Strumigenys arges

Identification
Bolton (2000) – A member of the Strumigenys sauteri-group. For relationship and separation of this species see under Strumigenys sauteri.

Distribution based on Regional Taxon Lists
Oriental Region: Thailand.

Nomenclature

 *  arges. Pyramica arges Bolton, 2000: 462 (w.q.) THAILAND. Combination in Strumigenys: Baroni Urbani & De Andrade, 2007: 115

Worker
Holotype. TL 2.3, HL 0.66, HW 0.49, CI 74, ML 0.04, MI 6, SL 0.27, SI 55, PW 0.30, AL 0.64. Anterior clypeal margin evenly deeply concave between distinctly projecting narrowly rounded anterolateral clypeal angles. Lateral margins of clypeus convex in full-face view, especially anteriorly where the sides converge toward the anterolateral angles. Dentition as described above. Leading edge of scape evenly shallowly convex in the basal half, without a prominent angular extension of the margin. Dorsum of head finely reticulate-punctate. Eye with 4 ommatidia in the longest row. Standing hairs extremely sparse: absent from dorsal head, alitrunk and petiole; one pair present posteriorly on propodeal disc, one pair at extreme base of first gastral tergite, present around gastral apex. Leading edges of scapes and entirety of legs lacking prominent hairs of any form. Dorsal alitrunk and propodeal declivity between the teeth finely and densely punctulate. Petiole node and disc of postpetiole smooth and shining. First gastral tergite smooth, with extremely short basigastral costulae that scarcely extend beyond the posterior limit of the limbus. Mesopleuron and most of metapleuron smooth and shining. Propodeum armed with a pair of triangular teeth that are broad basally and subtended by a carina rather than a lamella. Lateral spongiform lobe of petiole large in profile but not extending as far forward as the level of the anterior face of the node. Petiole node in dorsal view fractionally broader than long (discounting the posterior collar). Disc of postpetiole transversely subovate, margined by spongiform tissue.

Paratypes. TL 2.1-2.2, HL 0.64-0.68, HW 0.46-0.50, CI 72-74, ML 0.04-0.06, MI 6-9, SL 0.26-0.28, SI 53-57, PW 0.26-0.28, AL 0.58-0.62 (4 measured). As holotype but petiole in dorsal view as long as broad in some paratypes.

Type Material
Holotype worker, Thailand: Doi Suthep, 5.xi.1985, no. 11 (Lobl & Burckhardt).

Paratypes. Thailand: 3 workers and 1 queen (dealate) with same data as holotype; 2 workers, Doi Suthep, 4.xi.1985, no. 7 (Lobl & Burckhardt) (MHN,, ).