Variation of relevant morphometric measurements for the distinction of castes and species; a Metafemur length (FeL) in relation to head width (HW) for minor workers of C. explodens sp. n., as well as minor workers of C. badia and C. saundersi (type specimens plotted separately) b Scape length (SL) in relation to head width (HW) for minor workers, major workers, gynes and males of C. explodens sp. n., as well as male of C. badia.