Cerdistus bresseeli, Tomasovic & Constant & Rasmont, 1802

Tomasovic, Guy, Constant, Jérôme & Rasmont, 1802, Notes on Oriental Asilidae with six new species from Vietnam (Diptera: Brachycera), Belgian Journal of Entomology 47, pp. 1-23 : 1-23

publication ID	https://doi.org/ 10.5281/zenodo.13272459
persistent identifier	https://treatment.plazi.org/id/AB3B2105-FFAC-FFCE-CB08-FC31FAB7F7E7
treatment provided by	Felipe
scientific name	Cerdistus bresseeli
status	sp. nov.

Treatment

Cerdistus bresseeli sp. nov.

urn:lsid:zoobank.org:act:08D52442-3488-49F4-ACCD-A1BBBE457E74

Figs 8–10. View Fig View Fig View Fig

DIAGNOSIS. Postpedicel with a microsegment; facial gibbosity restricted to the lower half of the face; metanotal callosity with long setae; abdominal tergites with lateral setae.

The species is close to Cerdistus laetus Becker, 1925 but can be separated from the latter by the yellowish grey tomentum and yellow chaetotaxy of abdomen and the black legs (abdomen greyish black and legs red in C. laetus ).

ETYMOLOGY. The species name is a patronym dedicated to Mr Joachim Bresseel who collected part of the type series.

TYPE MATERIAL. Holotype ♂ ( Fig. 8 View Fig ): Vietnam, Hoang Lien NP, 22°21 N- 103°46 E, 1-5.VII.2013, Leg J. Constant & J. Bresseel, IG. 33.453. GoogleMaps

Paratypes: 1♂, 1♀, same data as holotype GoogleMaps .

DESCRIPTION

Male: ( Figs 8–9 View Fig View Fig ) length of body: 15 mm. Mesototum black with white stripes. Abdomen yellowish. Legs black. Wings slightly infuscate.

Head: ( Figs 8 B View Fig , 9 B View Fig ) face with white tomentum. Mystax with white setae in middle, surrounded by black setae. Frons and ocellar tubercle with black setae. Occiput with greyyellowish tomentum; postocular bristles stout and black mixed with black setae. Antennae black; scape and pedicel with numerous black setae; scape as long as pedicel; postpedicel as long as scape and pedicel together; microsegment conspicuous; style with micro sensory element and as long as postpedicel. Proboscis black with fine white hairs on ventral part. Palpi black with long black setae.

Thorax: ( Figs 8 A, C–D View Fig , 9 A, C–D View Fig ) antepronotum with black setae. Scutum with white stripes on sides and 2 central on disc, and with sparse, short, black setae. Bristles stout, long and black: 2 notopleural, 2 supra-alar, 2 post-alar, 6-8 dorsocentral. Scutellum with greyish tomentum, small black hairs on disc and 6 stout scutellar bristles. Pleura with greyish tomentum and long, fine white hairs. Katatergal and metepisternal setae numerous, long, fine and white.

Legs: ( Fig. 8 View Fig ) rather long and black. Femora not swollen; profemora with long, fine and white hairs on ventral part and 2-3 fine black setae apically; mesofemora partly covered with lying, short, yellow piles, and with 4 fine, long, black setae; metafemora largely covered with short, yellow, lying piles, with long and fine yellow setae, and with 2 black setae on distal part. Pro- and mesotibiae with long, fine, black setae; metatibiae with a yellow brush. Tarsi black with black setae; metatarsus showing a brush similar to that on metatibiae.

Wings: ( Figs 8 A View Fig , 9 A View Fig ) slightly infuscate with black veins.

Abdomen: ( Fig. 9 A, C–D View Fig ) tergites and sternites with yellowish-grey tomentum and yellow chaetotaxy. Tergites I-II with a black spot; all tergites with long setae and short hairs. Sternites with long and fine setae.

Male genitalia: ( Figs 9 A, C–D View Fig , 10 View Fig ) black; epandrium with sparse setae and with a process at apex ( Fig. 10 C View Fig ). Gonocoxites oblong, triangular; dististylus wider apically with two distinct humps ( Fig. 10 B View Fig ). Phallus slightly curved and parallel-sided; distiphallus very short, with three hardly distinct tubes ( Fig. 10 A View Fig ).