Parent taxon: Arthropoda according to J. J., Jr. 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, Molaria, Monoculus, Motina, Myriapoda, Naptile, Notchia, Occacaris, Odaraiida, Orstenocarida, Palaeophonus arctus, Panlongia, Paratrilobita, Parioscorpio, Parvancorinomorpha, 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, Marrellomorpha, Megadictyon, Artiopoda, Radiodonta, Hadranax, Deuteropoda, Arachnomorpha, Dinocarida, Jianshanopodia, Siberion, Proschizoramia
Subtaxa: Emeraldellida Limulavida Nathorsthia
Ecology: