Suborder Limulina Richter and Richter 1929 (arthropod)
Parent taxon: Xiphosurida according to J. C. Lamsdell 2020
See also Babcock et al. 2000, Bergström 1968, Bergström 1975, Bicknell et al. 2021, Dunlop et al. 2020, Lamsdell 2016 and Størmer 1955
Sister taxa: Belinurina, Bellinurina, Lunataspis, Omoptilus, Omoptilus hispidus, Paleolimuloidea
Subtaxa: Bellinuroopsis Limulacea Limuloidea Paleolimulidae Rolfeiidae
Ecology: nektobenthic carnivore