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- Aenictus glabrinotum Jaitrong, Weeyawat, 2011, Zootaxa 3128: 16-16.
Measurements.Holotype and paratype workers (n = 6): TL 3.10–4.05 mm; HL 0.75–0.90 mm; HW 0.62–0.83 mm; SL 0.43–0.70 mm; ML 1.00– 1.37 mm; PL 0.28–0.33 mm; CI 83–94; SI 68–85. Description of worker (holotype and paratypes). Head in full-face view slightly longer than broad, with sides slightly convex and posterior margin concave; occipital carina complete, not interrupted medially. Antennal scape relatively short, extending slightly beyond midlength of head; antennal segments II–X each longer than broad; II almost as long as each of III–VI. Frontal carina very short, not extending beyond the level of posterior margin of torulus. Parafrontal ridge absent. Anterior margin of clypeus lacking denticles; median portion of clypeal margin almost straight or feebly concave. Masticatory margin of mandible with a large apical tooth followed by a small subapical tooth and 3–4 denticles, which are only slightly smaller than subapical teeth; basal margin bearing 3–4 denticles. Promesonotum in profile weakly convex dorsally and sloping to metanotal groove. Propodeum in profile with almost striagth or feebly convex dorsal outline; propodeal junction rounded; declivity of propodeum shallowly concave, and encircled with a thin rim; area below propodeal spiracle distinctly impressed; opening of propodeal spiracle clearly circular with its diameter about 1.6 times as long as diameter of postpetiolar spiracle. Petiole clearly longer than high, with its dorsal outline convex; subpetiolar process relatively low, with its ventral outline straight or weakly convex, and anteroventral corner bluntly produced or roundly angled. Postpetiole almost as long as petiole and clearly longer than high. Head entirely smooth and shiny; mandible extensively smooth, without fine striation; antennal scape dorsally smooth and ventrally superficially sculptured. Pronotum smooth and shiny except the anterior portion punctate; mesonotum smooth and shiny; mesopleuron finely and densely punctate; metapleuron and lateral face of propodeum with fine rugulae and very minute sculpture but partly smooth; dorsum of propodeum smooth and shiny. Petiole with dorsal surface smooth and shiny, and anterior and lateral faces finely punctate. Postpetiole entirely smooth and shiny. Legs smooth and shiny. Head with one or two long hairs on vertex (often completely hairless); ventral surface of head also with few (often no) standing hairs. Dorsum of mesosoma usually without standing hairs. Petiole and postpetiole each with only a pair of standing hairs. Hairs on hind femur very short, never overlapping each other; mid and hind tibiae with short appressed hairs only. Entire body dark reddish-brown, with a relatively large typhlatta spot on occipital corner; anterior border of the spot diluted into ground color.
Etymology. The specific name is a noun meaning the (promeso)notum without standing hairs.
Distribution. Borneo (Sabah, Sarawak, and E. Kalimantan) (Fig. 25).
Remarks.A. glabrinotum is a distinct species of the species group in having very few standing hairs on the head and promesonotum.
- Jaitrong, Weeyawat; Yamane, Seiki; 2011: Synopsis of Aenictus species groups and revision of the A. curra x and A. laeviceps groups in the eastern Oriental, Indo-Australian, and Australasian regions (Hymenoptera: Formicidae: Aenictinae), Zootaxa 3128: 16-16. doi