Keilbachia trispinoides, 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 : 16

Keilbachia trispinoides sp. n.

( Fig. 11 A–D)

Type locality: INDIA: Andhra Pradesh, Hydarabad.

Material examined. Holotype male. INDIA: Andhra Pradesh, Hydarabad, University campus, sweep-net, 20.10.1997, leg. J. Olejnicek ( SDEI).

Description. Male. Colour. The specimen studied is bleached, original colours unidentifiable. Head. Eye bridge 3 facets wide. Face (prefrons) with 7 setae. Clypeus with 1 seta. Maxillary palpus with 3 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 4 setae, palpomere 3 elongated, with 5 setae. Antenna moderately long, flagellomere 4, Fig. 11 A, body 1.6 times as long as wide. Flagellomeral necks as long as wide, setae slightly shorter than width of flagellomeral bodies. Thorax. Anterior pronotum with 2 setae. Episternum 1 with 2 setae. Wings. Length 1.0 mm, width/length 0.4. R1/R 0.55. c/w not measured; fork of M, r-m and bM poorly visible in the specimen. Anal lobe weak. Legs. Apex of fore tibia, Fig. 11 B. Length of fore basitarsomere/ length of fore tibia 0.45. Tibial spurs longer than the apical width of tibiae. Abdomen. Setae of sternite 8 not visible in the specimen. Hypopygium ( Fig. 11 C, D). Tegmen broader than its length, with distinct lateral shoulders. Aedeagal apodeme short, aedeagal teeth ca. 20. Gonocoxite longer than gonostylus. Gonostylus slightly narrowed towards apex, with a long curved megaseta on a small basal body at the basal third of gonostylus, with two slender subapical megasetae; no apical tooth.

Female. Unknown.

Discussion. By its relatively long and strongly curved mesial megaseta on a small basal body, Keilbachia trispinoides resembles K. arrecta Vilkamaa, Komarova & Hippa and K. ancylonema Hippa & Vilkamaa. K. trispinoides differs from both latter species by having the subapical megasetae very long and slender, not short and stout, and by having strong lateral shoulders in the tegmen.

Figures

FIGURE 11. Keilbachia trispinoides sp. n. (holotype). Antennal flagellomere 4 (A) in ventral 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.