Parent taxon: Arthropoda according to A. P. Carignano 2012
See also Bertels 1968, Latreille 1802, Lozano-Fernandez et al. 2019, Martens et al. 2005, Martin 1904, Mason 1935, Nielsen 2012, Phleger 1933 and Riccio 1952
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, Sunellidae, Synistata, Tanglangia, Tuzoida, Unogata, Utahcaris, Zagoracaris, Dinocarida, Arachnomorpha, Marrellomorpha, Radiodonta, Parioscorpio, Hadranax, Siberion, Megadictyon, Youti, Artiopoda, Deuteropoda, Proschizoramia
Subtaxa: Bostrichopodida Bradoriamorphes Canadaspidida Edriophthalma Entomostraca Eucrustacea Malacostraca Maxillopoda Nuculina Pentapalaeopycnon Phosphatocopida Protocaridida Pycnogonites Roddyia Siphonocetes Thecostraca Waptiida