Trilobita - Corynexochida - Leiostegiidae
Parent taxon: Leiostegioidea according to S. R. Westrop 2013
See also Adrain 2011, Fortey and Bruton 2013, Harrington and Leanza 1957, Peng 1990, Robison and Pantoja-Alor 1968 and Whittington et al. 1997
Sister taxa: Kaolishaniidae, Missisquoiidae
Subtaxa: Aedotes Agerina Annamitella Arcifimbria Brackebuschia Chiawangella Cholopilus Chosenia Chuangiella Chuangioides Chuangiopsis Eochuangia Geminiclavula Iranaspis Kepisis Leiostegium Linguchuangia Lloydia Meropalla Pagodiidae Pagodiinae Plethopeltella Prochuangia Pseudocalymene Reubenella Schantungia Tinaspis Trephina Wanshania
Ecology: nektobenthic carnivore
Distribution:
• Whiterockian of United States (1: California collection)
• Volkhov of the Russian Federation (11), Sweden (2)
• Valaste of Sweden (1)
• Langevoja of Sweden (6)
• Arenig of Argentina (11), Australia (3), China (21), Sweden (1), United States (2: Montana, North Dakota)
• Dawan of China (2)
• Arenigian of China (14), United States (1: Maine)
• Ordovician of Argentina (14), Australia (2), Canada (9: Alberta, Newfoundland, Newfoundland and Labrador, Northwest Territories), China (30), the Czech Republic (1), Iran (3), Ireland (1), Kazakhstan (5), Morocco (2), Norway (1), the Russian Federation (1), Sweden (3), United States (26: Idaho, Maine, Montana, Nevada, New Mexico, North Dakota, Texas, Utah)
• Cressagian of South Korea (1)
• Tremadoc of Argentina (12), Bolivia (1), Canada (11: Alberta, Newfoundland and Labrador, Northwest Territories), China (28), the Czech Republic (2), Mexico (1), Sweden (2), United States (1: Vermont)
• Skullrockian of Argentina (1), United States (1: Nevada)
• Cambrian of Argentina (3), Australia (23), Canada (12: Newfoundland and Labrador, Quebec), China (62), France (1), Iran (1), Kazakhstan (21), South Korea (3), Turkey (3), United States (13: Alaska, Idaho, South Dakota, Texas, Vermont)
• Taoyuanian of China (1), South Korea (18), Turkey (1)
Total: 397 collections including 467 occurrences