Eupyrgota nyambene, Korneyev, 2014

Korneyev, V. A., 2014, Pyrgotid Flies Assigned To Apyrgota. I. New Species And Synonyms In Eupyrgota (S. Str.) (Diptera, Pyrgotidae), With The Description Of A New Subgenus, Vestnik Zoologii 48 (2), pp. 111-128 : 121-124

Eupyrgota nyambene V. Korneyev, sp. n. ( fig. 6 )

M a t e r i a l. Type. Holotype ♀: “ Kenya: Eastern Province, Nyambene Hills, Itieni Forest , at bottom, 2142 m, 0.24433° N, 37.87016° E ”, “ Malaise trap, edge of indigenous forest ”, 26.06– 10.07.2011 (R. Copeland) “14481 PyrgotidH11” ( NMKE).

D i a g n o s i s. This species is distinguished from all other species of Eupyrgota by the combination of its large size, bicoloured brown-yellow body and wing, well-developed facial carina, parafacial shining, narrow, half as wide as eye horizontal diameter, eye vertical diameter more than 3 times (3.7×) as high as gena, moderately narrow legs and petiolate abdomen, slightly wrinkled fronto-orbital plate and parafacial, 3 pairs of scutellar setae, and presence of small femoral organ in female. See the key in the remarks below for differences from related species.

D e s c r i p t i o n. Head ( fig. 6 , 2–5 ) brown, with partly yellow vertex, face and occiput; frons 1.35× (at vertex) and 1.7× as wide as eye (at lunule level), conspicuously broadened anteriorly; eye oval (eye ratio 0.55); genal-eye ratio 0.27; antenna dark brown to black; first flagellomere-pedicel ratio 1.25; medial vertical seta 0.2× as long as vertical diameter of eye; lateral vertical seta non-distinguishable from postocular setulae; postocellar, three ocellar and orbital setae 0.6–0.8× as long as medial vertical seta. Fronto-orbital plates and parafacial shining, yellowish brown to dark brown, with sparse shallow wrinkles and pits ( fig. 2, 2 ). Antennal groove brownish yellow, with dark brown ventral margin. Gena dark brown. Epistoma black, 0.17× as high as facial carina. Supracervical area with dark brown spot. Palp as long as flagellomere 1; 3× as long as wide, black at base, dark yellow, moderately short black setulose and gray microtrichose on the rest.

Thorax dark yellow, largely gray microtrichose and black setulose, with brown antepronotum, supra-alar vitta and prescutellar area on mesonotal scutum, katepisternum, meron, and anatergite; 1–2 postpronotal, 0 + 2 supra-alar, 1 intra-alar, 2 postalar, 1 dorsocentral, and 0 prescutellar acrostichal setae; proepisternal ridge with 30–35 moderately long setae; anepistenum, anepimeron, and katepisternum each with one long black seta and numerous (10–20) additional long setulae 0.6–0.8× as long as seta; scutellum with 2 strong setae on its right and 3 strong setae on its left side 1.2–1.4× as long as scutellum, plus 2–3 slightly thinner setae between and anterior of them; mesonotum length 3.6 mm.

Wing ( fig. 6 , 8 ) yellow, with diffuse brown spots in anteroapical corner and around crossvein r-m, with partly hyaline cells bm and cup, anal cells, and alula. Wing length 17.0 mm.

Coxae and trochanters with moderately thickened setulae, fore and hind coxae dark brown, mid coxa lighter; fore trochanter with hooked setulae. Femora brown, short setulose, with moderately short dorsal setae; fore femur ( fig. 6, 6 ) narrow, 4.2× as long as wide, slightly wrinkled, short setulose, with 9–10 short suberect setae on dorsal side; mid femur ( fig. 6 , 7 ) in female with narrow oval femoral organ 0.4× as wide as femur and 6 times as long as wide; tibiae and tarsi brown, black setulose, neither conspicuously curved, nor thickened.

Abdomen dark brown, black setulose; syntergite 1 + 2 with П-shaped pale yellow and bare mark at base of tergite 2, moderately narrowed, 2.8× as long as wide at middle and 1.31× as long as wide at posterior margin in female, 1.6× as long as tergites 3–6 in female; synsternite 1 + 2 pale yellow, except base and apex dark brown, 4× as long as wide at posterior margin in female; sternites 3–6 dark brown, subrectangular, with moderately short and sparse setulae; pleura mostly brown ( fig. 6 , 9).

Female terminalia: oviscape subshining yellowish brown to dark brown, robust, 0.75× as long as preabdominal tergites combined and slightly wider than long on ventral side; apicoventrally with pair of soft lobes, densely covered by trichoid sensilla and closing oviscape aperture at rest; pair of strong black apically rounded, wide and relatively thin hooks; ventral surface of oviscape anterior to hooks broadly desclerotized, with rather narrow stripes bearing 14–16 reddish yellow setulae in 3–4 rows on basal portion and numerous trichoid sensillae apically; aculeus and spermathecae not examined (specimen not dissected).

E t y m o l o g y. The species is named for its type locality. It is a noun in apposition.

R e m a r k s. In the key to Afrotropical Eupyrgota species ( Korneyev, 2006 b), this species runs to couplet 8, which must be modified as follows:

8. Fore- and hindfemur thickened, in female with strong appressed setae dorsally; midfemur with femoral organ well developed. Frons at anterior margin wide, 0.55–0.65 times as wide as head. Flagellomere 1 slightly longer than pedicel and less than half as wide as parafacial. Oviscape with thickened black setae anterior to hooks (similar to those in E. latipennis ). Democratic Republic of Congo. ......................................................... ................................................................................................................................. E. crassipes V. Korneyev, 2006

— Fore- and hindfemur narrow, without enlarged setae on dorsal side; midfemur with or without femoral organ. Frons at anterior margin narrower, 0.4–0.5 times as wide as head. Other characters variable...... 8 a

8 a. Larger species: wing longer than 14 mm, yellow with two brown areas. Scutellum, anepisternum, anepimeron and katepisternum with additional long setulae almost as long as regular setae. Midfemur of female with small femoral organ. Kenya. ........................................................................................... E. nyambene sp. n.

— Smaller species: wing shorter than 13 mm (7–12), widely brown along whole anterior margin. Scutellum, anepisternum, anepimeron and katepisternum at most with short setulae less than half as long as regular setae. Midfemur without femoral organ. ... melancholica subgroup. .............................................................. 9

Figures

Fig. 6. Eupyrgota nyambene, sp. n., holotype ♀ (NMKE): 1 — habitus, left; 2–5 — head (2 — anterior left; 3 — anterior; 4 — left; 5 — dorsal); 6 — fore femur, posterior view; 7 — mid femur, anterior; 8 — wing; 9 — abdomen, ventral. Рис. 6. Eupyrgota nyambene, sp. n., голотип ♀ (NMKE): 1 — общий вид, слева; 2–5 — голова (2 — спереди слева;3 — спереди; 4 — слева;5 — дорсально); 6 — переднее бедро,вид сзади;7 — среднее бедро, спереди; 8 — крыло; 9 — брюшко, вентрально.

Fig.2. Eupyrgota alienata, holotype ♀ (BMNH) (1–2) and non-type ♀ (NHMB) (3–6): 1 — habitus, dorsal; 2 — labels; 3–4 — head (3 — left; 4 — anterior); 5 — wing; 6 — fore coxa. Рис. 2. Eupyrgota alienata, голотип ♀ (BMNH) (1–2) и нетиповая ♀ (NHMB) (3–6): 1 — общий вид, дорсально; 2 — этикетки; 3–4 — голова (3 — слева; 4 — спереди); 5 — крыло; 6 — передний тазик.

Fig. 3. Eupyrgota angustifrons, holotype ♀ (BMNH): 1 — habitus, left; 2 — labels; 3–5 — head (3 — left; 4 — anterior; 5 — dorsal); 6 — wing; 7 — mid femur and tibia, anterior; 8 — abdomen, left. Рис. 3. Eupyrgota angustifrons, голотип ♀ (BMNH): 1 — общий вид, слева; 2 — этикетки; 3–5 — голова (3 — слева;4 — спереди;5 — дорсально); 6 — крыло; 7 — среднее бедро и голень, спереди;8 — брюшко,слева.

Fig. 4. Eupyrgota armipes, holotype ♀ (BMNH): 1 — habitus, left; 2 — labels; 3–5 — head (3 — left; 4 — anterior; 5 — dorsal); 6 — fore femur and tibia, posterior view; 7 — mid femur, anterior view; 8 — fore trochanter; 9 — mid trochanter; 10 — wing; 11 — mesonotum and abdomen, dorsally; 12 — abdomen, posterior.

Fig. 5. Eupyrgota brahma, holotype ♀ Adapsilia brahma (BMNH) (1–2) and holotype ♀ Adapsilia nocturna (BMNH) (3–9): 1, 3 — habitus, dorsal; 5 — same, left; 2, 4 — labels; 6–7 — head (3 — anterior left view; 4 — dorsal); 8 — wing; 9 — abdomen, dorsally. Рис. 5. Eupyrgota brahma, голотип ♀ Adapsilia brahma (BMNH) (1–2) и голотип ♀ Adapsilia nocturna (BMNH) (3–9): 1, 3 — общий вид, дорсально; 5 — same, слева; 2, 4 — этикетки; 6–7 — голова (3 — спереди слева view; 4 — дорсально); 8 — крыло; 9 — брюшко,дорсально.

Fig. 8. Eupyrgota flaviseta, holotype ♀ (1–6), paratypes ♀ (7–9) and} (10–14) (USNM): 1 — habitus, left; 2 — labels; 3–4 — head (3 — left; 4 — dorsal); 5 — fore femur and tibia, posterior view; 6 — mid femur, anterior view; 7 — epandrium, right; 8–9 — phallus glans, right and ventral; 10 — abdomen, dorsal; 11 — same, ventral, macerated in KOH; 12 — oviscape apex, ventrally; 13 — aculeus, ventral; 14 — spermathecae.

Fig. 7. Eupyrgota vespiformis, ♀ (NMKE): 1 — habitus, left; 2–4 — head (2 — anterior left; 3 — left anterior; 4 — dorsal); 5 — wing; 6–7 — abdomen (6 — left; 7— dorsal).