Hirotophora chilensis, Ament, 2018

Ament, Danilo César, 2018, Taxonomic revision of the genus Hirotophora Brown et al. (Diptera: Phoridae) with the description of a new species from Chile, Zootaxa 4394 (4), pp. 549-558 : 551-552

Hirotophora chilensis sp. n.

( Figs 1 , 4, 5, 10, 13–15 , 20, 24, 25 , 32–37 ) Undescribed species from Chile: Brown, 1992.

Diagnosis (female) Abdominal segment 3 with small rounded spiracle over tergite, segment 4 with pair of lateral linear spiracles over tergite, segments 5 and 6 without spiracle openings ( Figs 4, 5, 10 ). (male) General body color brown; transverse dorsal setal ctenidia of hind tibia reaching its anterior face.

Material examined. Holotype: ♀, CHILE, Llanquihue Lago Chapo, 41.45°S 72.5°W, 26.ii.1988, sweeping, 200m, L. Masner col. ( LACM) . Paratypes: CHILE, 1♀, Osorno , Puyehe NP, Anticura, 12–14.ii.1988, yellow pan traps, L. Masner col. ( LACM) ; 1♂, Llanquihue N. Correntoso, NE Puerto Montt, 41.47°S 72.48°W, x–xi.1989, Malaise trap, L.E. Peña col ( LACM) ; 1♂, Chiloe Island , Ahori Alto, iii.1988, Malaise trap, 70m, L. Peña col. ( LACM) ; 1♂, Chiloe Island , Dalcahue, i.1962, L. Peña col. ( MZSP) ; 1♂, Osorno , Puyehue NP, ca Anticura, ii.2013, L. Masner col. ( LACM) .

Description. (female) Body length, 2.9 mm ( Fig. 1 ). Frons dark brown, shining. Flagellomere 1 light brown, slightly darker anteriorly. Palpus light brown. No genal setulae. Scutum, scutellum and pleural regions brown. Forefemur with ventral row of 6–8 strong setulae near apex of anterior face. Legs yellowish-brown, except midcoxa and hind tibia brown. Foremetatarsus width/length ratio, 0.28. Midtibia with series of transverse setal ctenidia ¯ four basal most ctenidia occupying dorsal face, other restricted to the posterodorsal face. Hind femur height/length ratio, 0.43. Hind tibia with one anterodorsal seta in basal half and series of 13 transverse dorsal setal ctenidia. Wing slightly brownish. Halter yellowish-brown. Tergites dark brown, with yellow posterior band. Abdominal segment 2 with pair of rounded spiracles on the pleura, segment 3 with pair of rounded spiracles over tergite, segment 4 with pair of linear spiracles over tergite, segments 5 and 6 without spiracle openings ( Figs 4, 5, 10 ). Sternite 8 conspicuous, with posterior margin approximately linear ( Figs 14, 15 ).

(male) Similar to females. Hypopygium light brown, as described for the genus, hypoproct with six setae ( Figs 32–35 ). Phallus as described for the genus, with epiphallus scales long, with rounded tips apically projecting in a filament which connects to the immediately below scale ( Figs 36, 37 ).

Geographical distribution. Known from three close localities in central Chile.

Figures

FIGURE 1–2. 1. Hirotophora chilensis sp.n. female habitus, holotype. Scale bar = 1mm. 2. Hirotophora dividua female habitus.Scale bar = 1mm.

FIGURES 4–13. Hirotophora abdominal structures. 4, 5, H. chilensis abdomen in lateral and dorsal view; 6, 7, H. dividua abdomen in lateral and dorsal view; 8, 9, H. multiseriata abdomen in lateral and dorsal view; 10, H. chilensis abdominal segments 3–5 in lateral view; 11, H. multiseriata abdominal segments 3–5 in lateral view; 12, H. dividua flap-like spiracle opening of segment 6 and internal gland externalized; 13, H. chilensis segments 6 and 7 in dorsal view showing the internal anteriorly directed rod of segment 7.

FIGURES 14–19. Hirotophora oviscapes. 14, 15, H. chilensis oviscape in ventral and dorsal view respectively; 16, 17, H. dividua oviscape in ventral and dorsal view respectively; 18, 19, H. multiseriata, oviscape in ventral and dorsal view respectively.Abbreviations:cerc, cercus, S8, sternite 8, T9+10, tergite 9+10.

FIGURES20–31. Hirotophora male heads,wings and hind femora.20–23, headof H.chilensis, H.dividua, H.flavimarginata and H.multiseriata respectively; 24, 25, H.chilensis wing and hind femur; 26, 27, H.dividua wing and hind femur; 28, 29, H. flavimarginatawing and hind femur; 30, 31, H.multiseriata wing and hind femur.

FIGURES 32–35. Hirotophora chilensis hypopygium. 32, dorsal; 33, ventral; 34, left lateral; 35, right lateral. Abbreviations: cerc, cercus; ep, epandrium;hyp, hypandrium; hyprct, hypoproct; phal, phallus.

FIGURES 36–41. Hirotophora phallus in left lateral view. 36, 37, H. chilensis phallus general structure and epiphallus scales respectively; 38, 39, H. dividua phallus general structure and epiphallus scales respectively; 40, 41, H. multiseriata phallus general structure and epiphallus scales respectively. Abbreviations: bs, basiphallus; cp, core plate; epi, epiphallus; rp, right plate. Scale bar = 0.05mm.