Anthozoa - Cystiphyllida - Tryplasmatidae
Parent taxon: Tryplasmatidae according to D. Hill 1981
Sister taxa: Loboplasma, Porpites, Storthygophyllum, Thecaspinellum
Subtaxa: Aphyllum Bowanophyllum Cantrillia Hillophyllum Maikottia Neotryplasma Polyorophe Rhabdelasma Stortophyllum Tryplasma Wenlockia
Ecology: stationary epifaunal suspension feeder
Distribution:
• Permian of the Russian Federation (4 collections)
• Devonian of Australia (16), Austria (1), Canada (2: Nunavut), China (5), Italy (3), Mongolia (1), the Russian Federation (16), Spain (2), Tajikistan (19), United States (23: Alaska, Nevada, New York, Pennsylvania), Vietnam (6)
• Silurian to Devonian of Australia (1), Pakistan (1), Tajikistan (2)
• Silurian of Australia (17), Belarus (1), Canada (19: Manitoba, Northwest Territories, Nunavut, Quebec, Yukon), China (24), the Czech Republic (2), Greenland (1), India (2), Japan (2), Mongolia (5), the Russian Federation (10), Svalbard and Jan Mayen (1), Sweden (6), Tajikistan (3), Ukraine (11), the United Kingdom (2), United States (18: Alaska, California, Indiana, Kentucky, Nevada, New Hampshire, Oklahoma, Pennsylvania, Virginia), Uzbekistan (1), Venezuela (1)
• Ordovician to Silurian of United States (1: Alaska)
• Ordovician of Australia (18), Canada (4: Manitoba), China (9), Estonia (9), Norway (3), Sweden (2), United States (5: Alaska, Nevada, Utah, Texas)
Total: 279 collections including 339 occurrences