part of basal region of the standing slug posterior region of the migratory slug basal region of the early culminant basal disc of the mid culminant outer basal disc of the late culminant lower cup of the fruiting body outer basal disc of the fruiting body anterior like cell rearguard cell Cell expressing ecmB but not ecmA. Rearguard cells are located at the very rear of the slug (rearguard region). These cells form the outer basal disc of the fruiting body. If a migratory slug is formed, these cells are left behind. DDANAT:0000409 Dictyostelium_discoideum_anatomy prestalk B cell pstB cell