Fig. 20. A in Species groups in the genus Cubitermes (Isoptera: Termitidae) defined on the basis of enteric valve morphology

Fig. 20. A. Enteric valve of the "sulcifrons valve pattern", from a worker of Cubitermes sulcifrons Wasmann, 1911: note the spearhead-shape of the secondary cushions; B. Idem from a soldier of C. sulcifrons; C. Idem from an imago of C. umbratus Williams, 1954, spatulae are sketched on each PC; A, B and C at the same scale; D. Geographical distribution of species with the sulcifrons valve pattern.