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HOLOTYPE WORKER. TL 2.1, HL 0.48, HW 0.44, CI 91, ML 0.14, MI 29, SL 0.25, SI 58, PW 0.28, AL 0.51. With the above characters and the following. Dorsal surfaces of head, alitrunk, waist segments and gaster blanketed with spatulate to spoon-shaped groundpilosity; similar hairs fringe upper scrobe margin and leading edge of scape. Apicoscrobal and pronotal humeral hairs absent. Standing hairs absent from first gastral tergite. Cephalic dorsum, dorsum and sides of alitrunk and petiole reticulate-punctate. Promesonotum slightly convex dorsally and posteriorly bluntly dorsolaterally marginate; propodeal dorsum sloping posteriorly to the declivity. Propodeum without differentiated teeth, the propodeal lamella continuous down declivity. Peduncle of petiole in profile with a broad translucent ventral keel; spongiform tissue limited to a narrow strip along ventral margin of keel. In profile, ventral spongiform lobe of postpetiole forms a hollow triangle. First gastral tergite with basigastral costulae oblique and radiating medially on each side of a central clear area. Margin of basal truncated area of first gastral sternite with row of short, scale-like hairs.
PARATYPE WORKERS. TL 1.9 - 2.1, HL 0.46 - 0.49, HW 0.41 - 0.44, CI 86 - 94, ML 0.14 - 0.16, MI 29 - 35, SL 0.24 - 0.27, SI 56 - 64, PW 0.27 - 0.28, AL 0.49 - 0.56 (11 measured). As holotype.
Holotype worker, Madagascar: grassland near Foret Ankazomivady, 28 km. SSW Ambositra, 1670 m., 20 Ã‚Â° 46 ' 30 " S, 47 Ã‚Â° 10 ' 6 " E, 12.1.1998, grassland, nest in soil in 2 adjoining cells, 9.5 cm. from surface, found by digging, SAM # 011222 (H. G. Robertson) (SAM). Paratypes. 20 workers and 5 queens (4 alate and 1 dealate) with same data as holotype (BMNH, MCZ).
The enormously expanded keel on the petiole and the characteristic mandibular dentition make adsitaHNS one of the most easily recognized Malagasy species. These characters, coupled with the presence of spoon-shaped hairs on all dorsal surfaces and the hollow-triangular ventral spongiform lobe of the postpetiole, immediately isolate adsitaHNS from all other species.
Found most commonly in these habitats: 3 times found in rainforest, 1 times found in Grassland, nest in soil in 2 adjoining cells, 9.5 cm from surface, 1 times found in grassland
Collected most commonly using these methods or in the following microhabitats: 2 times 10 MaxiWinks, mixed samples, 1 times by digging, 1 times 5 MaxiWinks, mixed samples, 1 times found by digging
Elevations: collected from 225 - 1670 meters, 637 meters average