Anthozoa - Stauriida - Pycnostylidae
Parent taxon: Stauriina according to D. Hill 1981
See also Merriam 1972
Sister taxa: Amplexidae, Centristelidae, Kiziliidae, Neocolumnariidae, Siphonophrentidae, Stauriidae
Subtaxa: Cyathopaedium Depasophyllum Fletcherina Pycnostylus Synamplexus Thecacristatus Zelophyllum
Ecology: stationary epifaunal suspension feeder
Distribution:
• Devonian of Canada (2: Ontario collections), Germany (6), the Russian Federation (3), Tajikistan (5), United States (4: Nevada, New York)
• Silurian to Devonian of Pakistan (1)
• Silurian of Australia (4), Canada (8: Manitoba, Ontario), China (9), Mongolia (2), the Russian Federation (2), Sweden (1), Tajikistan (1), United States (16: Alaska, California, Iowa, Oklahoma, Pennsylvania, Virginia), Uzbekistan (1)
Total: 65 collections including 72 occurrences