Holops grezi, Barahona-Segovia & Guzmán & Pañinao-Monsálvez, 2021

Barahona-Segovia, Rodrigo M., Guzmán, Vicente Valdés & Pañinao-Monsálvez, Laura, 2021, Review of Chilean Cyrtinae (Diptera: Acroceridae) with the Description of Three New Species and the First Record of Villalus inanis from Argentina, Zoological Studies 60 (35), pp. 1-18 : 7-8

Holops grezi sp. nov. Barahona-Segovia

( Figs. 9–10 , 18 ) urn:lsid:zoobank.org:act:0DD291B6-7C65-44F8-9BC4-7E590B10F3FE

Material examined: Holotype: male, in regular condition (see notes below), found in the Ernesto Krahmer’s collection from UACH and finally deposited in the MNHNCL; with the following labels: “Col. 2.ii.1983 / Conguillio / Leg. E. Krahmer ”; “Holotypus / Holops grezi / sp. nov. ³ / det. Barahona-Segovia 2019 ” [red].

Type locality: Cautín province, Conguillio National Park, La Araucanía region, Chile.

Etymology: specific epithet ‘ grezi ’ refers to Audrey A. Grez Villarroel, a recognized Chilean entomologist, member of Ecology Society of Chile and full professor at the University of Chile. Audrey Grez has significantly contributed to the knowledge of both native and exotic ladybugs species and their impact on the composition and function of the native species in the agricultural landscape. In addition, she has contributed to the study of native beetles in the fragmented landscape, specifically in Maulino forest, where she has driven several theses both undergraduate as well as postgrad students.

Diagnosis: shiny dark greenish species. Head and eyes black. Flagellum 2-fold longer than scape and pedicelum together. Scutum, thoracic segments and abdomen are shiny dark green with brown pilosity. Coxa, trochanter and femora brownish. Tibia and tarsi light brownish. Wings smoked. Cell r 4+5 elongated and thin. Cell m 3 with conic shape and directly connected cell bm. Abdomen globose in dorsal view and slightly wider that maximum margins of thorax.

Description: female: Length: 6.2 mm; width: 2.1 mm (head), 3.1 mm (thorax) and 4.5 mm (abdomen); wing: 7.3 mm; head: the size is 3/4 of the maximum height of the thorax ( Fig. 7 ); antenna inserted in the middle of the head; scape and pedicelum blackish with similar size; flagellum styliform two times longer than pedicelum and scape together; antennae shorter than head length; eyes with long and brown ommatrichia; apparently two ocelli dark bluish with ocellar triangle bluish and some protuberant; occiput shiny blue with long black pilosity; mouth parts yellow; thorax: shiny blue-blackish scutum with long, dense and black pilosity, sparse but uniformly distributed ( Figs. 9–10 ); postocellar lobe shiny blue with long and black pilosity; anterior spiracle light yellow; proepimeron, anepisternum, katepisternum, meron, katatergite, katepimeron and anatergite dark blue with long and black-brownish pilosity ( Fig. 10 ); subalar sclerite brownish without pilosity; scutellum shiny blue, some collapsed due to manage of the pin; legs: coxa, trochanters and femora dark brownish, and tibiae and tarsi are light brownish, both covered with long and brown-yellowish pilosity, especially in the femora ( Fig. 10 ); tarsi have dense pilosity ( Fig. 10 ); black claws; wings: smoky and membranous appearance; all veins dark brown; R 1 and R 2+3 are closer among them ( Fig. 18 ); R 4 slightly petiolated; R 5 straight; R 4 and R 5 in the distal part are separated for 1/3 of length of each vein; M 1, M 2 and M 3+4 not reaching the wing margin ( Fig. 18 ); M 1 and M 2 are similar in size; cell r 4+5 elongated, with five sides and thin, with 3/4 length of R 2+3 vein; cell m 3 with conic shape and 1/3 length of r 4+5 connected to cell bm directly ( Fig. 18 ); halters bicolor with stem light yellow and knob brownish; calypter rim blackish and interior part is brownish with dense and long brownish pilosity; abdomen: blackish, globose and similar in size at thorax ( Fig. 9 ); fully rough with brownish pilosity; all tergites blackish with some blue-green tints; tergites 1–5 with same width and tergite 6 greatly reduced; all with long and yellow-brownish pilosity; all sclerite with greenish color; genitalia: not detached; cerci barely visible and covered with yellow and short pilosity.

Distribution: only known from the type locality ( Fig. 27 ).

Remarks: endemic species that belongs to Pehuén district in the Maule province, subantarctic subregion ( Morrone 2015). This area is characterized by the presence of Araucaria araucana and Nothofagus species, forming forests with high structural complexity. The host is unknown.

Curatorial note: thorax somewhat collapsed and abdomen something separated due to the pin management by collector.

Figures

Figs. 9–12. Holops grezi sp. nov.: (9) dorsal view and (10) lateral view; Holops pullomen sp. nov.: (11) dorsal view and (12) lateral view. Scale bars = 1 mm.

Figs. 15–20. Holops wing details: (15) H. anarayae sp. nov.; (16) H. cyanea (Philippi); (17) H. frauenfeldi Schiner; (18) H. grezi sp. nov.; (19) H. pullomen sp. nov., and (20) H. virens.

Figs. 5–8. Holops frauenfeldi Schiner, 1868: (5) resting in a shrub branch in Rio Clarillo National Reserve. Photographed by Vicente Valdés Guzmán; (6) dorsal view and (7) lateral view. Photographed by Rodrigo Barahona-Segovia, and (8) individual with golden pilosity resting in a branch in Viña del Mar. Photographed by Gabriela Germain Fonck. Scale bars = 1 mm.

Fig. 27. Distributional map of Holops species.