Keilbachia

Vilkamaa, Pekka, Komarova, Lyudmila A. & Hippa, Heikki, 2006, The genus Keilbachia Mohrig (Diptera: Sciaridae) in a biodiversity hot spot: new sympatric species from Kambaiti, Burma, Zootaxa 1123, pp. 39-55 : 40-42

Key to the species of Keilbachia

1. Gonostylus with 2 or more large mesial megasetae arising from common basal body 2

­ Gonostylus with only 1 large mesial megaseta arising from basal body ...................... 3

2. Gonostylus with 2 mesial megasetae arising from common basal body......................... ....................................................................................................... biflagrispina Mohrig

­ Gonostylus with 6 mesial megasetae arising from common basal body. flagria Mohrig

3. Ventral side of gonocoxite at least slightly lobe­like and produced at apicomesial angle, ( Menzel & Mohrig 2000: Figs. 322, 325; Menzel & Martens 1995: Fig. 16); gonostylus with elongated mesial seta, distinctly longer than other mesial setae......... 4

­ Ventral side of gonocoxite at apicomesial angle simple, not lobe­like and produced; gonostylus without elongated mesial seta ( Figs. 5–9 ) .................................................. 5

4. Ventral apicomesial lobe of gonocoxite prominent; large mesial megaseta on middle of gonostylus; elongated apicomesial seta long, much longer than mesial large megaseta; antennal flagellomeres, palpomeres, tibiae, and tarsi unusually elongated .................... ........................................................................................................... nepalensis Mohrig

­ Ventral apicomesial lobe of gonocoxite small; large mesial megaseta on basal half of gonostylus; elongated mesial seta short, about as long as large mesial megaseta; antennal flagellomeres, palpomeres, tibiae, and tarsi normal........................ hamata Menzel

5. Gonostylus with subapical megasetae ( Figs. 5–9 ) ........................................................ 7

­ Gonostylus without subapical megasetae......................................................................6

6. Maxillary palp without sensory pit; tegmen broadest subapically, with sharp apicolateral shoulders ..................................................................................... acerspina Mohrig

­ Maxillary palp with sensory pit; tegmen broadest basolaterally, without sharp apicolateral shoulders. ...................................................................................... indigena Mohrig

7. Subapical megasetae of gonostylus stout (e.g. Figs. 5 , 7–9 )......................................... 8

­ Subapical megasetae of gonostylus slender ( Fig. 6 ). ................................ arrecta sp. n.

8. Large mesial megaseta of gonostylus short, shorter than maximal width of gonostylus; tegmen unmodified, with straight lateral sides ( Fig. 5 A, B) .................... apprima sp. n.

­ Large mesial megaseta of gonostylus long, at least as long as maximal width of gonostylus; tegmen modified, with curved or complex lateral sides ( Figs. 6–9 ).................. 9

9. Subapical megasetae of gonostylus close to each other, both at apical fourth of gonostylus ( Figs. 6–9 ). ........................................................................................................ 10

­ Subapical megasetae of gonostylus wider apart, basalmost one at apical third of gonostylus ............................................................................. sasakawai (Mohrig & Menzel)

10. Subapical megasetae of gonostylus subequal in size .................................................. 11

­ Apicalmost subapical megaseta of gonostylus much larger than other........................... ............................................................................................ ferrata (Hippa & Vilkamaa)

11. Basal body of large mesial megaseta of gonostylus with apical lobe ( Fig. 9 ) ............ 17

­ Basal body of large mesial megaseta of gonostylus without apical lobe ( Figs. 5–8 ).. 12

12. Basal body of large mesial megaseta of gonostylus long, at least 3 times as long as wide ( Fig. 8 ). ............................................................................................................... 16

­ Basal body of large mesial megaseta of gonostylus at most 2 times as long as wide ( Figs. 5 , 7 ) ................................................................................................................... 13

13. Tegmen modified, slightly broader subbasally than subapically, with apicolateral roundish shoulders, sockets of subbasal megasetae of gonostylus about as long as megasetae themselves ........................................................................ tenerrima Menzel

­ Tegmen simple, much broader subbasally than subapically, without apicolateral roundish shoulders, sockets of subbasal megasetae of gonostylus much shorter than megasetae themselves ( Figs. 5 C, 6A, D, 7A, C)..................................................................... 14

14. Mesial megaseta short and slightly curved ( Fig. 5 D) ................................ demissa sp. n.

­ Mesial megaseta of gonostylus long and strongly curved (e.g. Fig. 7 B, D) ............... 15

15. Basal body of mesial megaseta of gonostylus uniformly broad ( Fig. 7 B). scutica sp. n.

­ Basal body of mesial megaseta of gonostylus narrowed basally ( Fig. 7 D) .................... .......................................................................................................... flagrispina Mohrig

16. Distance between 2 subapical megasetae of gonostylus wider than length of megaseta ( Fig. 8 B) .................................................................................................. tenuicula sp. n.

­ Distance between 2 subapical megasetae of gonostylus almost as wide as length of megaseta ( Fig. 8 D) ......................................................................................... mira sp. n.

17. Apical lobe of basal body of mesial megaseta rounded and broad ( Fig. 9 B) ................. ................................................................................................................... arcuata sp. n.

­ Apical projection of basal body of mesial megaseta pointed and narrow ( Fig. 9 E) ....... .................................................................................................................. aculeata sp. n.

Figures

FIGURE 5. Part of hypopygium (A, C) and gonostylus (B, D), ventral view. A, B, Keilbachia apprima sp. n. (holotype). C, D, K. demissa sp. n. (holotype). Scale 0.10 mm.

FIGURE 6. Keilbachia arrecta sp. n. (holotype). Part of hypopygium (A) and gonostylus (B) and subapical megaseta and two ordinary setae of gonostylus (C), ventral view. Scale for A and B 0.10 mm, for C 0.05 mm.

FIGURE 7. Part of hypopygium (A, C) and gonostylus (B, D), ventral view. A, B, Keilbachia scutica sp. n. (holotype). C, D, K. flagrispina Mohrig (from Burma). Scale 0.10 mm.

FIGURE 8. Part of hypopygium (A, C) and gonostylus (B, D), ventral view. A, B, Keilbachia tenuicula sp. n. (holotype). C, D, K. mira sp. n. (holotype). Scale 0.10 mm.

FIGURE 9. Part of hypopygium (A, C), tegmen (D) and gonostylus (B, E), ventral view. A, B, Keilbachia arcuata sp. n. (holotype). C – E, K. aculeata sp. n. (holotype). Scale for A – C and E 0.10 mm, for D 0.05 mm.