Cyclostomatida or Cyclostomata, are an order of stenolaemate bryozoans consisting of 7+ suborders, 59+ families, 373+ genera, 666+ species. * Suborder Articulina (2+ Families, 9+ Genera, 10+ Species) * Family Crisiidae (8+ Genera, 9+ Species) * Family Crisuliporidae (1+ Genera, 1+ Species) * Suborder (4+ Families, 4+ Genera, 47+ Species) * Family Corynotrypidae (4+ Genera, 27+ Species) * Family Sagenellidae (2+ Genera, 2+ Species) * Family Crownoporidae (7+ Genera, 17+ Species) * Family Kukersellidae (1+ Genera, 1+ Species) * Suborder Tubuliporina (22 Families, 175+ Genera, 384+ Species) * Family Stomatoporidae (8+ Genera, 16+ Species) * Family Cinctiporidae (4+ Genera, 8+ Species) * Family Oncousoeciidae (5+ Genera, 47+ Species) * Family Oncousoeciidae (22+ Genera, 69+ Speci