Apotropina similis Ramos-Pastrana, Córdoba-Suarez & Riccardi, 2024, sp. nov.

Apotropina similis sp. nov. (Figs 17–26) Diagnosis. Postpedicel rounded, dark brown on upper ¾, yellow on lower ¼ in external surface (Fig. 17); fore coxa dark brown (Fig. 17); all trochanters and anterior apex of tibiae yellowish brown (Fig. 17), tibial organ narrow, dark gray, ~ 3.3× shorter than hind tibial length (Fig. 17); hind tibial spur straight and shorter than tibial width; surstylus narrowed in profile (Fig. 21); cercus at least 1.5× wider than long, with straight setae, one seta as long as the surstylus (Figs 23–24). Description. MALE (holotype). Body length 3.1 mm. Wing length 3.3 mm. Body dark brown with ochre pruinosity. Head (Figs 17–18). Wider than long dorsally and longer than high in profile. Ocellar seta as long as inner and outer vertical setae. Postocellar seta cruciate, ~ equal in length to ocellar seta. Three strong fronto-orbital setae, the anterior seta ~ ½ the length of posterior setae, the two posterior setae ~ each equal in length to the ocellar seta; anterior fronto-orbital proclinate, posterior two fronto-orbitals lateroclinate. Inner vertical seta proclinate, outer vertical seta lateroclinate. Frons dark brown basally, yellowish on apical ¼, slightly wider than long, lateral margins diverging posteriorly to vertex, apical margin sinuous. Ocellar triangle extending to ~ ⅔ length of frons, posterior margin nearly as wide as frons, lateral margins straight, apex acute; macula blackish. Eye oval, long axis slightly oblique. Face pale yellow, about as high as wide; postpedicel rounded, dark brown on upper ¾, yellow on lower ¼ in external surface; arista black, with short, sparse pubescence, as long as ½ frons; genal height equal to height of postpedicel, with whitish pruinosity: one vibrissa; occiput and postgena dark brown; proboscis brown; palpus yellow with yellow setulae; clypeus darkened. Thorax (Figs 17, 19). Scutum ~ 1.2× longer than wide, pruinose; postpronotal lobe concolorous with scutum, with two long setae equal in length to notopleural setae; 1+1 notopleural setae; 5 strong dorsocentral setae, prescutellar dorsocentral seta ~ 2× longer than remaining dorsocentral setae; pleuron with gray brown pruinosity; katepisternun with pale setulae. Scutellum concolorous with scutum, with black pilosity, apical scutellar seta ~ 3× longer than subapical scutellar seta. Halter stem brown, knob brownish yellow. Wing (Fig. 20). Hyaline; costal ratios measured from h: R 1: R 2+3: R 4+5 is 4: 5.4: 3.5: 1.9; veins R 4+5 and M 1 subparallel; distance between r-m and dm-m 4× length of r-m. Legs (Figs 17). Dark brown; fore coxa dark brown; all trochanters and anterior apex of tibiae yellowish brown, tibial organ narrow, dark gray, ~ 3.3× shorter than hind tibial length (Fig. 17); hind tibial spur straight and slightly shorter than width of tibia. Abdomen (Fig. 17). Tergites brown to dark brown. Terminalia (Figs 21–24). Postabdominal sclerites asymmetric; syntegosternite 7+8 about as long as hypandrium; sternite 6 curved, wider mesally; sternite 5 curved, wider medially, tapering to extremes, ~ 4.5× longer than wide. Epandrium brown, fusiform in profile, with brown pilosity, without laterobasal projection; subepandrial sclerite V-shaped, base narrower than cerci; surstylus with apical half yellow with short yellow setae, base slightly narrower than epandrial height laterally, apex acute; cercus at least 1.5× wider than long, with straight setae, one seta as long as the surstylus; cerci fused basally; anal lobe indistinct. Hypandrium with arms closed; basiphallus triangular; ~ ⅓ shorter than distiphallus; distiphallus sclerotized dorsally; pre- and postgonite equal in length; sperm pump indistinct. FEMALE. Unknown. Type material. HOLOTYPE ♂, deposited in LEUA: COLOMBIA, Caquetá, Florencia, Vda.[Vereda] Sucre, 01º52′12″N / 75º40′09″W, 2292 m [eters], 26–28.Sep [IX].2023, Y. Ramos-Pastrana Leg. / Captura con trampa Malaise colocada a nivel de un sistema lótico (al aire) / (LEUA-67423). PARATYPES: same data as holotype (16 ♂ LEUA-67424–67439). Etymology. Latin similis, meaning like, resembling; referring to the external morphological similarity with A. ruidosa sp. nov. and A. longicerci sp. nov. Geographical occurrence. Colombia (Caquetá, Florencia) (Fig. 25). Habitat. The specimens were collected in a Malaise trap placed over a creek in the Low Montane Rainforest with dense secondary vegetation in the Andean-Amazonian transition corridor of Colombia (CAM 2018) (Fig. 26).