cellular slime mould
... that individual cellular slime mould cells are of two distinct mating types?
... that individual <b id="mwBtY"><a href="./Polysphondylium_pallidum" id="mwBtc" rel="mw:WikiLink" title="Polysphondylium pallidum">cellular slime mould</a></b> cells are of two distinct mating types?