Regasilus illapa, Sánchez, 2020

Sánchez, Pável, 2020, Eight new species of Regasilus Curran, 1931 (Diptera: Asilidae: Asilinae) from Peru, Zootaxa 4894 (2), pp. 221-246 : 234-236

publication ID

https://doi.org/ 10.11646/zootaxa.4894.2.3

publication LSID

lsid:zoobank.org:pub:0445D812-2DA7-4BAE-97AC-BD91F74BE4AF

DOI

https://doi.org/10.5281/zenodo.4327241

persistent identifier

https://treatment.plazi.org/id/03AA87F0-2C1E-DF18-FF09-83F1661CFE0B

treatment provided by

Plazi

scientific name

Regasilus illapa
status

sp. nov.

Regasilus illapa View in CoL sp. nov.

( Figs. 12–13 View FIGURE 12 View FIGURE 13 )

Diagnosis. Legs and thorax reddish brown, tomentum predominantly cinereous, almost silvery, giving to this species a whitish appearance. Male terminalia shining brownish; epandrium thin, its apex pointing down ( Fig. 12B View FIGURE 12 ); phallus narrow, and ejaculatory apodeme quite large ( Fig. 12D View FIGURE 12 ).

Description of male holotype. ( Fig. 12A View FIGURE 12 ). Lengths. Body: 15 mm; wing: 9 mm.

Head. Antenna dark brown, scape and pedicel black setose, though some whitish setae are present dorsally; postpedicel similar in length to scape and pedicel together, about 10 times as long as first article of antennal stylus and about 1.3 times the length of second article; face, frons and vertex cinereous tomentose; ocellar setae black, no longer than length of scape and pedicel together; mystacal macrosetae black in the upper face and pale yellowish bellow; proboscis, labium and palpus whitish setose; postocular macrosetae black above, pale yellowish bellow; occiput cinereous tomentose, white setose. Thorax. Dark brown, fully covered with cinereous tomentum, except for the dark paramedial and lateral stripes on mesonotum. Chaetotaxy: Pronotum yellowish setose with some pale and weak macrosetae on antepronotum; postpronotal lobe whitish setose; mesonotum with black macrosetae, 2 notopleural, 1 supra-alar (alongside with a few short setae) and 1 postalar; dorsocentral and acrostichal setae black, short anteriorly and becoming longer posterior to transverse suture; scutellar disc white setose, 2 apical scutellar black macrosetae; uppermost portion of anepisternum and katepisternum whitish setose; katatergal macrosetae pale yellowish. Wing. Similar to R. apu sp. nov., halter yellowish. Leg. Coxae black, cinereous tomentose; femora mainly brownish, base reddish brown, concolorous with tibiae and tarsi, though these become darker at apex; empodia and claws dark brown, pulvilli yellowish. Chaetotaxy: Coxae and femora whitish setose; femora mainly with white macrosetae, some on tibiae; mid femur with 5–6 anteroventral and 3 anterior; hind femur with 3–4 anterior, 10–12 anteroventral, 5–6 posteroventral, most of them pale and weak, and dorsally 1 subapical on each side; fore tibia with 1 dorsal, basal, 4 posterodorsal, and 3 posteroventral, quite long; mid tibia with 1 anterodorsal, 2 dorsal, 3 posterior, 1–2 posteroventral and 2 anteroventral; hind tibia with 1 dorsal, 2 anterodorsal, 3 posterodorsal and 2 anteroventral. Abdomen. Dark brown, subshining, cinereous tomentose on sides and extending to posterior margins of tergites, white setose, setae longer laterally; sternites fully cinereous tomentose and white setose, except sternite 8, with an apical band of long black macrosetae. Terminalia ( Figs. 12 View FIGURE 12 B–C). Shining brown; epandrium elongate and thin, with a pointing-down apex, black long setae on base and whitish towards apex, with conspicuous spiny macrosetae on posterior margin present; hypandrium broad, long white setose, excision at posterior margin cuplike ( Fig. 12F View FIGURE 12 ); gonocoxite subtriangular with irregular apex and white long setae on external margin ( Fig. 12E View FIGURE 12 ); gonostylus curved upwards, usually visible in lateral view; phallus narrow, almost straight, the ejaculatory apodeme wide in lateral view, quite large, reaching the seventh segment ( Fig. 12D View FIGURE 12 ).

Female ( Fig. 13A View FIGURE 13 ). Similar to male, except terminalia ( Fig. 13B View FIGURE 13 ); spermathecae situated almost at base of seventh abdominal segment, strongly attenuated and coiled apically; common duct almost as long as arms of furca; expulsory ducts about 0.75 times the length of capsular ducts and a third the length of common duct ( Fig. 13C View FIGURE 13 ).

Etymology. A masculine noun in apposition, given to Illapa, the Inca god of thunder and rain, specially revered by people in times of drought.

Distribution ( Fig. 20B View FIGURE 20 ). Peru; Tayacaja, province in the Department of Huancavelica.

Holotype condition. Good. Detached terminalia placed in microvial with glycerin and pinned along with the specimen. As well as detached right wing.

Type material. Holotype. PERU, HV [Huancavelica], Tayacaja, Colcabamba , 1614 m 12°17’19”S, 74°41’16.2”O 02.ii.2014 F. Meza GoogleMaps / HOLOTYPE Ƌ Regasilus illapa Sánchez, 2020 ( MUSM) . Paratypes: Same data as holotype (3 Ƌ, 1 ♀) ; PERU, HV, Tayacaja Colcabamba CP Ranra, 2647 m, 12°19’8.1”S, 74°44’22.5”O, 17.vi.2019 E. Medina leg. GoogleMaps / PARATYPE ♀ Regasilus illapa Sánchez, 2020 ( MUSM) .

Kingdom

Animalia

Phylum

Arthropoda

Class

Insecta

Order

Diptera

Family

Asilidae

Genus

Regasilus

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