Camponotus callistus bradleyi

Nothing is known about the biology of .

Identification
This beautiful specimen agrees very closely with Emery's description of the typical Camponotus callistus, of which he had major, minor and female specimens from Mapiri, Bolivia, but the Peruvian specimen is decidedly smaller (the minor of callistus measures 4.5 mm.) and seems to have a differently shaped petiole. (Wheeler 1934)

Distribution based on Regional Taxon Lists
Neotropical Region: Ecuador, Peru.

Nomenclature

 * . Camponotus (Myrmocladoecus) callistus subsp. bradleyi Wheeler, W.M. 1934g: 234 (w.) PERU.
 * Subspecies of callistus: Kempf, 1972a: 55; Bolton, 1995b: 89; Bezděčková, et al. 2015: 111.

Worker
minor Length about 3.5 mm.

Head subtrapezoidal, without the mandibles broader than long, with broad, nearly straight posterior border, rather sharp posterior corners and anteriorly converging sides, which are sinuate at the level of the eyes and distinctly convex in front. In profile the head is most convex in the middle of the front, with the vertex distinctly, transversely flattened and bordered on each side with a sharp carina from the eye to the occipital border. Eyes rather large, convex, placed distinctly behind the middle of the head. Mandibles with convex external borders, 6-toothed, the three basal teeth short. Clypeus large, convex in the middle, narrow and depressed laterally, its median anterior border broadly rounded and entire. Frontal area large, trapezoidal, twice as broad as long; frontal carina: not closely approximated, straight and subparallel anteriorly, arcuate and diverging behind; frontal groove short and tenuous. Antenna: long and stout; scapes reaching about two-fifths of their length beyond the posterior border of the head. Thorax narrower than the head, very broad through the pronotum; promesonotal suture impressed; mesoepinotal impression very deep, wide at the sides, where the large, projecting metanotal spiracles are situated. Pronotum somewhat less than twice as broad as long, flattened above, semicircularly rounded in front, sides straight and subparallel in the middle, converging behind, the anterior and lateral borders marginate; mesonotum sloping, about one and one-half times as broad as long, broader in front, semicircularly rounded behind, the sides marginate, as are also those of the epinotum, the base of which is somewhat longer than broad, anteriorly subtriangular, sloping upward and backward, posteriorly more parallel-sided, except for a short, blunt projection on each side; posterior border arcuately excised and bearing at each corner a horn-like spine, which is stout and flattened at the base and turned somewhat outward and upward, produced apically as a somewhat shorter, more slender, blunt and terete extension, which is turned inward and upward. Declivity of epinotum concave, perpendicular, scarcely more than half as long as the base; sides of pronotum concave, meso- and metapleurae flattened. Petiole large and thick, shaped like that of C. sanctae-fidei, in profile with the anterior and posterior surfaces straight and perpendicular, the dorsal surface very feebly concave, sloping upward to the superior border, which, seen from behind is acute, arcuately rounded, indistinctly crenulate, bilobulate in the middle above and on each side below produced as a straight, blunt, spine, which is nearly twice as long as broad at its base. From above the petiole is broader than the epinotum, subtrapezoidal, with straight anterior and posterior borders and concave, anteriorly converging sides. Gaster small, rounded-sub quadrate, nearly as broad as long. Legs very long and stout.

Mandibles, head, sides of pronotum, apical portion of epinotal spines, ventral portion of epinotal declivity, gaster and legs very smooth and shining, with fine, sparse, piligerous punctures. Dorsal surface of thorax, meso- and metapleurae and petiole opaque, coarsely, evenly and closely punctate, the punctures becoming finer at the anterior end of the pronotum.

Hairs moderately abundant, pale yellow, erect, very fine and long, even on the tips of the epinotal spines, shorter on the scapes and legs; pubescence undeveloped, except on the funiculi.

Mandibular teeth, thorax and petiole black; head, sides and anterior border of pronotum, apical portion of epinotal spines, superior border of petiole, gaster, antennae and legs, including the coxae, bright yellowish red; knees somewhat brownish.

Type Material
A single specimen taken by Dr. J. C. Bradley at El Campamiento, Perene, Peru.