Limnophora bifasciata, Fogaça & de Carvalho, 2015

Fogaça, João Manuel & de Carvalho, Claudio J. B., 2015, Seven new species of Limnophora Robineau-Desvoidy (Diptera: Muscidae) from Ecuador, Revista Brasileira de Entomologia 59 (3), pp. 210-221 : 212-213

Limnophora bifasciata sp. nov. ( Figs. 7–12 )

Diagnosis. This species is easily differentiated by the dorsocentral setae 2 + 3. Vein R 1 with conspicuous setulae on apex of dorsal surface. Prescutum dark brown with 2 conspicuous white vittae that begin narrow and end wider (triangular) on scutum.

Description. Male. Measurements (n = 5): Length: Body: 5.6–6.4 mm (6.0 mm). Wing: 4.7–6.09 mm (4.96 mm).

Color. Face gray pollinose. Antenna and arista dark brown. Palpus dark brown. Calypters uniformly whitish, margin yellowish; lower calypter more conspicuous. Halter yellowish. Wing hyaline yellowish with conspicuous brown cloudy spots at the costal margin of apex of vein R 2+3. Prescutum dark brown with 2 conspicuous short white vittae that enlarge toward scutum; humeral callus and notopleura gray pollinose; scutum dark brown; scutellum dark brown. Pleurae dark brown with katepisternum mostly gray pollinose. Legs dark brown. Abdomen with median longitudinal silver vittae and dark brown with silver lateral round areas on all tergites.

Head. Holoptic, distance between eyes 0.03–0.06 (0.05) times head width, eye finely and sparsely ciliated.Inner and outer vertical setae equal in length with ocellar seta. Frontal setae in 6–8 (6) pairs; 1 proclinate orbital seta. Ocellar setae long; ocellar triangle a tuft of hairs. Flagellomere I about 1.7–2.4 (1.7) times pedicel length, ends prior to vibrissa insertion. Hairs on arista shorter than diameter of arista at base. Parafacial and fronto-orbital plate bare. Palpus filiform slightly dilated apically.

Thorax. Chaetotaxy. Acrostichals 0 + 1; dorsocentrals 2 + 3; intra-alars 2 + 2; supra-alars 2; basal postpronotals 2; notopleurals 2 postsupra-alars 2. Scutellum with well developed lateral, apical scutellar. Anepisternum with 6–7 (6) setae, long; katepisternal seta 1 + 2. Prosternum setulose.

Legs. Fore femur with complete rows of posterodorsal and posteroventral setae; fore tibia with 2 apical setae (dorsal and posteroventral). Mid femur on ventral surface with 5 stronger setae on basal half, posterior surface with 2 pre-apical setae. Mid tibia with 1 supra-median and sub-median setae on posterior surface; 4 apical setae (anterior, ventral, anteroventral and posteroventral). Hind femur with complete row of setae on anterodorsal surface and anteroventral surface with 4–5 (4) setae on apical half; ventral surface with 5 setae on basal half; hind tibia with 1 median seta on anterodorsal and posterodorsal surfaces; 3 apical seta (ventral and dorsal and anteroventral).

Wing. Vein R 1 with conspicuous setulae on apex dorsal surface; Rs node and base of vein R 4+5 setulose dorsally and ventrally; vein dm-cu slightly sinuous; apical portion of vein M bent toward vein R 4+5.

Abdomen: Tergite III with row of setae on margin; tergite I with 1 pair median marginal seta; tergite V with row of setae on margin and 1 pair median marginal seta on tergite V. Sternite 1 bare; sternite 5 triangular, longer than wide, with few and sparse setae and two apically developed ( Fig. 7 ).

Terminalia. Cercal plate longer than wide, with median fusion, with few and sparse setae on inner apex; surstylus smaller than length than cercal plate ( Fig. 8 ). Distiphallus long, 2.5 times the length of pregonite; postgonite curved and shorter than epiphallus ( Fig. 9 ).

Female. Length: Body: 4.8–6.4 mm. Wing 5.68–6.24 mm. Similar to male, but dichoptic, distance between eyes 0.36–0.40 head width. Frontal seta with 5 setae, 2 fronto orbital setae, anterior reclinate; inner vertical setae convergent; outer vertical setae divergent. Fronto-orbital plate with few setulae. Thorax with wide brown vitta and 2 narrow gray vittae.

Type-material

Holotype. Male : “ E. Papallacta \ (Quito Baeza) \ Ecuador. 2900 m. I-1-71 \ L. E. Peña col. [white printed label]”; “ Holotipo [red printed label]” ( MZSP) . Paratypes. Ecuador, 23 males ( MZSP, DZUP) , 17 females ( MZSP, DZUP), same data as holotype; LOJA CAJANUMA : 1 male, “13074 ( EC) Loja: Cajanuma \ Podocarpus National Park , trail Oso \ de anteojos, 3000 m, 16/02/2009 -\ 20/02/2009 ( YPT), leg. Marc Pollet & \ Anja De Braekeller , sorted by Marc \ Pollet–sample code: EC/2009-\ 31/ MP &ADB-012” ( UTPL) .

Distribution. ECUADOR: Loja (Cajanuma), Napo (Quito).

Etymology. Adjective, agreeing in gender with the feminine Limnophora . The epithet refers to the two conspicuous short white vittae on prescutum extending wider to scutum (from de Latin bi = two, fasciata = vitta, stripe).

Figures

Figs. 7–9. Limnophora bifasciata sp. nov., male terminalia: 7. Fifth sternite, dorsal view; 8. Epandrium, surstylus and cercal plate, posterior view; 9. Aedeagus, lateral view (scale 1 mm).

Figs. 10–12. Limnophora bifasciata sp. nov., male: 10. Lateral view; 11. Dorsal view; 12. Frontal view.