Helina dorada, Patitucci, Luciano Damián, Mulieri, Pablo Ricardo & Mariluis, Juan Carlos, 2016

Patitucci, Luciano Damián, Mulieri, Pablo Ricardo & Mariluis, Juan Carlos, 2016, Taxonomic review of the species of Helina R. - D. (Diptera: Muscidae) from Andean-Patagonian forests, Zootaxa 4150 (3), pp. 281-313 : 297-300

Helina dorada sp. nov.

( Figs. 8 , 9 G)

Description. Male ( Fig. 8 A). Length. Body: 7.91–8.47 mm, wing: 8.22–8.93 mm.

Head ( Fig. 8 B). Black with silver pollinosity Holoptic, the shortest distance between eyes is 0.14–0.23 mm. 6– 8 pairs of frontal setae. Eye hairs long and numerous. Lunule pale brown; fronto-orbital plate, parafacial, gena, postgena, and occiput black with silver pollinosity. Parafrontal plate bare. Postocular setae proclinate. Antenna black; arista with hairs shorter than basal diameter. Palpus black.

Thorax ( Fig. 8 C). Scutum black with two white pollinose vittae; scutellum black with golden-brown pollinosity; anepisternum, anepimeron, katepimeron, katepisternum, proepisternum, proepimeron and meron black; anterior and posterior spiracles brown. Chaetotaxy: acrostichal setae 1-2+1; dorsocentral setae 2+4; humeral setae 3; notopleural setae 2, of similar size. Prealar seta strong, half as long as its anterior supra-alar postsutural seta. Scutellum with thinner and long basal and subapical setae. Anepisternum with a series of 8–10 strong setae.

Wing. Yellowish-brown; costal spine little longer than the costal bristles; the transverse cross-vein dm-cu slightly curved; vein R 4+5 and vein M diverge apically; cross vein dm-cu in basal half of cell r4+5. Both calypters hyaline with yellow margins.

Legs. Coxa and trochanter dark brown; femora and tibiae yellow, tarsi dark brown. Fore femur with rows of dorsal, posterodorsal, and posteroventral setae; fore tibia with one posterior seta, 4 preapical setae. Mid femur with 6–7 setae in the basal middle on ventral surface; and 2–3 preapical setae on dorsal to posterior surface; mid tibia with 2–4 posterior setae and 4 apical setae (anterodorsal, posteroventral, ventral, and anteroventral). Hind femur with anterodorsal row of setae and 6–7 setae in the apical middle of anteroventral surface; hind tibia with 5–6 anteroventral setae, 2 anterodorsal setae and 5–6 posterodorsal setae, calcar absent. Claws and pulvilli of similar size in all three legs.

Abdomen ( Fig. 8 D). Black with golden-yellow pollinosity. Sternite 5 longer than wide, setulose; posterior margin with two flat and membranous processes ( Fig. 8 E).

Terminalia . Cercal plate with a similar length and width, with a distal incision; and with four protuberances at the apex: inner protuberance long and slightly curved, outer protuberance short and curved backward ( Fig. 8 F). Surstylus very broad basally, narrow distally, and with several setae on inner surface at distal part ( Fig. 8 G). Aedeagus with aedeagal apodeme straight and strongly sclerotized; epiphalus slightly sclerotized, paramere slightly sclerotized with setula; gonopod with short setulae; and distiphallus curved, slightly sclerotized ( Fig. 8 H).

Female. Length. Body: 7.30–7.73 mm, wing: 7.37–8.27 mm.

Differs from male as follows: Head: dichoptic, the shortest distance between eyes is 0.90–1.07 mm; frontoorbital plate setulose with 2 reclinate orbital setae. Eye hairs short and sparse. Parafrontal plate with few little hairs.

Parafacialia with silver-brown pollinosity. Postocular setae divergent. Thorax ( Fig. 8 I). Black with two yellowbrownish pollinose vittae. Legs. Mid femur with a row of setae on ventral surface shorter toward the apex; mid tibia with 3–4 posterior setae and 2 anterodorsal setae. Hind femur with 2–3 setae in the apical middle of anteroventral surface; hind tibia with 2–3 anteroventral setae, 2–3 anterodorsal setae. Claws and pulvilli smaller than male.

Terminalia . Tergite 8 with 2 parallel sclerotized plates, fused and with setulae on distal margin; epiproct with proximal margin straight and setulose, cercus digitiform with long setulae ( Fig. 8 J). Hypoproct rounded, sclerotized, with a row of long setula on distal magin ( Fig. 8 K).

Type material. Holotype male, pinned, abdomen dissected and pinned below, label: “Arg. Chubut, Parque Nacional / Lago Puelo (Gendarmería Malaise) / 42° 05,847’ S 71° 40,937’W / I-2012 Mulieri & Patitucci leg.” ( MACN) . Paratypes: two females, pinned: “ Arg. T. del Fuego / L. Fagnano / I-99 Mariluis ” ( MACN), one female, pinned: “ Arg. T. del Fuego / L. Fagnano / I-99 Mariluis ” ( IFML) .

Other material examined. ARGENTINA: Neuquén: 1 female, Cerro Chapelco, -40.197050, -71.298453, III-1983, Gentilli leg. ( IFML) , 1 female, Villa La Angustura, -40.763229, -71.646313, 25-II-1994, Mariluis leg. (MACN); Río Negro: 1 male, PN Nahuel Huapí, Llao Llao, -41.046, -71.572, 8-I-1962, ( MACN) ; Santa Cruz: 20 females , 1 male, PN Los Glaciares, Península Magallanes, Río Mitre , -50.418967, -72.742651, I-II-1995, Mariluis leg. ( MACN) ; Tierra del Fuego: 14 females , 1 male, Lago Fagnano, -54.537434, -67.223272, I-1982, Gondell leg. (MACN), 1 female, PN Ushuaia, -54.834897, -68.446657, II-1996, Mariluis leg. (MACN).

Distribution ( Fig. 9 G). ARGENTINA: Chubut, Neuquén, Río Negro, Santa Cruz, Tierra del Fuego.

Remarks. Helina dorada sp. nov. is similar to H. australis , but is distinguished by the short hairs of the arista, general coloration, the number of setae in the basal middle of ventral surface of the mid femur, the number of setae of the mid tibia, and the shape of the cercal plate and surstylus.

Biology. The specimens captured by JCM in Santa Cruz and Tierra del Fuego provinces were collected over rotten meat with a hand net.

Etymology. The specific epithet is a Spanish adjective agreeing in gender with Helina , meaning “golden”.

Figures

FIGURE 8. Helina dorada sp. nov. A – H. Male: A. Lateral view (scale bar: 1 mm). B. Head, frontal view. C. Thorax, dorsal view. D. Abdomen, dorsal view (scale bars: 0.5 mm). E. Sternite 5 (scale bar: 0.2 mm). F. Cercal plate, posterior view. G. Cercal plate, and surstyli, lateral view (scale bar: 0.1 mm). H. Phallic complex, lateral view (scale bar: 0.1 mm). I – K. Female: I. Thorax, dorsal view (scale bars: 0.5 mm). J. Apical portion of ovipositor, dorsal view. K. Apical portion of ovipositor, ventral view (scalebar: 0.5 mm). (Abbreviations: aed apod, aedeagal apodeme; distiph, distiphallus; epiph, epiphallus; epiprct, epiproct; gon, gonopodo; hyprct, hypoproct; i protub, inner protuberance; o protub, outer protuberance; par, paramere; st 8, sternite 8; tg 8, tergite 8.)

FIGURE 9. Geographical distribution. A. Helina araucana sp. nov. B. Helina australis Carvalho & Pont. C. Helina bigoti Malloch. D. Helina chilensis Malloch. E. Helina connexa Malloch. F. Helina discolor (Stein). G. Helina dorada sp. nov. (Green area: Andean-Patagonian forests; orange circle: new records; blue triangle: previous distribution.)