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Worker. TL 4.9 - 5.3, HL 1.06 - 1.16, HW 0.90 - 0.98, CI 83 - 86, SL 0.84 - 0.94, SI 93 - 97, PW 0.72 - 0.82, AL 1.34 - 1.42 (8 measured).
Mandibles striate, median clypeal carina distinct. Frontal carinae strong, extended back nearly to the occipital margin and only very feebly curved so that they are roughly parallel throughout their length. Antennal scrobe a well-marked groove capable of holding the scape. Pronotal corners rounded in dorsal view. Metanotal groove absent to very weakly marked with the alitrunk in profile. Propodeal spines long and acute, the metapleural lobes low and rounded. Petiole in profile with the anterior and dorsal surfaces confluent through a broad curve or an extremely obtuse angle, the dorsum ascending posteriorly so that the anterior face of the node is distinctly shorter than the posterior. In dorsal view the petiole node much longer than broad. Head and dorsal alitrunk reticulate-rugose, the dorsal surfaces of the pedicel also rugose but here the rugae are longitudinal and are more strongly developed on the petiole than on the postpetiole. Gaster unsculptured. All dorsal surfaces of head and body with dense, long, fine hairs which are erect or suberect, and some of which are very long. Antennal scapes and legs also with abundant long, erect hairs, the longest on the scapes being almost or quite twice as long as the maximum scape width. Colour orange-brown.
Probably the most distinctive species of its group in the Malagasy region, the combination of large size, light colour, extreme hairiness and characteristic node shape makes kelleriHNS immediately recognizable. Its nearest relatives do not appear to be any of the Malagasy species but rather it is closest related to pilosumHNS Emery and yerburyiHNS Forel of the Oriental region.
Found most commonly in these habitats: 41 times found in tropical dry forest, 48 times found in rainforest, 4 times found in littoral rainforest, 2 times found in littoral rainforest edge, 1 times found in beach vegetation on sandy soil, 1 times found in disturbed rainforest, 1 times found in forest litter, 1 times found in forest near fallen tree, 1 times found in litter of shrubs on mangrove edge, 1 times found in montane forest.
Found most commonly in these microhabitats: 39 times ex rotten log, 8 times sifted litter (leaf mold, rotten wood), 18 times ground forager(s), 6 times under rootmat, litter on rock, 4 times ex dead twig above ground, 4 times ex rotten stick on ground, 5 times on low vegetation, 2 times ex dead tree stump, 2 times ex rotting tree stump, 1 times under tree bark, live tree, 1 times under stone, ...
Collected most commonly using these methods: 3 times MW 25 sample transect, 5m, 1 times MW 50 sample transect, 5m, 1 times MW 75 sample transect, 5,10m, 3 times 9 MaxiWinks, mixed samples, 2 times beating low vegetation, 2 times winkler trap, 1 times Malaise trap 4, 1 times pitfall trap, 1 times 10 MaxiWinks, mixed samples, 1 times Ecol. night catch, 1 times live, ...
Elevations: collected from 5 - 1100 meters, 334 meters average