Keilbachia macripes, 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 : 13-15

Keilbachia macripes sp. n.

( Fig. 9 A–F)

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). Paratypes. NEPAL: Karnali Prov., Himalaya, Gothichaur valley,, 29°12'10"N 82°18'56"E, 2900–3050 m a.s.l., white water trap, 1 male, 10.6.1997, leg. J. Weipert ( MZH). Karnali Prov., Himalaya, above Maharigaon, above camp, 29°20'24"N 82°23'21"E, 3300–3400 m a.s.l., sweep-net, 1 male, 20.6.1997, leg. J. Weipert ( SDEI).

Description. Male. Colour. Head, antennae. and thorax brown, coxae andomen and hypopygium paler brown, legs yellowish, wings fumose. Head. Eye bridge 2–3 facets wide. Face (prefrons) with 3–5 setae. Clypeus with 1 seta. Maxillary palpus ( Fig. 9 A, B) with 3 palpomeres. Palpomere 1 with 1 seta, 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 long, flagellomere 4, Fig. 9 C, body 3.1–3.7 times as long as wide. Flagellomeral necks long, setae longer than width of flagellomeral bodies. Thorax. Anterior pronotum with 2 setae. Episternum 1 with 6 setae. Wings. Length 2.4–2.5 mm, width/length 0.4. R1/R 1.00–1.10. c/ w 0.70 –0.75. r-m and bM of about equal length or r-m shorter, r-m and bM non-setose. Anal lobe weak. Haltere with long stalk. Legs. Long. Apex of fore tibia, Fig. 9 D. Length of fore basitarsomere/length of fore tibia 0.45–0.70. Tibial spurs longer than the apical width of tibiae. Abdomen. Sternite 8 with 7–12 setae.

Hypopygium ( Fig. 9 E, F). Tegmen longer than broad, apically narrowed. Aedeagal apodeme long, ca 15 aedeagal teeth. Gonocoxite slightly longer than gonostylus. Gonostylus narrow, mesially slightly impressed, narrowed towards apex, with one large apical megaseta and one (in the left gonostylus of the holotype two, (see Fig. 10 E) slender megaseta arising from a very long and slender basal body at the basal fourth of the gonostylus.

Female. Unknown.

Discussion. Keilbachia macripes resembles the Burmese K. tenuicula Vilkamaa, Komarova & Hippa and K. mira Vilkamaa, Komarova & Hippa by having a very long but unmodified basal body of the mesial megaseta, placed at the basal half of the gonostylus. Unlike in these two other species, the megaseta in K. macripes is about as long as its basal body, not much longer. In addition, the tegmen of K. macripes is different. Furthermore, K. macripes is much larger (wing length 2.4–2.5 mm, vs. 1.6 and 1.8 mm).

Figures

FIGURE 9.. Keilbachia macripes sp. n. (A, C, E and F holotype, B and D paratype from Maharigaon, 3300 – 3400 m a. s. l.). Maxillary palpus in lateral view (A) and in dorsal view (B), antennal flagellomere 4 (C) in lateral view, apex of front tibia (D) in prolateral view, part of hypopygium (E) and gonostylus (F) in ventral view. Scale for B 0.05 mm, for others 0.10 mm.

FIGURE 10. Keilbachia megacantha 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.