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 Posterior head in ventral view showing ventral occipital margin (virtually dissected) D, E, F Head in ventral view showing mouthparts and hypostoma (virtually dissected). G, H, I Mesosoma in profile (orange) with pleural endophragmal pit (green) J, K, L Mesosoma in dorsal view M, N, O Petiole in profile showing petiolar tergum (green) and petiolar sternum (orange) with subpetiolar process P, Q, R Petiole in dorsal view.