Ctenosciara

Vilkamaa, Pekka, Hippa, Heikki & Mohrig, Werner, 2012, The genus Ctenosciara Tuomikoski (Diptera, Sciaridae) in New Caledonia, with the description of eight new species, Zootaxa 3255, pp. 37-51 : 38

Key to New Caledonian species of Ctenosciara

1. Intercoxal lobe of hypopygium present........................................................ C. lobigera sp. n.

- Intercoxal lobe of hypopygium absent..................................................................... 2

2. Gonostylus with unusual dense setosity....................................................... .. C. crinita sp. n.

- Gonostylus with normal setosity.......................................................................... 3

3. Wing veins M and CuA non-setose, vestiture of front tibial organ in short row ( Fig. 4 B)................ .. C. depilis sp. n.

- Wing veins M and CuA1 setose, vestiture of front tibial organ in long row ( Figs 7 B, 8 B)............................ 4

4. Gonostylus tumid, its length/width (at broadest part) ca. 2.0–2.1................................................ 5

- Gonostylus narrow, its length/width (at broadest part) ca. 2.5–3.5................................................ 6

5. Apical megaseta(e) present on gonostylus, subapical megasetae with distinct basal bodies in addition to their sockets............................................................................................... C. inflata sp. n.

- Apical megaseta(e) absent from gonostylus, subapical megasetae with sockets only...................... C. obesa sp. n.

6. Mesial megasetae of gonostylus in two distinct subapical pairs, with wide gap between................... C. exilis sp. n.

- Mesial megasetae of gonostylus in one subapical group or indistinctly scattered.................................... 7

7. Gonostylus abruptly attenuated, laterally straight or slightly concave at apical third, its mesial side with five strong megasetae...................................................................................... C. depressa sp. n.

- Gonostylus evenly narrowed towards apex or at most slightly depressed apicolaterally, its mesial side with 3–4 moderately strong megasetae variable in placement........................................................ C. cracens sp. n.

Figures

FIGURE 4. Ctenosciara depilis sp. n. (A, C, D holotype, B paratype). A. Antennal flagellomere 4, lateral view. B. Apical part of front tibia, prolateral view. C. Gonostylus, ventral view. D. Part of hypopygium, ventral view. Scale 0.1 mm.

FIGURE 7. Ctenosciara inflata sp. n. (holotype). A. Antennal flagellomere 4, lateral view. B. Apical part of front tibia, prolateral view. C. Part of hypopygium, ventral view. D. Gonostylus, ventral view. Scale 0.1 mm.