Genus Angulitermes · 角白蚁属

Morphology

The descriptions below are an adaptation of the original genus-level accounts; terms follow the meaning of the source, and the original is not transcribed verbatim.

Diagnostic characters

A large genus of the Oriental region. Soldier small, slender and pale; the anterior margin of the labrum incurved, its anterolateral corners produced into horn-like processes; mandibles slender and rod-like, incurved apically and slightly of the snapping type, as long as or longer than the head; postmentum short and club-shaped; pronotum strongly saddle-shaped; tibial spur formula 3:2:2, the dorsal spurs of the fore tibia extremely small. Worker antennae 14-segmented; alate antennae 15-segmented, the wing membrane bearing stellate and non-stellate microtrichia.

Alate

Small, brown, densely covered with short and long setae; head nearly circular; frontal plate minute to elongate and slit-like; compound eyes round, medium-sized; ocelli elliptical, far removed from the compound eyes; antennae 15-segmented; postclypeus arched, about half as long as wide; apical tooth of the mandibles larger than the first marginal tooth; posterior margin of the first marginal tooth of the left mandible only slightly longer than its anterior margin, the second marginal tooth separated by a notch; anterior and posterior margins of the first marginal tooth of the right mandible subequal in length, the posterior margin of the second marginal tooth incurved; pronotum semicircular or nearly trapezoidal, slightly narrower than the head width including the eyes; tibial spur formula of the fore tibia 3:2:2; wings pale brown, the membranous surface hairy, the anterior and posterior margins with papillae, the membrane with stellate and non-stellate microtrichia; costa thick, running along the anterior margin; radius as thick as the costa, parallel and closely adjacent to it; media weak, with few branches, arising independently in the forewing and from the radius in the hindwing; cubitus with 10–12 branches.

Soldier

Small, slender and pale, sparsely to rather densely hairy; head nearly rectangular, with frontal tubercles; fontanelle situated beneath the frontal tubercles; antennae 14-segmented; anterior margin of the labrum incurved, the anterolateral corners produced into horn-like processes; mandibles slender and rod-like, incurved apically and slightly of the snapping type, as long as or longer than the head; postmentum short and club-shaped; pronotum strongly saddle-shaped; tibial spur formula 3:2:2, the dorsal spurs minute and sometimes indistinct.

Worker

Small, slender and pale, rather densely hairy; head nearly circular; frontal plate indistinct, with a circular translucent spot; antennae 14-segmented; postclypeus strongly arched, about half as long as wide or slightly more than half; mandibles as in the alate, the posterior margin of the second marginal tooth of the right mandible more strongly incurved; pronotum strongly saddle-shaped, the anterior marginal notch weak or absent; tibial spur formula 3:2:2, the dorsal spurs of the fore tibia extremely small, sometimes almost invisible.

Sources: Chhotani, O. B. 1997. The Fauna of India and the Adjacent Countries: Isoptera (Termites), Volume II (Family Termitidae). Calcutta: Zoological Survey of India, xx+801 pp., pp. 224–225 This text is an adaptation, not a verbatim transcription of the original.