Trilobita - Corynexochida - Missisquoiidae
Parent taxon: Leiostegioidea according to S. R. Westrop 2013
See also Adrain 2011 and Jell and Adrain 2002
Sister taxa: Kaolishaniidae, Leiostegiidae
Subtaxa: Hardyia Lunacrania Parakoldinioidia Pseudokoldinioidia Tasmanocephalus
Ecology: nektobenthic carnivore
Distribution:
• Ordovician to Cambrian of United States (2: New York collections)
• Ordovician of Australia (2), Canada (8: Alberta, Newfoundland and Labrador), China (1), United States (4: Nevada, New Mexico, New York, Vermont)
• Arenig of China (1)
• Cambrian to Ordovician of United States (1: New York)
• Cambrian of Australia (4), Canada (10: Alberta, Newfoundland and Labrador), China (9), United States (6: New Mexico, New York, Texas)
Total: 48 collections including 52 occurrences