Xenocarida (from theGreek forstrange shrimp) is a proposedclade inside thesubphylumCrustacea that comprises two classes that were discovered in the 20th century:Remipedia andCephalocarida. Both groups are marine hermaphrodites.[1][2] The clade was recovered as the sister groups toHexapoda (includinginsects).[3]
However, other studies do not recover Xenocarida as a monophyletic group[4][5] and variously findBranchiopoda orRemipedia as the hexapod sister group[6][7][4][5]
^Jerome C. Regier; Jeffrey W. Shultz; Andreas Zwick; April Hussey; Bernard Ball; Regina Wetzer; Joel W. Martin & Clifford W. Cunningham (2010). "Arthropod relationships revealed by phylogenomic analysis of nuclear protein-coding sequences".Nature.463 (7284):1079–1083.Bibcode:2010Natur.463.1079R.doi:10.1038/nature08742.PMID20147900.S2CID4427443.