Strumigenys dubitata

Identification
Bolton (2000) - A member of the Strumigenys louisianae-group. As in Strumigenys infidelis the humeral hair in dubitata is stiff and not flagellate. However, dubitata has two pairs of erect short hairs on the vertex, an obtuse and shallow postbuccal groove and a small posterior spongiform lobe ventrally on the petiole. In infidelis only a single pair of standing hairs occurs on the vertex, the postbuccal groove is narrow and deeply incised and the petiole ventrally completely lacks spongiform tissue.

Longino (Ants of Costa Rica) - Apical fork of mandible with two intercalary teeth; a conspicuous preapical tooth just proximal to the apical fork, and a preapical denticle about one third of mandible length from apical fork; outstanding setal pairs on sides of head, humeral angles, and mesonotum all similar, stiff and weakly thickened apically; gaster finely granular, opaque; erect setae on gaster spatulate; posterior face of petiolar node quadrate in posterior view, with produced anterolateral corners.

Distribution based on Regional Taxon Lists
Neotropical Region: Costa Rica.

Nomenclature

 *  dubitata. Strumigenys dubitata Bolton, 2000: 523, figs. 312, 341, 353 (w.) COSTA RICA.

Worker
Holotype. TL 2.5, HL 0.60, HW 0.52, CI 87, ML 0.34, MI 57, SL 0.38, SI 73, PW 0.31, AL 0.62. Mandible with a minute inconspicuous denticle proximal to the preapical tooth, located on the upper inner margin just distal of its midlength. With head in profile postbuccal groove shallow and obtuse. Apicoscrobal hair short and stiff, weakly remiform. Cephalic dorsum with two pairs of short standing hairs, one close to occipital margin, the other close to highest point of vertex. Pronotal humeral hair stiff and more or less straight, simple to very narrowly remiform; mesonotal standing hairs simple to narrowly remiform. Ventral surface of petiole with a small spongiform lobe posteriorly below the node; when postpetiole flexed downward this lobe is concealed between the ventral lobes of the postpetiole.

Paratypes. TL 2.4-2.6, HL 0.57-0.64, HW 0.46-0.54, CI 81-87, ML 0.32-0.36, MI 54-57, SL 0.35-0.41, SI 72-78, PW 0.29-0.32, AL 0.57-0.66 (7 measured). As holotype but preapical denticle may be difficult to see.

Type Material
Holotype worker, Costa Rica: Provo Guanacaste, Guanacaste N. P., Santa Rosa Sector, iv.1985 (J. Memmott).

Paratypes. Costa Rica: 2 workers with same data as holotype; 1 worker, Provo Guanacaste, Santa Rosa N. P., 10°51'N, 85°37 'W, 300 m., 11-15.vii.1985, dry forest, #519-S (J. Longino); 2 workers with same data but 12.vii.1985, #420-S (J. Longino); 3 workers, Provo Guanacaste, La Pacifica, 40 m., 10°27' N, 85°08'W, 16-17.vii.1985, dry forest litter sample, #530-S (J. Longino) (BMNH,, , , ).