†Imperatoria minima Rigby and Potter 1986 (demosponge)
Demospongea - Agelasida - Preperonidellidae
Full reference: J. K. Rigby and A. W. Potter. 1986. Ordovician sphinctozoan sponges from the eastern Klamath Mountains, northern California. The Paleontological Society Memoir 20 1-47
Belongs to Imperatoria according to J. K. Rigby and A. W. Potter 1986
Sister taxa: Imperatoria fistulata, Imperatoria irregularis, Imperatoria marconii, Imperatoria media, Imperatoria mega, Imperatoria voluta
Type specimen: UNSM 395871
Ecology: stationary epifaunal suspension feeder