Planinasus neotropicus Mathis, Rung & Kotrba 2012

Small to moderately small flies, body length 1.80–2.55 mm. Head: Frons mostly bare, shiny, except for densely microtomentose, velvety-appearing, anterolateral angles; frons slightly wider than long, frontal ratio averaging 0.65; interfrontal seta short, about 1/2 length of lateral vertical seta. Antenna unicolorous, blackish brown; pedicel with ventral projection short, not extended anteriorly much beyond dorsal margin; basal flagellomere short, width about 2/3 length; arista bearing 8-9 dorsal rays, 3-4 ventral rays. Face comparatively narrow; facial ratio averaging 0.25; dorsal half of face shield-like, mostly bare, roughly pentagonal, with yellowish to slightly bluish reflections; facial setae more or less in 2 transverse rows, dorsal row with 4 setae, 2 dorsoclinate, 2 ventroclinate; ventral facial row with 4 ventroclinate setae. Clypeus and palpus blackish brown. Thorax: Generally dark brown but with some paler, mostly yellowish areas along margins of sclerites; mesonotum moderately invested with whitish gray microtomentum, appearing dull medially, becoming subshiny, less microtomentose laterally; postpronotum yellowish; area from postpronotum and through notopleuron mostly bare, shiny; anepisternum moderately invested with very fine microtomentum, mostly appearing dull; other pleural areas less densely invested. Wing very faintly infumate, without pattern. Coxae whitish yellow; femora whitish yellow basally, distal 1/2–1/3 dark brown; forefemur lacking a preapical annulus; basal 1/3 of tibiae dark brown, thereafter gradually becoming yellowish; tarsi yellowish, apical 2-3 tarsomeres darker; forefemur bearing 2 setae at apical 1/3 along posteroventral surface. Abdomen: Uniformly blackish brown, mostly subshiny, moderately invested with microtomentum. Male abdomen: Tergites 1+2-6 well developed, lengths of tergites 3-6 subequal; sternite 3 only slightly wider than long, posterior margin sinuous with a medial, moderately broad, rounded projection; sternite 4 with width over twice length, sclerotized portion deeply emarginate, widely W-shaped with broad portion membranous posteriorly; sternite 5 with width over twice length, anterior margin with shallow, medial depression, lateral margins becoming slighter wider posteriorly, posterior margin shallowly emarginate, posterolateral corners rounded; sternite 6 apparently absent; sternite 7 well developed but narrow, forming an annulus with tergite 7. Male terminalia (Figs 15–18): Epandrium in lateral view (Fig. 15) narrowly trapezoidal, dorsal margin truncate, straight; surstylar length slightly less than half length of epandrium, extended from ventral margin of epandrium, in nearly vertical alignment with epandrium, in lateral view (Figs 15–16) digitiform on apical 2/3, with anterior and posterior basal margins bulged, apex bluntly rounded to truncate, bearing 1 large, sub-basal setula; hypandrium in ventral view (Fig. 16) V-shaped with anterior, angulate portion of V thickened; postgonite in ventral view (Fig. 16) convoluted, with robustly developed lobe expanded apically, invested with numerous setulae, lobe in lateral view (Fig. 18) irregularly clavate with uneven expansion, apical portion bearing approximately 20 setulae; phallus large, in ventral view (Fig. 16) complex, partially sclerotized; phallapodeme in lateral and ventral views (Figs 16, 18) elongate, tubular, truncate apically; ejaculatory apodeme in lateral view (Fig. 17) long, length subequal to that of phallapodeme, clavate, apex only moderately expanded.

(Fig. 19). Neotropical: Belize, Bolivia (La Paz), Costa Rica (Cartago, Guanacaste, Heredia, Limón, Puntarenas), Ecuador (Orellana), Panama, and Peru (Cuzco, Madre de Dios), Venezuela (Aragua).