Suborder Monokonophora Lang 1956 (arthropod)
Parent taxon: Tanaidacea according to F. R. Schram 1979
See also Schram 1974
Sister taxa: Anthracocaridomorpha, Apseudomorpha, Dikonophora, Ophthalmapseudidae, Tanaidomorpha
Subtaxa: Eucryptocaris
Ecology: epifaunal omnivore
Distribution: found only at Area 3, Pit 11, Peabody Coal Company (Carboniferous of Illinois)