Parent taxon: Euarthropoda according to J. Moysiuk et al. 2022
See also Legg 2015 and Sepkoski 2002
Sister taxa: Actaeus, Agonata, Almenia, Aptera, Arachnoidea, Armadillidium molassicum, Armadillidium payangadensis, Blattina splendens, Bradoriida, Branchiata, Bundenbachiellus, Burgessia, Clypecaris, Crustacea, Dalmaniopsis, Devonopilio, Devonopilio hutchinsoni, Dicerocaris, Dinopilio parvus, Dongshanocaris, Douglasocaris, Emeiella, Ercaia, Esmeraldacaris, Euthycarcinoidea, Forfexicaris, Gaoqiaioella, Geracus, Geracus tubifer, Gigantopleurida, Goticaris, Guangweicarididae, Habelia, Hanburia, Henningsmoenicaris, Huangshandongia, Jianfengia, Kablikia, Kampecaris obanensis, Keurbos, Kleptothule, Kounicia, Liantuoia, 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, Parioscorpio, Hadranax, Dinocarida, Arachnomorpha, Artiopoda, Siberion, Deuteropoda, Radiodonta, Papiliomaris, Youti, Megadictyon, Proschizoramia
Subtaxa: Marrellida
Ecology:
Distribution:
• Devonian of Germany (1 collection)
• Letna of Czechia (1)
• Ordovician of Canada (1: Ontario), Czechia (1), Morocco (1), the United Kingdom (1)
• Cambrian of Canada (29: Brithish Columbia, British Columbia), China (2)
Total: 37 collections each including a single occurrence