Parent taxon: Arthropoda according to J. Vannier et al. 2007
Sister taxa: Actaeus, Agonata, Almenia, Aptera, Arachnoidea, Blattina splendens, Bradoriida, Branchiata, Bundenbachiellus, Burgessia, Clypecaris, Cryptocaris, Dalmaniopsis, Devonopilio, Devonopilio hutchinsoni, Dicerocaris, Dinopilio parvus, Dongshanocaris, Douglasocaris, Emeiella, Ercaia, Esmeraldacaris, Euthycarcinoidea, Forfexicaris, Gaoqiaioella, Geracus, Geracus tubifer, Gigantopleurida, Goticaris, Graeophonus, Guangweicarididae, Habelia, Hanburia, Henningsmoenicaris, Huangshandongia, Jianfengia, Jiucunella, Kablikia, Kampecaris obanensis, Keurbos, Kleptothule, Kounicia, Liantuoia, Libellula carbonaria, 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, Synistata, Tanglangia, Unogata, Utahcaris, Zagoracaris, Siberion, Artiopoda, Arachnomorpha, Hadranax, Megadictyon, Deuteropoda, Youti, Radiodonta, Marrellomorpha, Dinocarida, Parioscorpio, Proschizoramia
Subtaxa: Tuzoiidae
Ecology:
Distribution:
• Whiterockian of United States (1: Utah collection)
• Cambrian of Australia (1), Canada (7: British Columbia), China (7), United States (15: Nevada, Pennsylvania, Utah, Vermont)
• Solvan of Canada (1: British Columbia), Czechia (1), United States (1: Nevada)
Total: 34 collections including 43 occurrences