Regasilus uscovilca Sánchez 2020, sp. nov.
Creators: name: Sánchez, Pável
Publisher: name: Zenodo
Year: 2020
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Diptera
Asilidae
Regasilus
Regasilus uscovilca

description: Regasilus uscovilca sp. nov.
(Figs. 18–19)
Regasilus strigaria: Lamas, 1972: 314 (in part; misidentification).
Diagnosis. As in R. strigarius, this species has red femora, black ventrally, though the hind pair has only 7–8 macrosetae anteroventrally in a single row, and the thorax is dark brown. The scutellar disc is whitish setose, the epandrium is slightly curved downwards, and the phallus is narrow (Fig. 18D).
Description of male holotype. (Figure 18A). Lengths. Body: 15.5 mm; wing: 11 mm.
Head. Antenna black, scape and pedicel black setose, some whitish setae dorsally, scape 1.5 times as long as pedicel; postpedicel similar in length to scape and pedicel together, about 10 times as long as first article of antennal stylus and twice the length of second article; face, frons and vertex golden cinereous tomentose; ocellar setae black, no longer than length of scape and pedicel together; mystacal macrosetae black in the upper face, yellowish bellow; proboscis and labium yellowish setose, palpus mainly black setose, some yellowish setae; postocular macrosetae black above and pale yellowish bellow; occiput golden cinereous tomentose, white setose. Thorax. Brown, mesonotum golden tomentose anteriorly, except the dark paramedial and lateral stripes and the cinereous tomentum that becomes denser towards the posterior area. Chaetotaxy: Pronotum whitish setose with some yellowish macrosetae on antepronotum; postpronotal lobe mostly yellowish setose, with some black setae; mesonotum with black macrosetae, 2 notopleural, 1 supra-alar (alongside with some long setae) and 1 postalar; dorsocentral and acrostichal setae black, short anteriorly and becoming longer and bristly posterior to transverse suture; scutellar disc white setose, 2 apical scutellar black macrosetae; uppermost portion of anepisternum white setose, though some setae are black; katepisternum and anepimeron yellowish setose; katatergite with yellowish macrosetae. Wing. Similar to R. apu sp. nov.; halter yellowish, reddish brown at apex. Leg. Coxae black; femora red, black ventrally; tibiae reddish brown; first tarsomeres concolorous with tibiae, then darkening towards the apex; empodia and claws dark brown; pulvilli yellowish. Chaetotaxy: Coxae and femora whitish setose; femora and tibiae mainly with black macrosetae; mid femur with 5–6 (some red or pale) anteroventral and 3 anterior; hind femur with 4 anterior, 8 anteroventral, 5–6 posteroventral, and dorsally 1 subapical on each side, some macrosetae pale and weak, mainly posteroventrally; fore tibia with 1 basal dorsally, 4 posterodorsal, and 3 posteroventral, quite long; mid tibia with 1–2 anterodorsal, 3 dorsal, 3 posterior, 1–2 posteroventral and 2 anteroventral; hind tibia with 1 dorsal, 2–3 posterodorsal, 2 anterodorsal and 2 anteroventral. Abdomen. Similar to R. strigarius, though cinereous tomentose on sides and posterior margins of tergites, eighth sternite with an apical band of long black macrosetae (some of them white). Terminalia (Fig. 18 B–C). Dark brown; epandrium elongate, slightly curved downwards; black setose dorsally and whitish laterally; hypandrium broad, with long white setae, excision at posterior margin subrectangular (Fig.18F); gonocoxite subtri-angular, apex pointed, with a notch at internal margin and whitish setose on external margin (Fig. 18E); gonostylus curved upwards; phallus narrow, almost straight, ejaculatory apodeme wide in lateral view, very large, reaching anterior area of seventh abdominal segment (Fig. 18D).
Female (Fig. 19A). Similar to male, except terminalia (Figs. 19B); tomentum on pleura and coxae (lost in male holotype) golden anteriorly and cinereous posteriorly; spermathecae coiled and strongly attenuated apically, situated on seventh abdominal segment; common duct very long, about 1.5 times the length of arms of furca; expulsory ducts twice as long as capsular ducts and a quarter the length of common duct (Fig. 19C).
Etymology. A masculine noun in apposition, given to Uscovilca, a prehispanic god of the Chanca culture, which flourished in the current Departments of Huancavelica, Ayacucho and Apurímac in Peru.
Distribution (Fig. 20A). Peru; Departments of Apurímac and Cuzco.
Holotype condition. Good, except for the loss of tomentum on pleura and coxae. Detached terminalia placed in microvial with glycerin and pinned along with the specimen.
Type material. Holotype. Mochoco, 2325 msnm, Aymaraes, Ab[ancay], Apu[rímac], 21.04.[20]03, 14°05’S, 73°10’O Chirimoya D. Farfán / HOLOTYPE Ƌ Regasilus uscovilca Sánchez, 2020 (UNSAAC). Paratypes: Amo-ca, 2410 m, Aym[araes] Apu[rímac] 16.05.03 14°06’S, 73°10’W, W. Cosio L. / PARATYPE ♀ Regasilus uscovilca Sánchez, 2020 (UNSAAC); Misquiyacu, 2785 m, Limatambo [13°28’48”S, 72°26’45”W], An[ta],Cus[co], 13 May 1993, E. Yábar / PARATYPE ♀ Regasilus uscovilca Sánchez, 2020 (UNSAAC); Limatambo, Cuzco, 10.vi.67/ F. Carrasco Z., Cuzco, Perú / Vuelo/ 1012/ Perú / Perú, Carrasco / Regasilus sp.? Det. J.N. Artigas [19]89 / PARA-TYPE ♀ Regasilus uscovilca Sánchez, 2020 (MZUC–UCCC); Limatambo, 30-Abril 1968, Carrasco:Coll / Perú / 1023 / Perú Carrasco / Regasilus sp.? Det. J.N. Artigas [19]89 / PARATYPE ♀ Regasilus uscovilca Sánchez, 2020 (MZUC–UCCC).
description: Published as part of Sánchez, Pável, 2020, Eight new species of Regasilus Curran, 1931 (Diptera: Asilidae: Asilinae) from Peru, pp. 221-246 in Zootaxa 4894 (2) on pages 241-242, DOI: 10.11646/zootaxa.4894.2.3, http://zenodo.org/record/4315667