Delia dentiaedeagus, Du, Jing & Xue, Wanqi, 2017

Du, Jing & Xue, Wanqi, 2017, Four new species of the genus Delia Robineau-Desvoidy in the Yunnan Province of China (Diptera, Anthomyiidae), ZooKeys 693, pp. 141-153 : 143

Delia dentiaedeagus sp. n. Figure 1

Type material.

Holotype. China, Yunnan Province, Baimang Snowberg, 4000 m, 29 May 2007, Dandan Wang Co., ♂(IESNU). Paratype. China, Yunnan Province, Baimang Snowberg, 4000 m, 31 May 2007, Lu Zhang Co., 2♂♂(IESNU).

Diagnosis.

Arista short ciliated, longest hairs shorter than its basal diameter; legs black; mid tarsomere 1 with long ad; processes of 5th sternite slender, with long and dense setae, without spine or protrusion.

Description.

Holotype Male. Body length 4.5-5.0 mm.

Head. Eye bare; frontal vitta dark brown without interfrontal setule; fronto-orbital plate adjacent; frons as wide as anterior ocellus; without orbital setae; fronto-orbital plate and parafacial with grey dust; 5-6 pairs of frontal setae, situated on lower half of frons; parafacial subequal to the width of antenna; antenna black, postpedicel approx. 2.2-2.5 times longer than broad; arista short ciliated, longest hairs shorter than its basal diameter; lower facial margin not projecting, situated behind frontal angle in profile; genal height approx. 1/5 eye height; anterior margin of gena with one row of upcurved subvibrissal setulae; prementum black, without dust, approx. 3.5 times longer than broad; palpus black, slightly shorter than prementum.

Thorax. Black in ground colour, with grey to brownish grey dust; scutum with three black vittae, the middle one extended to scutellar suture; prst acr two rows, only one pair of post acr developed which are placed in front of scutellum, dc 2+3, ial 0+2; notopleural despression bare apart from two strong setae; pra as long as posterior notopleural; scutellum bare on disc centrally and basally; katepisternals 1+2.

Wing. Slightly transparent. Vein fuscous and basicosta black; Costa setulous near its base on ventral surface only; costal spine distinct; radial node bare; squamae brownish yellow, lower squama not projecting, approx. 2/3 length of upper; haltere yellowish.

Legs. Entirely black; fore tibia with one medial p; mid femur without distinct av row, a row of seta-like pv in basal half, only two setae in basal developed; mid tibia without av or ad, two pd and two pv; mid tarsomere 1 with distinct ad; hind femur with 2-3 av and 2-3 pv in distal part; hind tibia with four av, three ad, three pd, and 5-6 pv in middle part, without apical pv; hind tarsi longer than tibiae, all claws and pulvilli normal, slightly shorter than tarsomere 5.

Abdomen. Black, rhombic in dorsal view, with grey to brownish dusting; all tergites with black vittae in middle part; dorsal setae sparse, lateral setae long; 6th tergite bare; 1st sternite with setae.

Female. Unknown.

Remarks.

This new species is similar to Delia felsicanalis Fan & Wu in Fan et al., 1984, but differs from it in the following features: male frontal vitta dark brown; fronto-orbital plate adjacent; parafacial subequal to the width of antenna; prementum 3.5 times longer than broad; basicosta black; haltere yellowish; hind tibia with four av, three ad and 5-6 pv in middle part.

Etymology.

The species name is derived from the Latin words “dent” meaning tooth and “aedeagus” meaning aedeagus, referring to its apical aedeagus with tooth.

Distribution.

China, Yunnan Province (Baimang Snowberg).