Pyrgotomyia stuckenbergi, Korneyev, 2012

Korneyev, V. A., 2012, Revision of the genus Pyrgotomyia Hendel (Diptera: Pyrgotidae), African Invertebrates 53 (1), pp. 187-187 : 201-202

Pyrgotomyia stuckenbergi sp. n.

Figs 5, 9 , 15 , 19 , 38–40, 45, 53

Etymology: Named for Brian Stuckenberg, in recognition of his great contribution to the study of Afrotropical Diptera .

Description:

Female ( Fig. 53 ). Generally similar to P. callosa , differing as follows.

Head: Length:height:width = 1.0:0.9:1.1; pale orange-yellow, except frons broadly brown, occiput with brown transverse mark in its dorsal portion and flagellomere 1 at apex brown. Frons subshining brown (only anterior margin, narrow median vitta, vertical plates and area corresponding to ocellar triangle yellow), 2.7× as long as wide in its narrowest part; with 1 short proclinate orbital seta and 8–12 setulae at each side 1–1.5× as long as orbital seta, forming 2 irregular transverse rows on its anterior portion. Parafacial and subocular sclerite entirely shining yellow, without brown areas. Face twice as high as wide; supraclypeal sclerite ( Fig. 5 ) 0.8× as high as wide. Eye 1.24× as high as long and 4.5× as high as gena. Ocellar triangle not defined, ocellar seta either broken off or lacking; postocellar seta present, 0.25× as long as medial vertical seta; lateral vertical seta absent.Antenna with flagellomere 1 apically blunt, brown in apical one-third.

Thorax: Shining orange-yellow, mesonotum ( Fig. 9 ) with pair of reddish brown vittae on both presutural and postsutural part of scutum lateral to dorsocentral setae; anepisternum with wide brownish yellow vertical spot; postpronotal lobe pale brownish; katatergite, anatergite, mediotergite and postscutellum brown; setae and setulae black or brown. Postpronotal seta present on left side only. One strong presutural (scapular) dorsocentral and one postsutural dorsocentral seta slightly posterior to level of supra-alar seta; other dorsocentral setulae fine, at most half as long as setae.

Wing ( Fig. 15 ): Length 5.4 mm. Distance between wing base and apex of vein R 1 2.8 mm.

Abdomen: Abdominal sternites as in Fig.19 ; sternites 5 and 6 with anteromedial apodemes. Oviscape (Figs 38–40) moderately short and wide, 1.8 mm long, almost as long as thorax and preabdomen, conspicuously shorter than distance from wing base to vein R 1 apex and equal to distance from wing base to vein Sc apex; at apex about 0.8× as wide as at base; in profile curved dorsally, very slightly tapered to apex and without subapical callus.Aculeus (Fig.45) short triangular, not barbed subapically, 0.46 mm long and 1.1× as long as diameter of oviscape at apex. Spermathecae and ventral receptacle not found.

Male. Unknown.

Holotype: ♀ (dissected) NIGERIA: “ Ile-Ife [7.4667°N 4.5667°E], Nigeria / 15Aug. 1970 / Col. T.J.Medler ” ( USNM).

Remarks: The variation in the body coloration and wing pattern can exist in larger series.

Figures

Figs 1–9.Pyrgotomyia spp.:(1) P.ciliata, holotype;(2, 6) P.richteri; (3) P.temporalis; (4, 8) P.callosa sp.n., holotype; (5, 9) P. stuckenbergi sp. n., holotype; (7) P. terebrans sp. n., holotype. (1, 2) head, left view; (3) head, latero-ventral view (antennae, mouthparts and setae not shown); (4–7) supraclypeal sclerite, latero-ventral view; (8, 9) mesonotum, dorsal view.

Figs 10–15. Pyrgotomyia spp., wing: (10) P. ciliata, holotype; (11) P. richteri; (12) P. temporalis; (13) P. terebrans sp. n., holotype; (14) P. callosa sp. n., holotype; (15) P. stuckenbergi sp. n., holotype.

Figs 16–22. Pyrgotomyia spp.: (16, 20) P. richteri, male; (17) P. richteri, female; (18) P. callosa sp. n., female; (19) P. stuckenbergi sp. n., female; (20–22) P. sp. cf. temporalis, male. (16–19) abdominal sternites; (20) epandrium, right view; (21, 22) glans of phallus, right and ventral views (slightly enlarged compared to 20).

Figs 46–53. Pyrgotomyia spp., habitus: (46) P. richteri, female, KwaZulu-Natal; (47) P. sp. cf. temporalis, male, Kenya; (48) P. temporalis, holotype female, Togo; (49) P. temporalis, female, Tanzania; (50) P. terebrans sp. n., holotype female, Ivory Coast; (51) P. sp. cf. terebrans, male, Nigeria; (52) P. callosa sp. n., holotype female, Cameroon; (53) P. stuckenbergi sp. n., holotype female, Nigeria. Scale bar = 5 mm.