Stylogaster hauseri, Stuke, 2012

Stuke, Jens-Hermann, 2012, A revision of Afrotropical species of Stylogaster Macquart (Diptera: Conopidae), with descriptions of twenty-one new species and an identification key, African Invertebrates 53 (1), pp. 267-267 : 293-297

publication ID	https://doi.org/ 10.5733/afin.053.0118
persistent identifier	https://treatment.plazi.org/id/B906C41A-812A-FFC9-CEAB-FA08E671FAB4
treatment provided by	Felipe
scientific name	Stylogaster hauseri
status	sp. nov.

Treatment

Stylogaster hauseri View in CoL sp. n.

Figs 77–90 View Figs 77–81 View Figs 82–88 View Figs 89, 90

Etymology: The species is named in honour of Martin Hauser (Sacramento), who has supplied the author with conopids over many years.

Diagnosis: The greatly enlarged basal flagellomere ( Fig. 80 View Figs 77–81 ) is unique to the species and is readily diagnostic. The male terminalia are also diagnostic ( Figs 82–88 View Figs 82–88 ), especially the unique field of small black teeth on the surstylus ( Fig. 83 View Figs 82–88 ).

Description (based on holotype):

Male.

Overall length: ca 8.0 mm.

Head: 1.8 mm high. Eye dark brown, with a few scattered, inconspicuous ommatrichia. Facets on inner side slightly enlarged. Ocelli yellowbrown. Ocellar tubercle blackish brown, with 1 pair of inconspicuous ocellar setae. Ocellar triangle occupies virtually entire frons, reaching as far as antennae ( Fig. 81 View Figs 77–81 ). Ocellar triangle orangebrown. Frons black lateral to ocellar triangle, with 2 proclinate frontoorbital setae. Scapus and pedicellus yellowbrown, basal flagellomere pale brown, darker brown on dorsal surface. Arista dark brown, black at apex, 3 segments evident. Arista situated dorsally at apex of basal flagellomere ( Fig. 80 View Figs 77–81 ). Scapus with few pale brown setulae dorsally. Pedicellus with black and golden setulae. Shape of antenna as illustrated in Fig. 80 View Figs 77–81 . One distinct golden vertical seta. Face pale yellow with silver pruinosity. Occiput brown, distinctly silver pruinose; dorsally with line of regularly-arranged small white setulae, ventrally with several longer white setulae. Some long white setulae on mouth opening. Proboscis mainly brown, except for yellow-brown distal division of labellum. Labrum ca 3.2 mm, labellum approximately same length.

Thorax: Yellow-brown.All setae golden. Two notopleural setae, 1 supra-alar seta, 2 postalar setae, 1 (damaged) praescutellar dorsocentral seta, 1 apical scutellar seta, 1 seta on anepimeron and 1 seta above fore coxa on propleuron. Golden, semi-adpressed setulae on mesoscutum.

Wing: Length 6.0 mm. Generally clothed in microtrichia, except for bc, base of r 2+3, partly br, bm, base of dm, cup and base of anal lobe, which are virtually without microtrichia; bc whitish, not transparent. Hind margin of wing with black setulae. Venation as in Fig. 78 View Figs 77–81 . Haltere uniformly yellowbrown, with areas of sensillae at base.

Legs: Fore and mid legs whitish yellow, hind leg brown, with white setulae and setae, hind femur and tibia with black setulae and setae, hind coxa with golden setulae and setae. Fore and mid coxae without distinct setae, but with strong golden setulae distally. Hind coxa with strong golden setulae distally on the anterior surface and with smaller golden setulae laterally. Hind trochanter without teeth or conspicuous setulae. Mid femur with row of regularly-arranged golden setulae posteriorly in distal half. Hind tibia with single short black spines on anterior surface. Claws only narrowly yellow-brown basally, black distally. Pulvilli yellow-brown. Empodia short, pale brown.

Abdomen: Uniformly orangebrown ( Fig. 79 View Figs 77–81 ). Tergites with semiadpressed black and golden setulae. Tergite 1 with long golden setulae laterally, tergite 2 with ca 10 lateral golden setae on either side at anterior margin. Terminalia as illustrated in Figs 82–88 View Figs 82–88 . Cercus straight dorsally ( Fig. 84 View Figs 82–88 ). Cercus with conspicuous lappet ventrally ( Fig. 85 View Figs 82–88 ). No conspicuous teeth ventrally. No black setae. Surstylus with small field of conspicuous short black spines distally ( Fig. 83 View Figs 82–88 ). Some long black setulae on inner surface. Phallus sheath as illustrated in Fig. 86 View Figs 82–88 . The strong black setulae basally are conspicuous.

Female.

Similar to male, differing in the following respects: facets on inner side of eye more markedly enlarged; basal flagellomere narrowly dark brown dorsally; setae and setulae on thorax and abdomen almost completely black; tergites 2–5 with darkened posterior margins (in 1 specimen). One female with white area subapically on hind tibia with few white setulae. Female terminalia illustrated in Fig. 89 View Figs 89, 90 .

Egg ( Fig. 90 View Figs 89, 90 ).

At least 157 eggs were discovered in the macerated paratype. Egg has two small, inconspicuous, poorly sclerotised lateral barbs at the extreme apex.

Holotype: ♂ MADAGASCAR: (1) “ Madagascar, Fianarantsoa Prov, 17km / W Ranomafana , Vohiparara , / Ranomafana Nat’l Park , malaise in / rainforest, 25.VII–03.VIII.2002, / 1110m, R Harin’Hala, ME Irwin, / 21°13.57'S 47°22.19'E, MG 9A36”; (2) “ Holotypus / Stylogaster / hauseri ♂ / des. Stuke, 2009 ( CAS)”. Left front tibia, front tarsi and left mid tarsi missing. Abdomen dissected, macerated and deposited in glycerine in a microvial pinned beneath specimen, holotype otherwise in good condition. GoogleMaps

Paratypes: MADAGASCAR: Fianarantsoa: 1♀ same data as for holotype, except: 15–25.v.2002 GoogleMaps ; 1♀ radio tower at forest edge, 21°15.05'S 47°24.43'E, 1130 m, 15–18.iii.2006, R. Harin’Hala & M.E. Irwin, MA02 09B142 (both CAS) GoogleMaps ; 1♀ Selle Vue , 1.2 km S Ranomafana National Park entrance, 21°15.99'S 47°25.21'E, 1095 m, 26.ii–10.iii.2003, R. Harin’Hala & M.E. Irwin, Malaise trap in rainforest, MG9C55 ( JHS) GoogleMaps .

Distribution: Apparently confined to Madagascar.

Bionomics: Sampled in primary rainforest at moderately high elevation (1095–1130 m).