Key to species of Angularitermes

1. Frontal tube very conical with a wide base, almost half of the length of frontal tube (Fig. 2 A)................................................................................................. A. coninasus Carrijo & Rocha, n. sp.

- Frontal tube longer, not as conical as above, width of base much shorter than half of the length of frontal tube (Figs. 2 B–F)..................................................................................................... 2

2. Short hairs on frontal tube, when present, only in the first basal third............................................ 3

- Short hairs along the length of frontal tube.................................................................. 4

3. Postclypeus very large and projected forward; length of frontal tube proportionally longer compared to cephalic capsule size (Fig. 2 E)................................................................. A. pinocchio Cancello & Brandão

- Postclypeus smaller; length of frontal tube proportionally shorter compared to cephalic capsule size (Fig. 2 C).................................................................................................. A. orestes (Araujo)

4. Antennae with 14 articles; ratio LN/WH more than 1.85 (Figs. 2 B and 2F)........................................ 5

- Antennae with 15 articles; ratio LN/WH less than 1.55; (Figs. 2 D)...................... A. tiguassu Cancello & Brandão

5. Postclypeus very prominent and upward oriented (Fig. 2 F).................................... A. clypeatus Mathews

- Postclypeus short (Fig. 2 B).......................................................... A. nasutissimus Emerson