Parent taxon: Arthropoda according to J. Vannier et al. 2007
Sister taxa: Actaeus, Agonata, Almenia, Aptera, Arachnoidea, Armadillidium molassicum, Armadillidium payangadensis, Blattina splendens, Bradoriida, Branchiata, Bundenbachiellus, Burgessia, Clypecaris, Crustacea, Dalmaniopsis, Devonopilio, Devonopilio hutchinsoni, Dicerocaris, Dinopilio parvus, Dongshanocaris, Douglasocaris, Emeiella, Ercaia, Esmeraldacaris, Euthycarcinoidea, Forfexicaris, Gaoqiaioella, Geracus, Geracus tubifer, Gigantopleurida, Goticaris, Guangweicarididae, Habelia, Hanburia, Henningsmoenicaris, Huangshandongia, Jianfengia, Kablikia, Kampecaris obanensis, Keurbos, Kleptothule, Kounicia, Liantuoia, Longquania, Marrelomorpha, Meristosoma, Merostomoidea, Monoculus, Motina, Myriapoda, Naptile, Notchia, Occacaris, Odaraiida, Orstenocarida, Palaeophonus arctus, Panlongia, Paratrilobita, Parvancorinomorpha, Parvibellus, Pauloterminus, Pedestria, Pisinnocaris, Platicytes, Plenocaris, Pleurolycosa, Pleurolycosa prolifera, Poliochera pustulatus, Priscansermarinus, Proricaris, Protocaris, Pseudoiulia, Pycnogonida, Pygmaclypeatus, Rhynimonstrum, Schizodiscus, Scorpionida, Serracaris, Shankouia, Skaracarida, Sunellidae, Synistata, Tanglangia, Unogata, Utahcaris, Zagoracaris, Proschizoramia, Dinocarida, Hadranax, Marrellomorpha, Youti, Radiodonta, Papiliomaris, Siberion, Deuteropoda, Megadictyon, Artiopoda, Parioscorpio, Arachnomorpha
Subtaxa: Tuzoiidae
Ecology:
Distribution:
• Whiterockian of United States (1: Utah collection)
• Cambrian of Australia (1), Canada (7: British Columbia), China (9), United States (15: Nevada, Pennsylvania, Utah, Vermont)
• Solvan of Canada (1: British Columbia), Czechia (1), United States (1: Nevada)
Total: 36 collections including 50 occurrences