Parent taxon: Cryptostomata according to A. Ernst et al. 2015
See also Ernst 2000, Ernst and Carrera 2008, Jiménez-Sánchez 2009, Lobdell 1992 and Sakagami 1998
Sister taxa: Artchedella, Cryptostyloecia, Cycloporidae, Eichwaldictya, Europora, Eurythyrhombopora, Fenestelloidea, Ipmorella, Kielanopora, Nemacanthclema, Nemacanthopora, Nudymiella, Palaeocoryne, Palescharidae, Paranicklespora, Phaenophragma, Primarella, Promediapora, Pseudoascopora, Ptilodictyina, Ptilodictyoidea, Rhabdomesoidae, Rhabdomesontidae, Rhinidictyonidae, Rhinoporidae, Rozonovia, Shishoviclema, Silenella, Staffordotaxis, Streblopax, Strebloplax, Tamaroclema, Verella, Veroclema, Worthenoporidae, Yangotrypa
Subtaxa: Archaeomeson Arthrostylidae Bigeyella Hyphasmoporidae Nematotrypidae Streblotrypidae
Ecology: stationary epifaunal suspension feeder
Distribution:
• Permian of Afghanistan (5 collections), Armenia (3), Australia (12), Austria (3), Azerbaijan (1), Bolivia (1), Canada (6: British Columbia, Nunavut), China (19), East Timor (2), Greenland (5), India (1), Indonesia (2), Iran (25), Italy (2), Japan (4), Malaysia (1), Mongolia (3), Nepal (1), Oman (20), Pakistan (1), Peru (3), the Russian Federation (58), Slovenia (1), Svalbard and Jan Mayen (9), Tajikistan (4), Thailand (5), Tunisia (1), the United Arab Emirates (2), United States (5: Arizona, Nevada, Texas, Washington)
• Carboniferous of Antarctica (1), Australia (5), China (1), France (1), Germany (2), Ireland (1), Japan (4), Mexico (1), Mongolia (1), Peru (1), the Russian Federation (1), Spain (9), the United Kingdom (5), United States (55: Alabama, Alaska, Arizona, Indiana, New Mexico, Oklahoma, Tennessee, Texas, Utah)
• Devonian of Argentina (1), the Czech Republic (3), Germany (8), Iran (1), United States (26: Indiana, Michigan, Missouri, Ohio)
• Silurian of Belarus (1), Canada (4: Ontario), China (1), India (1), Norway (2), the Russian Federation (8), Sweden (2), the United Kingdom (4), United States (42: New York)
• Chazyan of Canada (5: Northwest Territories), United States (2: Vermont)
• Volkhov of Estonia (1)
• Ordovician of Argentina (2), Australia (1), Canada (15: Manitoba, Northwest Territories, Nunavut, Ontario, Quebec), Estonia (6), France (2), India (3), Italy (1), Mongolia (1), Morocco (1), Norway (2), the Russian Federation (1), Spain (13), Sweden (9), United States (63: Georgia, Illinois, Indiana, Minnesota, Nevada, New York, North Dakota, Ohio, Tennessee, Virginia, Wyoming)
Total: 525 collections including 702 occurrences