Parent taxon: Euarthropoda according to R. Lerosey-Aubril et al. 2020
See also Lerosey-Aubril et al. 2017, Mayers et al. 2019, Ortega-Hernandez et al. 2013, Ortega-Hernandez et al. 2014 and Zeng et al. 2020
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, Kleptothule, Kounicia, Liantuoia, Libellula carbonaria, Longquania, Marrelomorpha, Meristosoma, Merostomoidea, Molaria, Monoculus, Motina, Myriapoda, Naptile, Notchia, Occacaris, Odaraiida, Orstenocarida, 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, Proschizoramia, Siberion, Radiodonta, Arachnomorpha, Marrellomorpha, Jianshanopodia, Deuteropoda, Megadictyon, Dinocarida, Hadranax
Subtaxa: Agnostida Conciliterga Falcatamacaris Kwanyinaspis Phytophilaspis Retifacies Squamacula Trilobita Trilobitomorpha Vicissicaudata