Keilbachia criniloba, 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 : 11

Keilbachia criniloba sp. n.

( Fig. 7 A–D)

Type locality: INDIA: North East Frontier Agency, Arunachal Pradesh, Kameng Forest Division, Jhum La.

Material examined: Holotype male. INDIA: North East Frontier Agency, Arunachal Pradesh, Kameng Forest Division, Jhum La, 7800 ft. a.s.l., 25.3.1961, leg. F. Schmid ( SDEI)

Description. Male. Colour. Head and thorax dark brown, abdomen paler brown, legs and hypopygium yellowish brown, tarsi darker towards apex, wings fumose brown. Head. Eye bridge 3 acets wide. Face (prefrons) with 8 setae. Maxillary palpus with 3 palpomeres. Clypeus and maxillary palpus poorly seen in the specimen studied. Antenna long, flagellomere 4, Fig. 7 A, body 3 times as long as wide, neck shorter than long, flagellomeral setae much shorter than the width of flagellomeral body. Thorax. Anterior pronotum with 7 setae. Episternum 1 with 14 setae. Wings. Length 4.2 mm, width/length 0.38, R1/R 0.50. c/ w 0.95. r-m and bM of nearly equal length, non-setose. M fork long and narrow, longer than stM, extending more basad than the meeting point of R1 and C. Legs. Apex of fore tibia, Fig. 7 B. Length of fore basitarsomere /length of fore tibia 0.75. Abdomen. Setae of sternite 8 not visible in the specimen studied. Hypopygium ( Fig. 7 C, D). Tegmen somewhat damaged in the holotype, conical, apically richly micro-trichose. Aedeagal apodeme moderately long. Gonocoxite longer than gonostylus, ventroapical corner of gonocoxite elongated. Gonostylus with 3–4 long, slender curved megasetae arising from a common basal body, placed on the basal half of gonostylus, one separate megaseta at the apical side of the former. In addition, one subapical, dorsal megaseta; apical tooth present.

Female. Unknown.

Discussion. Keilbachia criniloba is similar to K. flagria Mohrig , K. fasciata , K. filigera , K. flabellata , K. gigas and K. foveolata , which also have more than two megasetae arising from a common basal body. K. criniloba differs from all these species by having a stout megaseta placed near the sub-basal group of megasetae. By its tegmen, K. criniloba resembles K. filigera Hippa & Vilkamaa , both having the apex of the tegmen densely microtrichose.

Figures

FIGURE 7. Keilbachia criniloba 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.