Parent taxon: Euarthropoda according to M. R. Smith and J. Ortega-Hernández 2014
See also Briggs et al. 2008, Pates et al. 2021 and Sepkoski 2002
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, Hexapoda, Huangshandongia, Jianfengia, Jiucunella, Kablikia, Kampecaris obanensis, Kleptothule, Kounicia, Liantuoia, Libellula carbonaria, Longquania, Marrelomorpha, Meristosoma, Merostomoidea, Molaria, Monoculus, Motina, Myriapoda, Naptile, Notchia, Occacaris, Odaraiida, Orstenocarida, Palaeophonus arctus, Panlongia, Paratrilobita, Parioscorpio, Parvancorinomorpha, Parvibellus, Pauloterminus, Pedestria, Pisinnocaris, Platicytes, Plenocaris, Pleurolycosa, Pleurolycosa prolifera, Poliochera pustulatus, Priscansermarinus, Proricaris, Protocaris, Pseudarthron, Pseudoiulia, Pycnogonida, Pygmaclypeatus, Rhombicalvaria, Rhynimonstrum, Schizodiscus, Scorpionida, Serracaris, Shankouia, Skaracarida, Synistata, Tanglangia, Tuzoida, Unogata, Utahcaris, Walossekia, Proschizoramia, Siberion, Hadranax, Marrellomorpha, Artiopoda, Deuteropoda, Arachnomorpha, Dinocarida, Megadictyon
Subtaxa: Amplectobeluidae Anomalocarididae Caryosyntrips Cerabonusoides Cetiocaridae Hurdiidae Kerygmachela Laggania Myoscolex Tamisiocarididae
Ecology: fast-moving nektonic carnivore
Distribution:
• Devonian of Germany (1 collection)
• Tremadoc of Morocco (1)
• Solvan of Canada (2: British Columbia), the Czech Republic (1), United States (1: Nevada)
• Delamaran of Canada (27: British Columbia), United States (5: Nevada, Utah)
• Cambrian of Australia (2), Canada (9: Brithish Columbia, British Columbia), China (43), Greenland (4), Poland (1), United States (26: California, Nevada, Pennsylvania, Utah, Vermont)
• Waucoban of Canada (1: Northwest Territories)
Total: 124 collections including 200 occurrences