Corynoptera vagula

Vilkamaa, Pekka & Hippa, Heikki, 2006, Corynoptera vagula Tuomikoski and allied species (Diptera: Sciaridae), Zootaxa 1150, pp. 31-42 : 32-33

Key to the species of the Corynoptera vagula complex

1. Two basalmost megasetae of gonostylus close to each other, arising from common basal body ( Figs. 1 B, D; 3D) ........................................................................................ 2

­ Two basalmost megasetae of gonostylus not especially close to each other nor arising from common basal body (e.g., Fig. 2 B) ...................................................................... 3

2. Two basalmost megasetae situated on apical half of gonostylus, tegmen subquadrangular, intercoxal area of hypopygium not modified, normally setose ( Fig. 1 )................ .......................................................................................................... vagula Tuomikoski

­ Two basalmost megasetae situated at middle of gonostylus, tegmen broader than high, intercoxal area of hypopygium slightly elongated, mesially densely setose ( Fig. 3 D, E) ................................................................................................................ fratercula sp. n.

3. Gonostylus club­shaped, broadest subapically, tegmen subquadrangular, tibial apex without prolateral comb ( Figs. 3 A, B; 6A) ............................................. armigera sp. n.

­ Gonostylus broadest at middle, tegmen broader than long, tibial apex with subapical comb ( Fig. 2 )................................................................................................................. 4

4. Gonostylar megasetae 9 in number, length of longest ones about 1/4 of greatest width of gonostylus ............................................................................. nyxa Mohrig & Menzel

­ Longest gonostylar megasetae 5 or 6 in number, length of longest ones 1/3–1/2 of greatest width of gonostylus.......................................................................................... 5

5. Basal antennal flagellomeres and their setae long ( Fig. 5 A), tibial apex with 6 modified setae in uneven comb ( Fig. 6 B), wing length 1.7 mm ........... fera Mohrig & Heller

­ Basal antennal flagellomeres and their setae shorter ( Fig. 6 D), tibial apex with comb of 3 setae ( Fig. 6 E), wing length 1.1 mm ................................................ robustior sp. n.

Figures

FIGURE 1. Corynoptera vagula Tuomikoski (A and B holotype, C and D from Kuujjuarapik). A, part of hypopygium. B, D, gonostylus. C, tegmen and associated structures, ventral view. Scale 0.10 mm.

FIGURE 2. Part of hypopygium (A and D) and gonostylus (B and C), ventral view. A, B, Corynoptera fera Mohrig & Heller (from Somero). C, D, C. robustior sp. n. (holotype). Scale 0.10 mm.

FIGURE 3. Part of hypopygium (A and E), gonostylus (B and D), and tegmen (C), ventral view. A, B, Corynoptera armigera sp. n. (holotype). C – E, C. fratercula sp. n. (C paratype from Alaska, D and E holotype). Scale 0.10 mm.

FIGURE 5. Antennal flagellomere 4, ventral view. A, Corynoptera fera Mohrig & Heller (from Somero). B, C. vagula Tuomikoski (from Kuujjuarapik). C, C. fratercula sp. n. (holotype). D, C. robustior sp. n. (holotype). E, C. armigera sp. n. (holotype). Scale 0.05 mm.

FIGURE 6. Apex of front tibia, prolateral view. A, Corynoptera armigera sp. n. (holotype). B, C. Corynoptera fera Mohrig & Heller (from Somero). C, C. vagula Tuomikoski (holotype). D, C. fratercula sp. n. (holotype). E, C. robustior sp. n. (holotype). Scale 0.05 mm.