Sphaeronitida - Sphaeronitidae
Alternative spelling: Sphaeronitoidea
Parent taxon: Sphaeronitida according to S. Sheffield and C. Sumrall 2017
See also Beaver et al. 1967, Bockelie 1984, Jell 2010, Mergl and Prokop 2006, Paul and Bockelie 1983, Prokop 1964 and Regnéll 1945
Sister taxa: Aristocystitidae, Holocystitidae
Subtaxa: Allocystites Archaegocystis Archegocystis Barbieria Bulbocystis Diplosphaeronis Eucystis Haplosphaeronis Paleosphaeronites Sphaeronites Tetreucystis Tholocystis
Distribution:
• Devonian of Czechia (8 collections)
• Silurian of Australia (1), United States (1: Indiana)
• Arenig of China (1)
• Ordovician of Belarus (1), Belgium (5), China (3), Czechia (7), Estonia (3), Iran (2), Norway (26), Spain (2), Sweden (45), the United Kingdom (8)
Total: 113 collections including 127 occurrences