Apotropina ruidosa, Ramos-Pastrana & Córdoba-Suarez & Riccardi, 2024

Ramos-Pastrana, Yardany, Córdoba-Suarez, Eric & Riccardi, Paula Raile, 2024, Three new species of Apotropina Hendel, 1907 (Diptera: Chloropidae) of the Colombian Andean-Amazon cloud forest, Zootaxa 5512 (3), pp. 435-444 : 438-440

Apotropina ruidosa sp. nov.

( Figs 9–16 , 25–26 )

Diagnosis. Postpedicel rounded, dark brown on upper ¼, yellow on lower ¾ in external surface ( Fig. 9 ); fore coxa dark yellow, darker anteriorly ( Fig. 9 ); all trochanters yellow; all legs with anterior apex of femur, tibia and first tarsomere yellow ( Fig. 9 ); tibial organ narrow, dark gray, ~ 3.3× shorter than hind tibial length ( Fig. 9 ); hind tibial spur straight and shorter than tibia width; surstylus narrowed in profile ( Fig. 13 ); cercus at least 1.5× longer than wide, with straight setae shorter than surstylus length ( Figs 15–16 ).

Description. MALE (holotype). Body length 2.6 mm. Wing length 2.8 mm. Body dark brown with ochre pruinosity. Head ( Figs 9–10 ). Wider than long dorsally and longer than high in profile. Ocellar seta as long as inner and outer vertical setae. Postocellar seta cruciate, ~ ⅔ length of ocellar seta. Three strong fronto-orbital setae, the anterior seta ~ ½ length of posterior setae, the two posterior setae ~ each equal to length of ocellar seta; anterior fronto-orbital seta proclinate the two posterior setae lateroclinate. Inner vertical seta proclinate, outer vertical seta lateroclinate. Frons dark brown basally, apical ¼ yellow, 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. Eye oval, long axis slightly oblique. Face pale yellow, about as high as wide; postpedicel rounded, dark brown on upper ¼, yellow on lower ¾ 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 9, 11 ). Scutum dark brown, ~ 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 brown pruinosity; katepisternum with pale setulae. Scutellum concolorous with scutum, with black pilosity, apical scutellar seta ~ 3× longer than subapical scutellar seta. Halter stem brown, knob yellowish. Wing ( Fig. 12 ). Hyaline; costal ratios measured from h: R 1: R 2+3: R 4+5 is 4: 5: 4: 2; veins R 4+5 and M 1 subparallel; distance between r-m and dm-m 4× length of r-m. Legs ( Fig. 9 ). Dark brown; fore coxa dark yellow, darker anteriorly; all trochanters yellow; all legs with anterior apex of femur, tibia and first tarsomere yellow; tibial organ narrow, dark gray, ~ 3.3× shorter than hind tibia ( Fig. 9 ); hind tibial spur straight and slightly shorter than width of tibia. Abdomen ( Fig. 9 ). Tergites brown to dark brown. Terminalia ( Figs 13–16 ). Postabdominal sclerites asymmetric; syntergosternite 7+8 about as long as hypandrium; sternite 6 slightly curved, wider apically; sternite 5 slightly curved, wider medially, tapering to extremes, ~ 10× 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 in profile, apex narrow and rounded; cercus at least 1.5× longer than wide, with straight setae ~ 1× as short as length of surstylus, cerci fused basally; anal lobe indistinct. Hypandrium with arms closed; basiphallus bottle-shaped, slightly longer than distiphallus; distiphallus sclerotized dorsally; pregonite slightly shorter than postgonite; 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-67353 ) . PARATYPES: same data as holotype (69 ♂ LEUA-67354–67422 ) .

Etymology. The specific epithet “ ruidosa ”, refers to the name “Reserva Natural y Ecoturística La Ruidosa”, the locality where the new species was collected. The name is treated as a noun in apposition.

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 ).

Figures

FIGURES 9–16. Apotropina ruidosa Ramos-Pastrana, Córdoba-Suarez & Riccardi sp. nov. (LEUA-67353). Male. 9, Habitus, left lateral view, black box shows the detail of the tibial organ in the hind tibia; 10, Head, frontal view; 11, Thorax, dorsal view; 12, Wing; 13, Terminalia, lateral view; 14, Terminalia, posterior view; 15, Terminalia, ventral view; 16, Terminalia illustration, ventral view.

FIGURES 25–26. 25, Geographical occurrence for all species of Apotropina of the Colombia; 26, Malaise trap stretched across small stream in habitat of Apotropina longicerci Ramos-Pastrana, Córdoba-Suarez & Riccardi sp. nov., A. ruidosa Ramos- Pastrana, Córdoba-Suarez & Riccardi sp. nov. and A. similis Ramos-Pastrana, Córdoba-Suarez & Riccardi sp. nov.