Trilobita - Asaphida - Dikelocephalidae
Synonym: Saukiidae Ulrich and Resser 1930
Parent taxon: Dikelocephaloidea according to S. J. Wernette et al. 2020
See also Adrain 2011, Robison and Pantoja-Alor 1968 and Whittington et al. 1997
Sister taxa: Dikelocephaliidae, Ptychaspididae
Subtaxa: Anderssonella Calvinella Caznaia Diemanosaukia Eosaukia Galerosaukia Hamashania Lichengia Linguisaukia Lophoholcus Lophosaukia Mictosaukia Prosaukia Pseudocalvinella Saukia Saukiella Sinosaukia Stigmaspis Suluderella Tellerina
Ecology: fast-moving low-level epifaunal carnivore
Distribution:
• Ordovician of Canada (1: Yukon collection), the Russian Federation (2)
• Tremadoc of Antarctica (1), Mexico (3), the Russian Federation (1)
• Skullrockian of Canada (3: Alberta, British Columbia), United States (2: Texas)
• Cambrian of Australia (26), Canada (24: Alberta, Newfoundland, Newfoundland and Labrador, Quebec, Yukon), China (28), Iran (2), Kazakhstan (15), South Korea (4), Turkey (1), United States (101: Alaska, Colorado, Minnesota, Missouri, Montana, Nevada, New York, South Dakota, Texas, Utah, Vermont, Virginia, Wisconsin, Wyoming)
• Taoyuanian of China (7)
Total: 221 collections including 346 occurrences