†order Archaeostraca Claus 1888 (arthropod)
Parent taxon: Phyllocarida according to F. R. Schram 1979
See also Bengtson 1992, Briggs et al. 2004, Collette and Hagadorn 2010, Hegna et al. 2020, Liu et al. 2024 and Sepkoski 2002
Sister taxa: Aristocaris, Coreocaris, Dioxycaris, Discinocarina, Galenocaris, Hoplostraca, Leptostraca, Nebaliella, Nothozoe, Phasganocaris, Protocimex, Pseudodontichthyidae, Saccocaris, Shafferia
Subtaxa: Arenosicaris Baituganocaris Caryocaridina Ceratiocaridina Dictyocaris Dilophaspis Echinocaridina Emmelezoe Guerichicaris Kerfornecaris Lebesconteia Palaeopemphida Pephricaridina Rhinocaridina Rhinocarina Schugurocaris Trigonocarys
Ecology: nektobenthic carnivore