoautotroph"
Distribution:
• Paleocene to Eocene of India (1 collection)
• Cretaceous of Egypt (7), France (5), Germany (3), Iran (3), Iraq (14), Oman (1), Portugal (6), Romania (5), United States (1: Arizona)
• Jurassic of Indonesia (1), Lebanon (1), Mexico (1), Morocco (1), Portugal (2), Spain (1)
• Triassic of Croatia (1), Italy (2), the Russian Federation (1)
• Permian of Afghanistan (2), Armenia (7), Azerbaijan (7), Bosnia and Herzegovina (1), China (75), Croatia (5), Greece (4), Indonesia (1), Iran (1), Italy (3), Japan (1), Malaysia (1), Oman (3), Pakistan (1), Saudi Arabia (1), Serbia and Montenegro (2), Slovenia (1), Tajikistan (1), Thailand (1), Tunisia (4), Turkey (1), United States (7: Nevada, Texas)
Total: 187 collections including 276 occurrences