Entesia lurida Winterton & Irwin 2023, sp. n.
Creators: name: Winterton, Shaun L.
name: Irwin, Michael E.
Publisher: name: Zenodo
Year: 2023
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Diptera
Therevidae
Entesia
Entesia lurida

description: Entesia lurida sp. n.
(Figs 15; 16; 22C; 50)
Zoobank: urn:lsid:zoobank.org:act: 1100A2BC-C66F-4E0C-B2C6-299D052CECC2
Diagnosis. Slender, pale greyish-tan and dark brown species; male with single row of postocular macrosetae, macrosetae absent on occiput; male frons almost contiguous below ocellar tubercle; cervical sclerite with macrosetae absent; wing hyaline to slight smoky infuscate; posterior surface of mid coxa and medial furrow of prosternum with setae absent; scutellum with one pair macrosetae; hind femoral subapical anteroventral seta present; distiphallus short and broad.
Description. Body length. 6.0–8.0 mm (male), 7.8–8.5 mm (female). Head. Frons flat, pubescence greyish tan, admixed with short, pale setae, more extensive in female; male frons width at narrowest point narrower than anterior ocellus but eyes not contiguous; postocular setae pale, male with single row, macrosetae absent on occiput, occiput relatively concave, pubescence grey, setae absent medially; genal setae pale; antenna scape shorter than flagellum, slightly thickened, cylindrical, dark yellow with few small pale setae; flagellum brownish orange, darker distally. Thorax. Scutum greyish-tan with brown suffusion, pair of tan dorsocentral vittae along length, scattered short dark setae, macrosetae brown, chaetotaxy: np, 4; sa, 1; pa, 1; dc, 4; sc, 1; scutellum brownish orange; prosternum without setae in medial furrow; lateral lobe of cervical sclerite lacking macrosetae; pleuron with grey pubescence suffused with orange, admixed with white setae on anepisternum, katepisternum and katatergite; coxae yellow, overlain with silver-grey pubescence, setae and macrosetae mostly pale, macrosetae few in number, mid- and hind coxa without setae on posterior surfaces; legs yellow with uniform short, dark setae and larger macrosetae, hind femur with a single, subapical anteroventral macroseta; wing hyaline, venation dark, costal margin setae arranged in two rows; haltere stem pale with knob mostly brown. Abdomen. Sternite 1 without medial tuft of setae; abdomen dark brown, yellow posteriorly on all tergites, white along posterior margin of tergites 2–5 in male; male abdomen without silver velutum on tergites, elongate setae pale and longer laterally in male, darker on posterior segments and terminalia; tergite 2 with patch of short modified setae posteromedially; terminalia dark yellow, female abdomen mostly dark brown, posterior margin pale, broader laterally. Male terminalia. Epandrium sub-quadrangular, brown medially; macrosetae dark on epandrium and gonocoxites; outer gonocoxite process well developed, narrow; phallus with dorsal apodeme of parameral sheath subtriangular, distiphallus broad, straight and short; ejaculatory apodeme narrow. Female terminalia. As per genus description.
Etymology. The species epithet is an adjective derived from the Latin, luridus —pale yellow, ghostly; referring to the pale yellowish-tan body colour.
Comments. This is a pale, drab species with brown and yellow colouration and markings. It appears to be at least crepuscular, with individuals active after sunset; the body colouration is similar to many other crepuscular and nocturnal fly species.
Type material— Holotype male, ARGENTINA: Salta Province: 4 km W Cafayate [-26.0758, -66.0055], 1760 m, 1.X.2009, M.E. Irwin, hand netted on east side of boulder on steep sandy hillside just after sun had set (MCAN).
Paratypes. ARGENTINA: Salta Province: 20 males, 3 females, same data as holotype, 26.IX.2009, 1–5.X.2009, hand netted, Malaise on steep sandy hillside (MCAN, CSCA).
description: Published as part of Winterton, Shaun L. & Irwin, Michael E., 2023, Revision of the South American stiletto fly genera Entesia Oldroyd and Melanothereva Malloch, with the description of a new genus (Therevidae: Agapophytinae), pp. 1-82 in Zootaxa 5269 (1) on pages 26-29, DOI: 10.11646/zootaxa.5269.1.1, http://zenodo.org/record/7841047