Illustrated diagnostic character matrix based on micro-CT images used for species delimitations (Z. obamai = left column, Z. sarowiwai = middle column, Z. wilsoni = right column). A, B, C Cephalic capsule in profile (virtually dissected) D, E, F Clypeus and torulo-posttorular complex in anterior view G, H, I Anterior head (antennae virtually removed) showing parafrontal ridges (orange) and torulo-posttorular complex (green) J, K, L Antennal scape in dorsal view (virtually dissected) M, N, O Head in posterodorsal view showing vertexal margin (orange), posterior face, and occipital margin (green) P, Q, R Head in posterior view showing occiput and occipital foramen (virtually dissected) (ventral head facing upwards).