Orthognathotermes

Rocha, Mauricio Martins Da & Cancello, Eliana M., 2009, Revision of the Neotropical termite genus Orthognathotermes Holmgren (Isoptera: Termitidae: Termitinae), Zootaxa 2280, pp. 1-26 : 5

Orthognathotermes soldier key

1. In dorsal view, inner distal margin of the right mandible smoothly curving inward, in a continuous (fig. 1, 6), in lateral view (fig. 33, 34) shows a slightly down curvature; dorsal lump salient, in profile (fig. 1-6)................. 2

- In dorsal view, inner distal margin of right mandible not continuous, but twisted inward and downward (figs. 7–15), in lateral view (fig. 35, 36) internal margin, almost straight, the tip abruptly downward curving; dorsal lump slightly salient, in profile (fig. 7–15) ......................................................................................................... 7

2. Ocelar spots present as a slight elevation in the dorsal surface of the head (fig. 3, arrow) ............... O. wheeleri

- Ocellar spots absent (figs. 1, 2, 4–6)....................................................................................................................3

3. Labrum single lobed, head capsule with only scattered bristles (fig. 5) ................................. O. mirim sp. nov.

- Labrum with middle lobe distinct........................................................................................................................4

4. Head capsule covered with a continuous mat of short hairs (fig. 6) ........................................ O. pilosus sp. nov

- Head with scattered bristles and/or short hairs.................................................................................................... 5

5. Flanges with a light constriction on the base (fig. 4) ...................................................... O. tubesauassu sp. nov.

- Flanges without a constricted base (figs. 1, 2); known only from Amazonian forest (fig. 30, stars and filled squares)..............................................................................................................................................................................6

6. Head capsule length always larger than 2.90 mm (fig. 1) ................................................................... O. humilis

- Head capsule length always shorter than 2.80 mm (fig. 2) ............................................................... O. aduncus

7. Head capsule full covered with a mat of short hairs, without bristles (fig. 10) ............................ O. gibberorum

- Head capsule without a mat of short hairs on entire surface (figs. 7–9, 11–15)..................................................8

8. Tip of the left mandible strongly hooked, curved backward; tip of the right mandible twisted forming a 90º angle with proximal portion of mandible (fig. 11) ................................................. O. uncimandibularis sp. nov.

- Tip of the left mandible lightly curved, not backward as above; tip of the right mandible twisted, always form- ing a larger than angle 90º (fig. 7–9, 12–15).......................................................................................................9

9. Head with parallel and straight sides (figs. 12, 13, 15)......................................................................................10

- Head with parallel sides, irregular sides (fig. 14) or slightly convergent in front, always somewhat convex (figs. 7–9)..........................................................................................................................................................12

10. Width of head about 70 % of head length or more ................................................................... O. macrocephalus

- Width of head lesser than 70 % of head length.................................................................................................. 11

11. Length of head capsule shorter than 3.2 mm; ventral surface of head capsule densely covered of short hairs and some bristles (fig. 13)............................................................................................................. O. okeyma sp. nov.

- Length of head capsule larger than 3.2 mm; ventral surface of head capsule with scattered bristles and without short hairs (fig. 12) ..................................................................................................................... O. orthognathus

12. Mandible length shorter than head capsule (near 80% of its length); head capsule length longer than 3.28 mm (figs. 7, 8) .......................................................................................................................................................... 13

- Mandible length almost equal to the head capsule; head capsule length shorter than 3.00 mm (figs. 9, 14) .. 14

13. Head with parallel and convex sides (fig. 8) ......................................................................................... O. heberi

- Head with sides slightly converging in front (fig. 7) .......................................................................... O. insignis

14. Head with irregular sides (fig. 14) .................................................................................. O. longilamina sp. nov.

- Head with regular and convex sides (fig. 9) .................................................................................. O. brevipilosus