Macrosubulitermes greavesi Hill, 1942 格里夫斯大锥白蚁

Morphology

The description below is paraphrased from the original or a later revision, by caste; the source is cited at the end.

Diagnostic characters

The left mandibular index of the alate is 1.07 (1.29–1.33 in Subulitermes microsoma); the soldier head is larger than in S. microsoma and broader and more globular posteriorly, the head length/head width ratio 1.49–1.71 (2.27 in S. microsoma).

Alate

The apical antennal segment is pale and the basal segments dark; the dark part of the pronotum is the same colour as the head (the pronotum of S. microsoma is paler); the tibiae and the ends of the femora are darker than the middle of the femora; the wings are darker than in S. microsoma (the punctures are denser); the sternites have dark patches at the sides and a pale middle; the vertex is gently raised between the ocelli; the profile of the head is strongly arched, with the highest point above the ocelli; the fontanelle is a pale narrow slit, forked at its front end and shorter than the ocelli; there are 15 antennal segments, segment 3 slightly longer than segments 2 and 4 and more globular at its end; the length of the postclypeus is less than half its width (0.20–0.22 × 0.47 mm); the left mandibular index is 1.07; the lateral margins of the pronotum converge posteriorly; tibial spur formula 2:2:2.

Soldier

There are 8 setae on the base of the nasus and the vertex; the frontal projection and the head bear sparse short hairs; the hairs of the abdominal tergites are relatively dense and only slightly shorter than the marginal setae; the head is larger than in S. microsoma and broader and more globular posteriorly; the head length/head width ratio is 1.49–1.63 (perlevis) or 1.71 (greavesi); the head is very slightly constricted, with lateral swellings behind the base of the nasus; the frontal projection is nearly cylindrical; there are 12 antennal segments (perlevis), segments 2, 3 and 4 nearly equal in length; the mandibles have no apical point; the fore tibia is nearly as wide as the femur and slightly swollen; the abdomen is thick, broad and rounded.

This genus is monotypic, containing only this species; the following is the genus-level description based on the original literature; species-level measurements and intraspecific variation are given in the original.