Trilobita - Olenida - Idahoiidae
Parent taxon: Olenida according to J. M. Adrain 2011
See also Jell and Adrain 2002 and Whittington et al. 1997
Sister taxa: Andrarinidae, Aphelaspidae, Asaphiscidae, Cedariidae, Dokimokephalidae, Eulomidae, Loganellidae, Olenidae, Parabolinoididae, Pterocephaliidae
Subtaxa: Comanchia Duibianaspis Langyashania Lauzonella Maladioidella Patronaspis Psalaspis Pyttstrigis Saratogia Shitaia Valtorresia Wilbernia
Ecology: fast-moving low-level epifaunal carnivore
Distribution:
• Taoyuanian of China (9 collections), the Russian Federation (4)
• Cambrian of Australia (26), Canada (18: Alberta, Quebec, Yukon), China (6), Kazakhstan (30), the Russian Federation (4), Spain (3), United States (63: Alaska, Arkansas, Idaho, Minnesota, Missouri, Montana, Nevada, New York, Oklahoma, Pennsylvania, South Dakota, Wisconsin)
Total: 163 collections including 195 occurrences