Carebara diversa tenuirugosa

Identification
Wheeler (1929) - The posterior sculpture of the head is very peculiar and quite different from that of the other subspecies of diversus.

Distribution based on Regional Taxon Lists
Indo-Australian Region: Philippines.

Nomenclature

 *  tenuirugosa. Pheidologeton diversus subsp. tenuirugosus Wheeler, W.M. 1929g: 44 (s.w.) PHILIPPINES. Combination in Carebara: Fischer, Azorsa & Fisher, 2014: 71.

Worker
Major Length 8-9 mm.

Head distinctly broader than long; anterior clypeal border sinuate in the middle. Scutellum very prominent; epinotal spines deflected at their tips. Petiolar node with transverse, superior border, entire in the smaller specimen, feebly emarginate in the middle in the larger specimen. Sides of postpetiole produced as blunt conules.

Shining; anterior rugae on head not very pronounced and not continued back beyond the eyes; vertex and sides of front smooth and shining over a broad area, sparsely punctate behind. Rugae on the vertex fine, not transverse, slightly diverging in front, longitudinal behind, interspersed with .coarse elongate punctures or foveolae. The occipital rugae are much finer than those on the sides of the front: sides of head with fine, straight, longitudinal rugae. Pronotum, base and declivity of epinotum sharply transversely rugose; mesonotum, posterior and lateral portions of pronotum sparsely and coarsely punctate; scutellum smooth and impunctate; sides of thorax very finely punctate or granular; with longitudinal rugae ventrally and posteriorly. Petiole and postpetiole rather smooth in front; longitudinally rugose behind on the sides. Gaster shining and finely punctate; base of first segment also with scattered larger punctures.

Hairs yellow, sparse on the tibiae.

Dark reddish brown; antennae and legs paler; gastric segments with yellowish borders; mandibles and clypeus bordered with black.

Minima Length about 1.8 mm.

Smaller than the worker of the typical diversus, which measures 2.5 mm., with the mesoepinotal constriction distinctly longer and more rounded at the bottom and the epinotal spines shorter and more slender. The color is paler, the thorax and appendages being brownish yellow; the head dark brown above, the scapes and gaster paler brown. The few hairs on the body are shorter than in typical diversus, the subappressed hairs on the legs much the same.

Type Material
Two large and two minima workers taken by Professor Silvestri at Los Banos, Luzon Island, Philippines. The largest specimen is almost a maxima, or soldier, but possesses no ocellus.