heterocyemida

from The Century Dictionary.

• An order of Rhombozoa in which the ectoderm of the adult is not ciliated and there is no polar cap, but at the anterior end the ectoderm cells contain refringent bodies and may give rise to four terminal wart-like papillæ. It contains the genera Conocyema and Microcyema, both parasitic in the renal sacs of cephalopods.