Cyrtosathe gen. n.: the first non­scenopinine window fly from sub­ Saharan Africa (Diptera: Scenopinidae) Author Winterton, Shaun L. Author Metz, Mark A. text Zootaxa 2005 975 1 12 journal article 10.5281/zenodo.171327 f27a15be-7b4a-442a-a141-ad361f119be0 1175­5326 171327 Cyrtosathe kirkspriggsi Winterton & Metz gen. et sp. nov. ( Figs 1–4 ) Type species. Cyrtosathe kirkspriggsi sp. nov. by present designation. Etymology. Cyrtosathe is derived from the Greek, cyrto , bent; sathe penis. The specific epithet is named in honour of Ashley Kirk­Spriggs, the collector of the type series. Type material: Holotype male, NAMIBIA : Luderitz District, Ob[i]b Waters, pitfall trap ( 28°00’08”S , 16°36’46”), 10–26.viii.1998 , Kirk­Spriggs & Marais (MEI#119440) ( NMNW ). Paratypes , NAMIBIA : 2 males , 1 female , same data as holotype (MEI#119434, 119442, 119465) ( USNM ); male, Obib Waters, Malaise trap ( 28°00’08”S , 16°38’46”) 25– 26.viii.1998 , Kirk­Spriggs & Marais (MEI# 112932 ) ( USNM ); 6 males , 1 female , Luderitz District, 8 km W Rosh Pinah, pitfall trap ( 27°59’28”S , 16° 39í14 ”) 20–26.viii.1998 , Kirk­ Spriggs & Marais (MEI#119436, 119438, 119441, 119445–6, 119451, 119453) ( NMNW ); 1 male , 1 female , Luderitz District, 8 km W Rosh Pinah, Malaise trap ( 27°59’28”S , 16°39’14”) 20–26.viii.1998 , Kirk­Spriggs & Marais (MEI#119448, 119454) ( MEIC / CASC ). Diagnosis . Autapomorphic characters: Female tergite 8 covered with erect, elongate setae arranged in a ring pattern (i.e. glabrous centre); hypandrium bowl­like with posterior processes; dorsal apodeme of parameral sheath enlarged into a ‘ladle’­like structure enclosing ejaculatory apodeme; aedeagus folded onto itself posteriorly such that the ejaculatory apodeme is directed posteriorly. Shared characters with other genera: head and thorax mostly glabrous; costal vein ending just past R5; wing vein M2 present; hind coxal knob absent; abdominal tergite 2 sensory patch present as two hemispheres, sensory setae with apices acute (not truncated); male epandrium divided medially; hypandrium separate from gonocoxites; gonocoxal apodeme slightly longer than gonocoxites; distiphallus bifid, greatly elongate and narrow; ventral apodeme of parameral sheath absent. Description . Body length: 2.0–2.5 mm. Head . Spherical, glossy dark brown to black; frons glabrous, narrow in male ( Figs 1 A, B) with eyes contiguous along middle third, female ( Figs 1 C, D) frons much wider than ocellar tubercle along entire length; male eyes with facets larger in upper half; ocellar tubercle raised, ocelli red­brown; occiput flat to slightly concave laterally; postocular ridge with irregular rows of minute postocular setae; gena with short setae; mouthparts brown, relatively elongate, approximately equal in length to antennae; labellum relatively small and rounded; antenna ( Fig. 1 E) brown, overlain with fine silver pruinescence; scape and pedicel short, broad; flagellum 2x length of pedicel, flattened, apex pointed; style apical, single segment. Thorax . Glossy black, glabrous except for fine, pale setae on katepisternum and short dark setae on proepimeron and scutellum; macrosetae absent; wing ( Fig. 2 ) hyaline, venation pale, venation in posterior half of wing poorly sclerotised and difficult to detect; costal vein ending at R5 vein; vein M2 present, extending from middle of discal cell; haltere stem brown, knob pale cream­white; legs dark brown to black, tibiae pale yellow, covered with fine pale setae. FIGURE 1 . Cyrtosathe kirkspriggsi gen. et sp. nov.: Male: A, head, lateral; B, same anterior. Female: C, head lateral; D, same anterior; E, antenna, right lateral. F, abdominal tergite 2 sensory setae patch (enlarged at right). Scale lines: 0.1 mm. FIGURE 2. Cyrtosathe kirkspriggsi gen. et sp. nov.: Wing. Scale line: 0.2 mm. Abdomen . Glossy black, sparsely covered with elongate, pale setae in male; tergite 2 with two medial hemispherical patches of sensory setae ( Fig. 1 F). Male Genitalia . Genitalia aligned with body axis (i.e. epandrium dorsal), not rotated; epandrium ( Figs 3 A, C) quadrangular, arched, covering terminalia, split medially in two sections; cerci short, rounded; gonocoxites ( Figs 3 B–C, E–F) elongate with spatulate posterior process and a short, strong seta dorsally; gonocoxites widely separated medially by a large rounded bowl­like hypandrium; hypandrium with paired posterior processes and medial process ( Figs 3 B–C, E–F); gonostylus elongate, narrow, apical third upturned slightly; gonocoxal apodeme elongate, equal to gonocoxite in length, curved outwards then recurved inwards at apex around dorsal apodeme of parameral sheath, apex spatulate; aedeagus extended anteriorly beyond gonocoxites, folded dorsally on itself, distiphallus bifid, greatly narrowed, elongate, slightly coiled, ribbon­like lateral flanges near base; dorsal apodeme of parameral sheath large, ‘ladle’­shaped with lateral wings at base, cradling ejaculatory apodeme ( Figs 3 B–E); lateral ejaculatory apodemes not clearly evident; ejaculatory apodeme narrow with greatly enlarged paddle­shaped apex posteriorly. Female Genitalia . Tergite 8 covered with erect, elongate pale setae arranged in a ringlike pattern (i.e. glabrous in the centre) ( Fig. 4 A); tergite 9+10 joined to furca internally by a bridge formed by tergite 9 ( Figs 4 B–C); acanthophorites with four to six stout A1 setae; furca ( Fig. 4 C) circular, lightly sclerotised; sternite 8 bowl shaped; two spermathecae present; spermathecal ducts thickened basally, narrower distally, with reticulated tissue patterning; spermatheca membranous, truncated distally with thickened marginal band; spermathecal sac very small; spermathecae join to roof of bursa separately from and immediately posterior of spermathecal sac duct; accessory glands join to bursa just posterior to spermathecae. FIGURE 3. Cyrtosathe kirkspriggsi gen. et sp. nov.: Male genitalia: A. Epandrium, dorsal; B, aedeagus and gonocoxites (epandrium and vestiture removed), dorso­lateral view; C, same, lateral; D, detail of basal portion of aedeagus, lateral; E, aedeagus and gonocoxites, dorsal; F, detail of gonocoxites. lateral, Scale line: 0.1 mm. Abbreviations: c , cercus; d , distiphallus; da , dorsal apodeme of parameral sheath; e , epandrium; ea , ejaculatory apodeme; g , gonocoxite; ga , gonocoxal apodeme; gs , gonostylus; h , hypandrium; hy , hypoproct. Comments . Cyrtosathe kirkspriggsi gen. et sp. nov. is known from a single collecting locality in the Luderitz District, Namibia . All adults were collected by Malaise and pitfall traps. As with all other non­scenopinine window flies, the immature stages are unknown. The type series is only in fair condition as most specimens are shriveled, presumably when they were removed from alcohol and mounted.