Keilbachia clinata, Hippa, Heikki & Vilkamaa, Pekka, 2007

Hippa, Heikki & Vilkamaa, Pekka, 2007, New species and records of Keilbachia Mohrig (Diptera, Sciaridae) from the Oriental region, Zootaxa 1622, pp. 57-68 : 63-64

Keilbachia clinata sp. n.

Fig. 4 A–F.

Material studied. Holotype male. MALAYSIA, Borneo, Sabah, Sipitang, Mendolong 10.3.1989, S. Adebratt (in NRMS). Paratypes. 1 male, MALAYSIA, Borneo, Sabah, Kinabalu, Pain KQ 3500’, Malaise trap, 4.– 5.12.1976 (in BMNH).

Male. Colour. Almost unicolorous brown, maxillary palpus and legs paler brown than the other parts, abdomen slightly paler than thorax, wing hyaline brownish, haltere pale brown. Head. Eye bridge 4 facets wide. Face (prefrons) with 10–13 setae, which are widely spread. Clypeus with 1 seta. Maxillary palpus, Fig. 4 A: with 3 palpomeres. Palpomere 1 with 1 seta, the hyaline sensilla widely scattered on the dorsal surface, no sensory pit. Palpomere 2 with 6–8 setae. Palpomere 3 with 5–6 setae. Antennal flagellomere 4, Fig. 4 B. Thorax. Anterior pronotum with 2 setae. Episternum 1 with 4 setae. Wing similar to Fig. 5 A, length 1.35–1.40 mm. Width/length 0.45. R1/R 0.75–0.85. c/ w 0.70. r-m slightly shorter than bM, r-m/bM 0.80–0.85, both nonsetose. Legs. Apex of fore tibia, Fig. 4 C. Length of fore basitarsomere/length of fore tibia 0.50. Length of fore tibia/length of fore femur 1.25–1.30. Length of hind tibia/length of scutum+scutellum 2.05, measured only for the paratype because the thorax of the holotype is slightly broken. Hypopygium Fig. 4 D, E, F: Gonostylus with the curved megaseta rather short, about as long as its basal body, without additional megasetae or an apical tooth. The ventral mesial margin of the gonostylus at its middle with several lobes associated with the basal body of the megaseta and additional unusual lobes at the base of the latter ( Fig. 4 F). Tegmen simple.

Female unknown.

Discussion. Keilbachia clinata is similar to K. adunca . The species differ e.g. by the following characters: 1) In K. clinata the setae of the antennal flagellomeres are short and evenly distributed ( Fig. 4 B), while in K. adunca the setae are long and arranged in whorls ( Fig. 1 C). 2) In K. clinata the mesial megaseta of the gonostylus is longer and curved only at base, while in K. adunca the megaseta is shorter and curved throughout its whole length. 3) In K. clinata the mesial side of the gonostylus has unusual lobes whereas it is simple in K. adunca . 4) In K. clinata the tegmen is simple, while in K. adunca is has strong lateral shoulders. K. clinata is also similar to K. orthonema . For distinguishing characters, see under the latter.

Figures

FIGURE 1. Keilbachia adunca sp. n. (B, E, F holotype, A, C, D, G, H from Sipitang). A, B: Maxillary palpus, dorsal (A) and mesial (B) view. C: Antennal flagellomere 4, ventral view. D: Apical part of tibia 1, prolateral view. E, G: Part of hypopygium, ventral view. F, H: Gonostylus, ventral view. Scale 0.10 mm.

FIGURE 4. Keilbachia clinata sp. n. (A, B, C, D, E holotype, F paratype). A: Maxillary palpus, dorsal view. B: Antennal flagellomere 4, ventral view. C: Apical part of tibia 1, prolateral view. D: Part of hypopygium, ventral view. E: Gonostylus, ventral view. F: Mesial side of gonostylus, ventral view. Scale 0.10 mm.

FIGURE 5. Keilbachia mirabilis sp. n. (B, C, E, F holotype, A, D paratypes). A: Maxillary palpus, dorsal view. B: Antennal flagellomere 4, ventral view. C: Apical part of tibia 1, prolateral view. D: Wing, dorsal view. E: Part of hypopygium, ventral view. F: Gonostylus, ventral view. Scale 0.05 mm, for D 0.5 mm.