Fontidessus wheeleri K. B. Miller ex K. B. Miller & Spangler 2008

Measurements. TL = 1.2–1.3 mm, GW = 0.6–0.7 mm, PW = 0.5–0.6 mm, HW = 0.4–0.5 mm, EW = 0.2–0.3 mm, TL/GW = 1.7–1.8, HW/EW = 1.6–1.7. Body (Fig. 9) oval, elongate; lateral outline slightly continuous between pronotum and elytron; lateral margins of pronotum gently curved; lateral margins of elytron evenly and gently curved. Coloration. Head yellow brown, brown along posterior margins and medial margins of eyes; pronotum broadly brown along posterior margin, narrowly dark brown along anterior margin; elytron brown with the following yellow maculae: 1) a basal macula in an irregular band extending posteriorly along suture at medial margin, 2) a lateral longitudinal macula posterior to humeral angle, broader anteriorly and extending posteriorly in narrow band to near apex, 3) a subtriangular subapical macula (Fig. 9). Ventral surfaces of thorax and abdomen dark brown except prosternum, prosternal process, propleuron and pronotal epipleuron yellow-brown; appendages yellow to yellow-brown. Sculpture and structure. Head with very fine, inconspicuous, irregular punctation, surface between punctures shiny, without distinct microsculpture; eyes medium in size (Fig. 9, HW/EW = 1.6–1.7). Pronotal surface similar to that of head, with posterior surface with fine microsculpture; with posterior angles obtuse; lateral bead slender, of even width throughout; pronotal striae finely incised, extending nearly 1/2 distance across pronotum (Fig. 9). Elytron with anterolateral angle obtuse, not extended anteriorly (Fig. 9); surface similar to pronotum, with microsculpture indistinct. Prosternal process elongate and slender, lateral margins slightly concave, apex of process rounded (Fig. 16); metacoxal process with lateral lobe small. Pro- and mesotarsi relatively narrow in both male and female, but slightly broader in male. Metatrochanter very large relative to metafemur (Fig. 23). Male genitalia. Median lobe in ventral aspect broad, tapering slightly, apically bifid and slender, deeply and narrowly emarginate medially, with short, hyaline, sub-triangular lobes subapically on each side (Fig. 30A); in lateral aspect moderately broad, curved, with apical portion evenly tapered to pointed apex (Fig. 30C). Lateral lobe elongate, expanded apically, broadly rounded at apex, with series of long setae along dorsal margin (Fig. 30B).

This species is known only from a few localities along the far western margin of the Guiana Shield around Puerto Ayacucho (Fig. 31). Specimens have been found in hygropetric situations.