†unranked clade Hymenostraca Rolfe 1969 (arthropod)
Parent taxon: Pancrustacea according to T. A. Hegna et al. 2020
See also Bengtson 1992 and Sepkoski 2002
Sister taxa: Altocrustacea, Bredocaris, Crustacea, Skara, Wujicaris, Yicaris
Subtaxa: Branchiocaris Ercaicunia Hymenocarididae Hymenocaris Multicrustacea Nereocaris Oligostraca Tokummia
Ecology: