Helina bigoti Malloch, 1934

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 : 289-290

Helina bigoti Malloch, 1934

( Figs. 4 , 9 C)

For a complete list of references, see the catalog by Carvalho et al. (2005).

Information subsequent to this catalog: Löwerberg-Neto & Carvalho 2009 (endemism). Löwerberg-Neto et al. 2011 (biogeography); Löwerberg-Neto & Carvalho 2013 (checklist, new records).

Redescription. Male ( Fig. 4 A). Length. Body: 6.30–7.93 mm, wing: 4.92–6.98 mm.

Head ( Fig. 4 B). Black with silver pollinosity. Holoptic, the shortest distance between eyes is 0.15–0.24 mm. 8– 10 pairs of frontal setae. Eye hairs long and sparse. Lunule dark brown; fronto-orbital plate, parafacial, gena, postgena, and occiput black with silver pollinosity. Parafrontal plate bare. Postocular setae proclinate. Antenna dark brown; arista plumose, with hairs four times as long as its basal diameter. Palpus dark brown.

Thorax ( Fig. 4 C). Scutum black with three white pollinose vittae, the central vitta is inconspicuous; scutellum black; 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 3–4; notopleural setae 2, posterior seta smaller. Prealar strong, two-thirds the length of the 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 straight; cross vein dm-cu in basal half of cell r4+5. Both calypters yellow with yellow margins.

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

Abdomen ( Fig. 4 D). Dark brown with grey pollinosity. Sternite 5 longer than wide, with several strong setae on the apical third; posterior margin membranous ( Fig. 4 E).

Terminalia . Cercal plate longer than wide, with a distal incision; and with two protuberances ( Fig. 4 F), curved backwards at the apex ( Fig. 4 G). Surstylus straight, broad distally, with setae on inner surface ( Figs. 4 F–G). Aedeagus with aedeagal apodeme curved strongly sclerotized, and dilated at the apex; epiphalus sclerotized, paramere slightly bent downward with setula; gonopod with short setulae; and distiphallus tubular, straight, and slightly sclerotized ( Fig. 4 H).

Female. Length. Body: 6.00– 6.99 mm, wing: 5.95–6.66 mm.

Differs from male as follows: Head: dichoptic, the shortest distance between eyes is 0.74–0.80 mm; frontoorbital plate setulose with 2 reclinate orbital setae. Postocular setae divergent. Parafrontal plate setulose. Legs. Mid and hind femora black, with a little more than the apical third yellow. Mid femur with a row of anterior setae in the basal middle; 2–3 setae in the apical third of anteroventral surface. Hind femur with only an anterodorsal row setae, and 3 long and curved setae in the basal third on anteroventral surface, hind tibia with only 2 anteroventral setae and 3 anterodorsal setae.

Terminalia . Tergite 8 with 2 parallel sclerotized plates, fused and with setulae on the distal margin; epiproct with proximal margin curved, and setulose, cercus digitiform with long setulae ( Fig. 4 I). Hypoproct rounded, sclerotized, with long setulae on distal margin ( Fig. 4 J).

Type material examined. ( MNRJ). Paratype 1 male, pinned, in good condition, labels: “ Castro [printed] [crossed out] Ancud [handwritten] / Isla Chiloe / Chile Dec 1926 / R & Shannon [printed]” on white paper; “ Paratype No [printed] / 49856 [handwritten] / U.S.N.M. [printed]” on red paper; “ Helina bigoti / Malloch, 1934 [handwritten] / C.J.B. Carvalho det. 198 [printed] 5[handwritten]” on white paper; “ Helina / flavisquama” handwritten on white paper; “ ♂ ” handwritten on white paper; “M.N.R.J [printed] / 1433 [handwritten]” on white paper, black frame . Paratype 1 male, pinned, “ Castro / Isla Chiloe / Chile Dec 1926 / R & Shannon ” printed on white paper; “ Paratype No [printed] / 49856 [handwritten] / U.S.N.M. [printed]” on red paper; “ Helina / bigoti ” handwritten on white paper; “ ♂ ” handwritten on white paper; “M.N.R.J [printed] / 1431 [handwritten]” on white paper, black frame . Paratype 1 female, pinned, abdomen pinned below in glass vial, “ Castro [printed] [crossed out] Ancud [handwritten] / Isla Chiloe / Chile Dec 1926 / R & Shannon [printed]” on white paper; “ Paratype No [printed] / 49856 [handwritten] / U.S.N.M. [printed]” on red paper; “ Helina / bigoti Malloch [handwritten] / C.J.B. Carvalho det. 198 [printed] 8 [handwritten]” on white paper; “ Helina / flavisquama” handwritten on white paper; “ ♀ ” handwritten on white paper; “M.N.R.J [printed] / 1433 [handwritten]” on white paper, black frame.

Other material examined. ARGENTINA: Chubut: 2 females, PN Los Alerces, -42.672556, -71.864390, 23- XI-1993, Mariluis leg. ( MACN) . CHILE: 4 males, I-1927 ( MACN) ; Región de Bio-Bio: 1 female, Concepción, Parque Botánico Hualpen , -36.8300, -73.0500, II-1970, Cekalovic leg. ( MNRJ) ; Región de los Lagos: 2 females, Osorno, Pucatrihue , -40.563537, -73.284407, 1/ 12-II-1980, Peña leg. ( MACN) .

Distribution ( Fig. 9 C). ARGENTINA: Chubut (new record). CHILE: Región de Bio-Bio (new record), Región de los Lagos, Región Metropolitana.

Remarks. Malloch (1934) described the species from male and female specimens from Ancud, Castro and Puerto Varas, Chile. We provide a redescripton and, for the first time, descriptions of male and female terminalia .

Biology. The specimens captured by JCM were collected over rotten meat with a hand net.

Figures

FIGURE 4. Helina bigoti Malloch. 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 and surstyli, posterior view. G. Cercal plate and surstylus, lateral view (scale bar: 0.1 mm). H. Phallic complex, lateral view (scale bar: 0.1 mm). I – J. Female, apical portion of ovipositor: I. Dorsal view. J. Ventral view (scalebar: 0.5 mm). (Abbreviations: aed apod, aedeagal apodeme; distiph, distiphallus; epiph, epiphallus; epiprct, epiproct; gon, gonopodo; hyprct, hypoproct; 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.)