Gregarina cuneata trophozoite from the mealworm, Tenebrio molitor. This gregarine lives in the gut where it attaches to the gut wall.  It consists of a rather large cell composed of three parts, an epimerite, protomerite and deutomerite.  The epimerite embeds itself in a mucosal cell.  This is a transverse section revealing the epicytic folds of the deutomerite.  Though the projections appear to be tubular, they are actually long folds, that give the organism a corrugated topographical appearance.  The surface of the folds has a pentalaminar layering.  Myonemes (MY) can be seen as granules though they are actually long, slender rods.  Though the organism is often thought of as non-motile, it can undergo slow, rhythmic undulations of the surface.  Paraglycogen (PA) can be seen, as well as polyribosomes (PR) and free ribosomes (R).  The basal lamina can also been seen (BL).  70,000x