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Worker. TL 3.4 - 4.1, HL 0.80 - 0.94, HW 0.74 - 0.88, CI 92 - 95, SL 0.56 - 0.72, SI 74 - 84, PW 0.54 - 0.66, AL 0.88 - 1.08 (30 measured).
Mandibles finely longitudinally striate. Antennal scrobes represented by an impressed area bounded above by the frontal carinae but without a differentiated ventral margin. Alitrunk in profile with the propodeum sloping downwards strongly from the metanotal groove to the base of the stout, acute spines. Metapleural lobes acutely triangular and generally slightly upcurved. Both petiole and postpetiole strongly anteroposteriorly compressed, in profile narrow and much higher than the dorsum is long, in dorsal view markedly transverse, much broader than long, in general form similar to that of bessoniHNS, Fig. 9. Head strongly longitudinally rugulose, often with cross-meshes and always with the spaces between the rugulae reticulate-punctate. Dorsal alitrunk unsculptured or at most with some weak punctulation on the pro- or mesonotum. Pedicel segments and gaster unsculptured. Head with sparse, fine, erect hairs. Alitrunk and pedicel usually without hairs but rarely with 2 - 6 hairs present on the former. First gastral tergite always without hairs, but remaining tergites with them. Colour varying from light to dark brown, the gaster sometimes darker in shade than the alitrunk.
T. humblotiHNS is an African species which has extended its range to include the Comoro Islands, but has not yet been discovered on the mainland of Madagascar. In Madagascar is a sibling of humblotiHNS, T. bessoniHNS, which has the head consistently less strongly sculptured and also tends to be more densely hairy than humblotiHNS. Details for their separation are noted in the key.
As noted above, humblotiHNS really belongs to the Ethiopian region fauna, and the description is based mainly upon such material. Discussion of the synonymy and distribution of humblotiHNS is not given here as it will be dealt with in the part of this study dealing with the Ethiopian region.
Found most commonly in these habitats: 3 times found in riparian forest, 9 times found in coastal scrub, 5 times found in tropical dry forest, 7 times found in rainforest, 10 times found in open secondary vegetation, 2 times found in coastal thicket, 3 times found in in forest, 5 times found in low rainforest, 3 times found in across sandy trail in dwarf litoral forest, 2 times found in miombo woodland, ...
Found most commonly in these microhabitats: 14 times ex rotten log, 13 times ground forager(s), 1 times sifted litter, 13 times ex soil, 6 times ground nest, 3 times under rotten log, 4 times on low vegetation, 1 times yellow pan trap, 3 times under stone, 2 times on ground at AH06, 1 times under log, ...
Collected most commonly using these methods: 11 times Malaise trap, 2 times yellow pan trap, YP 25 trap transect, 1 times Malaise trap, 4 Malaise, 2 times Pitfall trap, 2 times 04 IAA 024B, 1 times hand netted, 1 times Human dung trap, 1 times winkler trap, 1 times Beat 25 sample transect, 10m, beating low vegetation, 1 times Davis sifter.
Elevations: collected from 1 - 1700 meters, 202 meters average
Type specimens: syntype of Tetramorium humbloti: casent0101295, casent0101296, casent0101737; syntype of Tetramorium humbloti pembensis: casent0909182; syntype of Tetramorium humblotii victoriensis: casent0901157, casent0909183