Apagotermes stolidus Sands, 1972 愚蠢疲白蚁

Morphology

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

Diagnostic characters

Small body size distinguishes it from many genera, including Amicotermes, whose worker enteric valve surface is similar. The alate resembles Astratotermes obstructus, but the latter has a slightly longer postclypeus, broader meso- and metanotal plates and an ocellus closer to the compound eye.

Worker

Very small, W 0.58 mm. Fore tibia moderately inflated, Ti/Tw 3.84, with 3 apical spurs, the third about half the length of the other two. Mandibular apical tooth short, La/Li 0.52, Ra/Ri 0.67; the proximal end of the left accessory marginal tooth level with the margin of the molar prominence; the apex of right marginal tooth 1 distinctly behind the line joining the apical tooth and marginal tooth 2, its anterior margin shorter than that of marginal tooth 2. Midgut and hindgut nearly transverse, located to the right of the Malpighian knot. Enteric valve seat weakly trilobed, the two outer lobes tending to be opposed but not longer than the third lobe, joined by a distinct, very short neck to the second hindgut pouch, dorsal in the unopened abdomen; the enteric valve inner pads protrude equally through the valve opening, each with regularly arranged long spines on the posterior 1/3, the spines below the outermost row slightly spatulate or sword-shaped, positions 1 and 3 (alternating) with slightly fewer spines, the remaining surface with small spines or spinules.

Alate

Small, W 0.74 mm. Fore tibia with 3 apical spurs, the third almost as large as the other two. Mandibular apical tooth short, La/Li 0.55, Ra/Ri 0.67–0.71; the proximal end of the left accessory marginal tooth just free of the molar prominence; right mandibular apical tooth and marginal tooth apices almost in line, marginal tooth 1 with the anterior margin shorter than that of marginal tooth 2, the latter curved. Meso- and metanotal plates narrow at the constriction, M/W 0.21, transverse suture present, weak on the mesonotum. Ocellus close to the compound eye.

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.