†family Opabiniidae Walcott 1912
Parent taxon: Panarthropoda according to S. Pates et al. 2022
Sister taxa: Arthropoda, Aysheaiidae, Dinocaridida, Lobopodia, Luolishaniida, Onychodictyon, Tardigrada, Xenusia
Distribution:
• Ordovician of the United Kingdom (1 collection)
• Cambrian of Canada (2: British Columbia), United States (1: Utah)
Total: 4 collections each including a single occurrence