Keilbachia inscissa, Vilkamaa, Pekka, Menzel, Frank & Hippa, Heikki, 2009

Vilkamaa, Pekka, Menzel, Frank & Hippa, Heikki, 2009, Review of the genus Keilbachia Mohrig (Diptera: Sciaridae), with the description of eleven new species, Zootaxa 2272, pp. 1-20 : 12-13

Keilbachia inscissa sp. n.

( Fig. 8 A–D)

Type locality: NEPAL: Karnali Prov., Himalaya, Maharigaon.

Material examined: Holotype male. NEPAL: Karnali Prov., Himalaya, Maharigaon [labelled as ‘Maharigaun’], 29°20'24"N 82°23'21"E, 3200 m a.s.l., sweep-net, 16.6.1997, leg. J. Weipert ( SDEI).

Description. Male. Colour. Head, thorax and abdomen dark brown, antenna and coxa slightly pale brown, legs yellowish, tarsi darker, wings fumose. Head. Eye bridge 3–4 facets wide. Face (prefrons) and clypeus poorly seen in the specimen studied. Maxillary palpus with 2 palpomeres. Palpomere 1 with 1 or 2 setae, the hyaline sensilla in patch on the dorsal surface, no sensory pit. Palpomere 2 smaller than palpomere 1, with 5 setae. Antenna long, flagellomere 4, Fig. 8 A, body 3.1 times as long as wide. Flagellomeral necks shorter than long, flagellomeral setae as long as width of flagellomeral bodies or slightly shorter. Thorax. Anterior pronotum with 5 setae. Episternum 1 with 6 setae. Wings. Length 2.8 mm, width/length 0.4.R1/R 0.95. c/ w 0.45. bM longer than r-m, r-m/bM 0.75. r-m and bM non-setose. Anal lobe weak. Legs. Long. Apex of fore tibia, Fig. 8 B. Length of fore basitarsomere/length of fore tibia 0.65. Tibial spurs longer than the apical width of tibiae. Abdomen. Abdominal setae strong. Setae of sternite 8 not seen in the holotype. Hypopygium ( Fig. 8 C, D). Tegmen longer than broad, constricted at the middle, apical half with smooth lateral corners. Aedeagal apodeme moderate. Aedeagal teeth ca. 15. Gonostylus narrowed apically, with a sub-basal group of 2 long curved megasetae arising from a common basal body, two additional hyaline megasetae at the apical fourth of gonostylus, apical tooth present.

Female. Unknown

Discussion. Although decribed here as having two mesial megasetae arising from a common basal body, Keilbachia inscissa can be interpreted to have three of them, as one of the megasetae seems to be split in two in the left gonostylus of the holotype. For further discussion, see under K. bifida .

Figures

FIGURE 8. Keilbachia inscissa sp. n. (holotype). Antennal flagellomere 4 (A) in lateral view, apex of front tibia (B) in prolateral view, part of hypopygium (C) and gonostylus (D) in ventral view. Scale for A 0.05 mm, for others 0.10 mm.