Stenopygium nubeculum Becker, 1922: 75 Brooks 2005: 109 Yang et al . 2006: 202 New records of Stenopygium Becker (Diptera: Dolichopodidae) from the Neotropical Region, and a key to species Soares, Matheus M. M. Ale-Rocha, Rosaly Zootaxa 2020 2020-10-23 4868 1 129 134 524P8 Becker, 1922 Becker 1922 [151,620,1736,1763] Insecta Dolichopodidae Stenopygium Animalia Diptera 0 129 Arthropoda species nubeculum  ( Figs 1–8, 17)      Stenopygium nubeculum Becker, 1922: 75; Robinson 1970: 40.52 (catalog);  Brooks 2005: 109(review);  Yang et al. 2006: 202(catalog).  Examined material.   Bolivia, Cochabamba, 105 kmE Cochabambaat Rio Carmen Mayo, 17°8ʹ47ʺS 65°43ʹ55ʺW,   1800 m, FIT,  8–12.ii.1999, F. Génier, 99-058 ( 3♀, CNC); idem, low cloud forest,  1–6.ii.1999, 99-025 ( 1♀, CNC); idem,  17°8ʹ51.24ʺS 65°43ʹ50.40ʺW,  1750 m, FIT,  1–6.ii.1999, R. S. Hanley( 3♂, 1♀, CNC); Santa Cruz, 32.8 kmNW Comarapa, Kara Huasi, Yungas de la Siberia, 17°49ʹ20ʺS 64°42ʹ31ʺW, 2400 m, Yungas, FIT, 28–30.i.1999, F. Génier, 99-107 ( 1♀, CNC).   Ecuador, Loja, Zamora[ 4°01′04.0″S 79°11′30.2″W],  1800 m,  26.xi.1970, L.E. Peñacol. ( 7♂, 6♀, MZUSP);  idem,  1200 m,  25.xi.1970( 6♂, 4♀, MZUSP; 6♂, 6♀, INPA; 4♂, 2♀, NMNH);  idem,  1900 m( 3♂, MZUSP);  Papallacta (Quito Baeza)[ 0°22′41.0″S 78°08′37.2″W],  2600 m,  12.i.1971( 4♂, MZUSP);  idem,  3000 m,  12–14.i.1971( 1♂, MZUSP);  Napo, Baeza[ 0°27′59.2″S 77°53′27.4″W],  1900 m,  9.ii.1983, Masner& Sharkey( 2♂, CNC);  idem,  ii.1983( 2♂, CNC);  Tandapi[ 0°24′48.1″S 78°47′51.3″W]  40 kmSW Quito,  1300–1500 m,  15–21.vi.1965, Pena( 38♂, 28♀, CNC).   Distribution. Bolivia, Peru( Yang et al. 2006) and Ecuador* ( Fig. 17).   Remarks.Specimens of  Stenopygium nubeculumare relatively rare in collections. Before the present study, only the typeseries of the species was known, from Mapiri, Bolivia[ 15°18′22.4″S 68°13′24.8″W] (at elevations above 2,000 m) and Callanga, Peru[ 12°27′52.8″S 71°58′19.5″W] ( 1,200 m). Additionally, all 128 specimenslisted here were collected above 1,000 meters, which may indicate habitat preference for higher altitudes in this species. The female terminalia of  S. nubeculum, illustrated here for the first time ( Figs 7–8), is very similar to that of  S. punctipennis, differing only in the number of spines of the acanthophorite (six in  S. nubeculum, five in  S. punctipennis), and this corroborates the small clade in Dolichopodinaeformed by  CheiromyiaDyte,  StenopygiumBecker,  PelastoneurusLoew,  PlatyopsisParentand the Nearctic and Neotropical species of  ParacliusLoew. Thisclade is supported by the fusion in the anterior portion of tergite 8 to sternite 8 infemales ( Fig. 8) ( Brooks 2005; Capellari & Amorim 2009).   FIGURES 1–6.  Stenopygium nubeculum Becker, 1922. 1.Head, anterior view (♂); 2–3.Head, lateral view: 2.Male; 3.Female; 4.Wing (♂); 5.Mesonotum, dorsal view (♂); 6.Hypopygium, lateral view. Abbreviations: C—costal vein; dc s—dorsocentral seta; dm-m—discal medial crossvein; M 1—first branch of media; M 4—fourth branch of media; R 4+5—third branch of radius. As pointed out by Brooks (2005), the relationships between  Stenopygium,  Pelastoneurusand  Platyopsisremain uncertain and inconclusive. We found species of  Pelastoneurusthat share diagnostic characters with  Stenopygium, such as a bulging clypeus of length equal to that of the face, also present in an unidentified species ( Fig. 15) collected in the same locations in Ecuadorfrom which  S. nubeculumspecimens were collected. This feature is also shared with several other New World species of  Pelastoneurus( Brooks 2005). The long, thin cercus of  S. nubeculumis also shared with an unidentified species of  Pelastoneurusfrom Brazil( Fig. 16). However, all species of  Pelastoneurusmentioned here have the dorsal and ventral microtrichia of the arista-like stylus longer than lateral microtrichia ( Fig. 15), five pairs of dorsocentral setae and absence of wrinkles in the phallus. Future studies of the Andean fauna of Dolichopodinaemay help to resolve the relationships between these genera, which are still poorly characterized. 3017381326 [393,1432,1870,1896] Bolivia -17.146389 Rio Carmen Mayo 21 -65.73194 0 129 1 Cochabamba 3017381320 [151,825,1908,1932] 1999-02-08 1999-02-12 1999-02-08 CNC F. Genier 1800 0 129 3 3 3017381323 [839,1430,1908,1932] 1999-02-01 1999-02-06 1999-02-01 CNC F. Genier 1800 0 129 1 1 3017381313 1999-02-01 1999-02-06 1999-02-01 R, CNC S. Hanley 1750 -17.147566 Santa Cruz 1 -65.73067 0 129 4 1 3 Santa Cruz 3017381329 [282,1432,2014,2040] 1970-11-26 MZUSP L. E. Pena Ecuador 1800 -4.017778 Zamora 1 -79.19173 0 129 13 6 7 Loja 3017381331 [151,994,151,176] 1970-11-25 MZUSP, INPA, NMNH 1200 1 130 28 12 16 3017381314 [1005,1315,151,176] 1970-11-25 MZUSP 1900 1 130 3 3 3017381305 1971-01-12 MZUSP 2600 -0.37805557 1 -78.14366 1 130 4 4 3017381318 [979,1432,187,212] 1971-01-12 1971-01-14 1971-01-12 MZUSP 3000 -0.37805557 1 -78.14366 1 130 1 1 3017381302 [151,1151,222,248] 1983-02-09 CNC Masner & Sharkey 1900 -0.46644443 Baeza 1 -77.890945 1 130 2 2 Napo 3017381306 [1162,1432,223,248] 1983-02 CNC Masner & Sharkey 1900 -0.46644443 Baeza 1 -77.890945 1 130 2 2 Napo 3017381311 [151,1334,258,284] 1965-06-15 1965-06-21 1965-06-15 CNC Pena 1400 -0.4133611 Tandapi 1 -78.797585 1 130 66 28 38 Napo