Prionolabis Osten Sacken, 1860

Podenas, Sigitas, Park, Sun-Jae & Aukštikalnienė, Hye-Woo Byun and Rasa, 2022, Prionolabis crane flies (Diptera: Limoniidae) of Korea, Journal of Species Research 11 (1), pp. 29-37 : 31

Key to Korean species of the genus Prionolabis Osten Sacken

1. Wing cell m 1 present ( Figs. 2B , 3B ) ··························· 2 - Wing cell m 1 missing ( Figs. 4B , 5A )·························· 3

2. Inner gonostylus of male genitalia five-toothed at apex ( Fig. 2D ). Tibia light brown with dark brown distal part ( Fig. 1A ). Knob of halter pale yellow ··························· ·············· Prionolabis acanthophora ( Alexander, 1938) - Inner gonostylus of male genitalia, bifid at apex ( Fig. 3C, 3D ). Tibia dark brown with black apex. Knob of halter brownish····························································· ······················· Prionolabis clavaria ( Alexander, 1950) 3. Male antenna reaching to about middle of abdomen, if bent backwards, antennal flagellum 13-segment- ed ( Fig. 4A ). Outer gonostylus of male genitalia not branched, bearing just small subapical tooth ( Fig. 4C ) ································ Prionolabis dis ( Alexander, 1950) - Male antenna nearly as long as the entire body, antennal flagellum 14-segmented. Outer gonostylus of male genitalia with two long branches ( Fig. 5B ) ·················· ·············· Prionolabis yankovskyana ( Alexander, 1940)

Figures

Fig. 2. Prionolabis acanthophora (Alexander, 1938), male. A. an- tenna. B. wing. C. male genitalia in glycerol, dorsal view. D. male genitalia slide-mounted, dorsal view, Alexander’s metatype. Scale bars: 0.5 mm (A, C, D), 1.0 mm (B).

Fig. 3. Prionolabis clavaria (Alexander, 1950), male. A. antenna. B. wing. C. male genitalia in glycerol, dorsal view. D. male geni- talia slide-mounted, dorsal view, holotype. Scale bars: 0.5 mm (A, C, D), 1.0 mm (B).

Fig. 4. Prionolabis dis (Alexander, 1950), male. A. antenna. B. wing. C. aedeagus, gonocoxite and gonostyli of male genitalia, slide-mounted, dorsal view, holotype. Scale bars: 1.0 mm (A, B), 0.5 mm (C).

Fig. 5. Prionolabis yankovskyana (Alexander, 1940), male. A. wing. B. male genitalia slide-mounted, dorsal view, paratype. Scale bars: 1.0 mm (A), 0.5 mm (B).

Fig. 1. Sexual dimorphism in Prionolabis Osten Sacken, 1860. A. male of P. acanthophora (Alexander, 1938). B. female of P. hospes (Egger, 1863). Scale bars: 1.0 mm.