Leptogenys tiobil

Distribution
This taxon is known from northcentral Venezuela.

Nomenclature

 *  tiobil. Leptogenys tiobil Lattke, 2011: 177, fig. 32 (w.) VENEZUELA.

Worker
Metrics, holotype (paratypes, n = 5): HL 2.05 (2.05 – 2.15); HW 1.4 (1.45 – 1.5); ML 1.05 (1.05 – 1.15); EL 0.5 (0.5 – 0.55); SL 2.6 (2.45 – 2.6); PW 1 (1.2 – 1.45); WL 3.55 (3.4 – 3.65); PH 1.1 (1.05 – 1.1); PL 1.5 (1.45 –1.55); DPW 0.65 (0.6 – 0.7) mm. CI 0.68 (0.69 – 0.71); MI 0.75 (0.72 – 0.79); OI 0.36 (0.34 – 0.38); SI 1.86 (1.63 – 1.86); LPI 0.73 (0.68 – 0.76); DPI 0.43 (0.41 – 0.47).

Head in full-face view elongate, wider anterad than posterad, posterior margin broadly convex, lateral margin almost straight, median clypeal lobe prominent, in full-face view longer than half the straight line distance from the anterior edge of the antennal sclerite to the anterior-most mandibular edge; lobe apically roughly triangular with bluntly pointed apex, expanding abruptly laterad towards base; lateral clypeal lobe broadly triangular, median lobe meets lateral lobe at an angle. Scape surpasses posterior cephalic border by almost one-half its length; third antennal segment about 2 x length of either second or fourth segments. Compound eye convex and slightly bulging, situated dorsolaterally, interrupting lateral cephalic margin; ED more than one-fourth LCM. Mandible elongate and mostly semi-parallel, widening slightly towards apex; a small gap remains between mandible and clypeus when shut tight; mandible with small basal tooth and larger pre-apical denticle. Mandibular dorsum with fine strigulae and shallow piligerous punctae. Hypostomal tooth not visible in cephalic full-face view. Antennal fossa surrounded by concentric striae, frons mostly reticulate punctuate, densely punctate towards vertex; area posterad of eye striate-punctate; sculpture tends to smoothen on ventral cephalic surface with sparse punctae and shallow arching, fine strigulae. Vertexal carina distinctly visible in cephalic full-face view, carina well developed ventrally, becoming a perpendicular flange at least as wide as half the greatest scape width.

Mesosoma with promesonotal margin forming single convexity in lateral view, metanotal groove well impressed, dorsal propodeal margin slightly convex to almost straight, declivity convex with outline made jagged by transverse striae. Pronotum mostly punctate in lateral view, punctae-striate posterolaterally, dorsum densely punctate; prosternum mostly smooth and shining. Mesopleuron transversely striate, striae fine medially, coarser dorsad and ventrad; metapleuron and lateral propodeum posterad of spiracle transversely striate; mesopleuron separated from mesosternum by carina, carina widest anterad; propodeal spiracle elongate, posterolaterally directed. Metapleural-propodeal suture weakly impressed. Mesonotum and propodeal dorsum transversely striate

Petiole in lateral view triangular, with single anterodorsal broadly convex margin, apex with short blunt tooth that slightly overhangs the slightly convex posterior margin; ventral margin sinuate with anterior tooth. Node punctate laterally, punctae become sparse ventrad; posterior face medially with transverse strigulae and ventrad with coarse striae. Node in dorsal view with elongate tear-drop shape, the slender anterior section gradually becoming wider posterad. Abdominal segments III – IV densely punctulate; segment V sparsely punctulate. Pygidium with median longitudinal crest; hypopygidium with lateral row of setae and ventrally with 2 pairs of arching setae close to base of sting. Body covered with abundant appressed pilosity, standing and decumbent hairs also present. Lateral face of procoxa mostly smooth and shining; posterior face of protibia with 3 – 5 setae, the longest at apex. Body black with blue iridescence; antennae, mandible, femora and tarsi brown; coxae and tibiae dark brown with weak blue iridescence.

Type Material
Holotype worker. Venezuela, Aragua, Parque Nacional Henri Pittier, Rancho Grande via La Cumbre, 1300 m, 22.vii.2001, J. Lattke 2444. One worker deposited in. – Paratypes. From the same nest as the holotype: 4 workers deposited in MIZA, 1w, 1w , 1w , 1w , 1w.

Etymology
The species name is a tribute to William L. Brown, Jr. (1922 – 1997), myrmecologist and mensch. It is an indirect patronym derived from the Spanish “Tío Bill”, and is a translation of “Uncle Bill”. (He eschewed patronyms) Gracias por todo Tío Bill.