Exechia burundiensis Lindemann, 2021

Lindemann, Jon Peder, Soli, Geir & Kjaerandsen, Jostein, 2021, Revision of the Exechia parva group (Diptera: Mycetophilidae), Biodiversity Data Journal 9, pp. 67134-67134 : 67134

Exechia burundiensis Lindemann sp. n.

Materials

Type status: Holotype. Occurrence: catalogNumber: TSZD-JKJ-107224 ; occurrenceRemarks: BMSA(D): 24977; recordedBy: A.H. Kirk-Spriggs; individualCount: 1; sex: male; lifeStage: adult; preparations: Pinned, with genitalia in glycerine in separate microvial; Location: country: Burundi; stateProvince: Kayanza prov.; municipality: Rwegura; locality: Parc National de la Kibira ; verbatimElevation: 2237 m; decimalLatitude: -2.92194; decimalLongitude: 29.5011; Event: samplingProtocol: Malaise trap; eventDate: 2010-11-24; habitat: Indigenous Afromontane forest; Record Level : institutionCode: BMSA

Description

Adult male: Body length 2.6 mm. Wing length 2.1 mm. Colouration (Dry specimen). Head dark brown; face and clypeus yellow; labellum yellow; palpus yellow, with segments 4-5 yellow to brown. Antenna with scape and pedicel yellow; flagellum brown. Thorax with scutum brown; lateral sclerites pale brown; propleura yellow; halteres whitish-yellow. Legs whitish-yellow. Abdomen dark brown, tergites I-III with slightly paler lateroventral area. Terminalia pale brown. Head. Frons and vertex covered with short pale brown setae. Clypeus covered with only a few (about 11) black setae, mostly on ventral side; flagellomeres quadrate, with sixth flagellomere as long as broad. Thorax. Scutum covered with short pale brown setae. Legs. Fore leg with tibia 0.95 times as long as first tarsomere. Mid-tibia with 16 anterior, 4 posterodorsal, 7 posterior and 2 posteroventral bristles. Hind tibia with 11 anterodorsal, 4 posterodorsal and 3 posterior bristles. Abdomen. Tergites covered with long pale brown to yellow setae. Terminalia (Fig. 16). Each part of divided tergite IX apically with about 6 setae, most apical seta elongate. Gonocoxites with apicoventral margin with 2 setae reaching beyond GL apex (Fig. 16 a, b). GL apex with 3 setae distinctly splaying (Fig. 16 a, b). Aedaegal guides short and acuminate (Fig. 16 a). Hypandrium covered with about 10 setae, apical pair elongate, reaching beyond GL apex (Fig. 16 a, b). Hypandrial lobe with each branch relatively wide, widening somewhat towards the middle, apex narrow, acute (Fig. 16 a, b). Gonostylus with DB (Fig. 16 c) elongate, spathulate, apico-external corner virtually right-angled, apex rounded, forming acute angle pointing apico-interiorly; dorsal side evenly covered with setae, except on apical fourth. VB ovate, apex acute, with 2 setae, most apical seta on apex. IB apically rounded; distal part with 4 apical setae, otherwise bare. MB short, slightly curved interiorly towards rounded apex, with 3 setae, 2 most apical setae very small, close to apex, basal seta one third from apex.

Female: Unknown.

Diagnosis

Distinguished from all species in the E. parva group in having the gonocoxal lobe with apical setae distinctly splaying (Fig. 16 a, b), the internal gonostylus branch with 4 setae close to the apex (Fig. 16 c), by the shape of the hypandrial lobe (Fig. 16 a) and the dorsal gonostylus branch (Fig. 16 c).

Etymology

From Burundi , the country where the holotype was collected, with Latin ending - ensis, belonging to.

Distribution

Afrotropical, Burundi (Fig. 4 ).

Biology

Adult collected in afromontane forest (2237 m a.s.l.).

Figures

Figure 4. Distribution map of species in the E. parva group occurring in the Afrotropical Region, based on localities from studied material, type material and DNA barcoded material. Different species are represented by individual colours. Altitudes are indicated in shades from grey (lowland) to white (mountains).