A gregarine, Diplocystis, in the haemocoele of the roach, Blaberus craniifer Burm.
For at last they become an Acinetan or a gregarine, exactly like the parent-cell from which they arose as embryos.
gregarine greg·a·rine (grěg'ə-rīn')n. Any of various sporozoan protozoans of the order Gregarinida that are parasitic within the digestive tracts of various invertebrates. adj. Of or belonging to the order Gregarinida.