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