Florideophyceae - Cryptonemiales
Parent taxon: Florideophyceae according to R. Stockar 2000
See also Howe 1934, James et al. 1988, Parker and Dawson 1965, Souaya 1963 and Wnendt-Juber 1990
Sister taxa: Ahnfeltiophycidae, Corallinophycidae, Corallinophycidea, Dawsoniolithon, Hildenbrandiophycidae, Nemaliophycidae, Prismostylus, Rhodymeniophycidae
Subtaxa: Archaeolithophyllaceae Paleopikea Paleosiphonia
Ecology: stationary epifaunal "photoautotroph"
Distribution:
• Miocene of United States (2: California collections)
• Cretaceous of India (1)
• Permian of Canada (1: Nunavut), Oman (1), United States (3: Idaho, New Mexico, Texas)
• Carboniferous of Austria (2), France (2), Germany (1), Ireland (4), Spain (10), Thailand (2), Turkey (1), Ukraine (2), United States (18: Arkansas, Idaho, Iowa, Kansas, Missouri, New Mexico, Oklahoma, Texas)
Total: 50 collections each including a single occurrence