Planinasus xanthops Mathis, Rung & Kotrba 2012

Moderately small to medium-sized flies, body length 2.10–3.05 mm. Head: Head ratio 0.56–0.58; frons mostly bare of microtomentum, subshiny to shiny, except for densely microtomentose, anterolateral angles and undercut anterior margin, blackish brown; frons much wider than long, frontal ratio 0.36–0.39; interfrontal seta long, length subequal to that of lateral vertical seta. Antenna yellow; pedicel with ventral projection long, about 1/2 length of basal flagellomere; basal flagellomere long, about twice height at base; arista bearing 13–14 dorsal rays, 3–4 ventral rays; pedicel bearing 1 dorsoapical seta and 1 dorsal seta. Face generally yellow; very wide, facial ratio 0.69–0.73; dorsad of transverse carina wide, shield-like, medial portion in some specimens faintly brownish yellow, very sparsely microtomentose with some silvery white microtomentum; ventral portion of face yellow, sparsely microtomentose, somewhat seriaceous; large facial setae in 2–3 transverse rows; dorsal row with porrect medial pair of setae, next laterally a large, dorsoclinate seta; ventral row with a ventroclinate seta immediately ventrad of dorsoclinate seta, then with 2 smaller, ventroclinate setae. Clypeus yellow to brownish yellow; palpus yellowish brown. Gena concolorous with ventral 1/3 of face. Thorax: Generally dark colored, black to blackish brown, anepimeron paler, brownish, with ventral margin yellowish; mesonotum thinly invested with microtomentum, appearing subshiny, with slightly metallic brown luster medially, becoming more steel blue laterally; postpronotum dark brown; area from postpronotum and extended through notopleuron mostly bare, shiny; anepisternum thinly invested with microtomentum, mostly appearing dull, grayish brown; other pleurites less densely invested. Wing conspicuously and uniformly infumate, brownish, base slightly paler, more hyaline. Coxae, trochanters, and base of femora yellow; remainder of femora and tibiae brownish black; forefemur with a preapical, whitish to yellowish partial annulus; basitarsomeres yellow; remaining tarsomeres becoming darker with apical 1–2 dark brown; forefemur with posteroventral surface bearing 1 large seta at apical 1/3. Abdomen: Uniformly blackish brown to black, mostly shiny, very sparsely invested with microtomentum. Male abdomen: Tergites 1+2–6 well developed, lengths of tergites 3–6 subequal; tergite 7 narrow; sternites 3, 4, 5 generally as rectangular plates, slightly wider than long, lateral margins shallowly arched; sternite 5 with posterior margin of sclerotized portion shallowly arched posteriorly, bearing medially a patch of 10–12 setulae; no sternites 6, 7, neither segment forming an annulus. Male terminalia (Figs 48–51): Epandrium in lateral view (Fig. 48) higher than wide, anterior margin nearly straight, posterior margin irregularly arched, dorsal portion nearly straight, thereafter ventrally recurved to surstylar base, dorsal margin short, length about equal to surstylar width at base, truncate; surstylus length a little longer than half length of epandrium, extended from ventroposterior margin of epandrium in nearly oblique alignment with it, in lateral view (Fig. 48) triangular, tapered to narrow apex, anterior margin nearly straight, posterior margin shallowly sinuous, bearing 1 large, basal seta; hypandrium in ventral view (Fig. 49) more or less V-shaped, arms at attachment with epandrium thin, becoming gradually and slightly thicker toward anterior margin, anterior margin angulate, pointed; pregonite in ventral view (Fig. 49) roughly triangular, with anterior and lateral margins receded and slightly round corners; postgonite in ventral view (Fig. 49) convoluted, with lobe bearing setulae, especially at apex, in lateral view (Fig. 51) irregularly, bearing finger-like lobe with 4 apical setulae; phallus in ventral view (Fig. 49) complex, partially sclerotized, in lateral view (Fig. 51) difficult to discern; phallapodeme in lateral and ventral views (Figs 49, 51) elongate, tubular, nearly straight, in ventral view very gradually tapered to acute point, in lateral view (Fig. 51) parallel sided, truncate apically; ejaculatory apodeme short, length subequal to 1/4 length of phallapodeme, thickened basally, tapered to thin, sinuous apical half without expansion.

(Fig. 52). Neotropical: Ecuador (Orellana).