Buestanmyia chiriboga Gonzalez 2021, sp. nov.
Creators: name: González, Christian R.
Publisher: name: Zenodo
Year: 2021
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Diptera
Tabanidae
Buestanmyia
Buestanmyia chiriboga

description: Buestanmyia chiriboga González sp. nov.
(Figs. 1a–h, 2a–e)
Type locality: Ecuador, Pichincha Province, 27 km Quito-Chiriboga to San Juan, 3200 m.
Diagnosis. Length 11.0 mm. Body color dark-brown (Fig. 1a, 1b). Eyes with very short and scarce ommatrichia. Frons moderately wide and slightly divergent below (index 2.2) (Fig. 1c). Basal callus subquadrate with median dorsal projection equal to about half the height of the frons (Fig. 1c). Ocellar triangle and ocelli absent. Beard with long yellowish hairs (Fig. 1d). First flagellomere angulate (Fig. 1e). Maxillary palpus stout with abundant and long black and brownish hairs. Mesonotum dark brown. Wings (Fig. 1g) slightly smoky; vein R 4 with a short appendix. Abdomen brownish dorsally, distal margin of tergites lighter, tergites 2–7.
Description (Holotype ♀)
Female. Head. Length 11.0 mm, wing length 11.5 mm. Eyes dark-brown, with very short and scarce ommatrichia. Frons moderately wide and slightly divergent below, with brownish pruinescence, and with short brownish hairs, frontal index 2.2 (Fig. 1c). Vertex with brownish pruinescence, and short black hairs. Basal callus light brown, subquadrate with median dorsal projection reaching half the height of the frons, touching subcallus, not touching eyes (Fig. 1c). Ocellar triangle and ocelli absent. Subcallus covered with brownish pruinescence, and with short black hairs laterally. Gena with brownish pruinescence, and with long brownish hairs. Clypeus with grayish pruinescence, and with long yellowish hairs, medially without hairs, laterally with a few short black hairs. Beard with long yellowish hairs (Fig. 1d). Scape of antenna brownish, with long and erect black hairs, pedicel concolorous, bearing short hairs, without dorsal projection. First flagellomere brown, darker apically, with an obtuse angle, apical flagellomeres darker short and thickened (Fig. 1e). Maxillary palpus with yellowish pruinescence, stout, first segment yellowish gray with long black and grayish hairs; second segment triple the length of the first, somewhat tapered and relatively flat distally, and with long and abundant black and brownish hairs (Fig. 1f), inner side without hairs. Proboscis dark brown with yellowish-black hairs, labellum large and fleshy (Fig. 1f). Occiput with brown pruinescence and black hairs on dorsal edge. Thorax. Mesonotum with dark-brown integument, bearing scarce yellowish-brown hairs. Postpronotal lobes light brown, with long blackish hairs. Scutellum dark brown, with long hairs laterally and shorter on the disc. Pleura coated with brownish pruinescence, with long gray hairs; anepisternum with long black hairs; katepisternum and katatergite with long yellowish hairs. Legs brown, coxae with long grayish hairs, femora with long gray and black hairs; tibiae lighter and with shorter black hairs; remaining leg segments with short black hairs. Wings slightly smoky and more brownish on the cells costal and subcostal, cell r 5 widely open; veins Sc and R 1 with short black hairs; vein R 4 with a short appendix (Fig. 1g). Basicosta bare. Halter brown, apex whitish. Squamae concolorous with wing base. Upper calypter yellowish, lower calypter lighter. Abdomen. Dark brown dorsally, distal margin of tergites lighter, tergites 2–7 with grayish hairs and long black and grayish hairs laterally. Sternites pale brown, with long grayish and black hairs. Terminalia (Fig. 1h). Cerci darkly sclerotized, subovoid. Tergite 10 ovoid, medially divided; tergites 9 darkly sclerotized, widely divided. Hypoginal valve with distal border slightly projecting and long hairs. Hypogynium with straight, wide base and long hairs. Genital fork with narrow base, neck wide basally and a long spine present on comb. Three spermathecal ducts, extended from darkly sclerotized genital fork, caudal end of spermathecal ducts with cup-like expansions.
Male. Length 10.0 mm, wing length 11.0 mm (Fig. 2a). Similar to female except as follows: eyes holoptic with more abundant and longer ommatrichia (Fig. 2b). Frons darker. Genae darker than the female with longer black hairs. Scape and pedicel with very long and abundant hairs. Maxillary palpus short, semicircular and abundant hairs (Fig. 2c). Postpronotal lobe dark brown. Wings smokier than in the female and with clouds on the crossveins (Fig. 2d). Tibiae with longer hairs. Terminalia (Fig. 2e). Dorsal view: cerci darkly sclerotised and acuminate and with long hairs; tergite 9 posteriorly undivided, apically elongated and tapered. Gonocoxae, gonostyli and aedeagus as figure 2e.
Distribution. This species is known only from the type locality in the western Andes of Ecuador.
Type material. Holotype ♀ (QCAZ), ECUADOR, Pichincha Province, 27 km Quito – Chiriboga to San Juan, 3200 m, 16.06.1977, W. Schacht. Paratype ♂ (UMCE): Pichincha Province: same as holotype.
Immature stages: unknown.
Etymology. The specific name is a noun in apposition taken from the type locality.
description: Published as part of González, Christian R., 2021, Buestanmyia chiriboga gen. nov. et sp. nov. (Diptera: Tabanidae: Diachlorini) from the Ecuadorian Andes, pp. 184-190 in Zootaxa 4949 (1) on pages 185-188, DOI: 10.11646/zootaxa.4949.1.11, http://zenodo.org/record/4635700