in the medulla terminalis ganglionic x-organ ( mtgx ) of the eyestalk of the freshwater prawn , palaemon paucidens , six peptidergic neurosecretory cell types ( a- , b- , c- , d- , e- , and f-cells ) are distinguishable on the basis of the different morphology of their elementary granules and rough endoplasmic reticulum ( rer ) .
C0007634
cells
C0230779
rough endoplasmic