Cordilura, Fallen, 1810

Iwasa, Mtsuhiro, 2020, Contribution to the knowledge of the genus Cordilura Fallén (Diptera, Scathophagidae) from Japan, with descriptions of three new species, Zootaxa 4748 (3), pp. 471-484 : 482-483

Key to the Japanese species of Cordilura (males and females)

1. Postpedicel long, about 3 times as long as wide ( Fig. 18 ).......................................... C. remmi Elberg - Postpedicel normal, about 2 times as long as wide ( Fig. 6 )..................................................... 2 2. Thoracic sclerites wholly black.......................................................................... 3 - Thoracic sclerites wholly or partly yellow to greyish microtrichose.............................................. 4 3. Fore legs wholly yellow ( Fig. 10 )............................................................ C. katoi sp. nov. - Fore femora wholly black and fore tibiae yellow ( Fig. 24 ).................................... C. shinonagai sp. nov.

4. Scutum and thoracic sclerites greyish microtrichose ( Fig. 28 )................................... C. yezoana sp. nov.

- Scutum shining or subshining........................................................................... 5

5. Scutum subshining; thoracic sclerites greyish microtrichose......................... C. richterae Ozerov & Krivosheina

- Scutum shining; thoracic sclerites shining and wholly or partly yellow........................................... 6

6. Thoracic sclerites wholly yellow........................................................... C. albipes (Fallén)

- Thoracic sclerites partly yellow; anepimeron black........................................................... 7

7. Frons wholly yellow ( Fig. 16 ); wing with a dark spot apically ( Fig. 15 ); posterior lobe of male surstylus more setigerous and ventrally projected (see Sasakawa (1986))................................................. C. nubecula Sasakawa

- Frons wholly or posteriorly dark brown to black; wing without a dark spot apically ( Fig. 5 ); posterior lobe of male surstylus weakly setigerous and ventrally not projected ( Figs 8, 9 )..................................... C. cuspidata Sasakawa

Figures

FIGURES 17–20. Cordilura remmi Elberg, specimen from Hokkaido. 17, male adult, lateral view; 18, postpedicel and pedicel, left lateral view; 19, male terminalia, lateral view; 20, male terminalia, posterior view.

FIGURES 5–9. Cordilura cuspidata Sasakawa, specimen from Hokkaido. 5, male adult, left lateral vew; 6, male postpedicel and pedicel, left lateral view; 7, male palpus, left lateral view; 8, male terminalia, left lateral view; 9, male terminalia, posterior view.

FIGURES 10–14. Cordilura katoi sp. nov., holotype. 10, male adult, left lateral view; 11, male sternite V; 12, male terminalia, left lateral view; 13, male terminalia, posterior view; 14, female terminalia, left lateral view.

FIGURES 24–27. Cordilura shinonagai sp. nov., holotype. 24, male adult, left lateral view; 25, male sternite V; 26, male terminalia, left lateral view; 27, male terminalia, posterior view.

FIGURES 28–31. Cordilura yezoana sp. nov., holotype. 28, male adult, left lateral view; 29, male sternite V; 30, male terminalia, left lateral view; 31, male terminalia, posterior view.

FIGURES 15–16. Cordilura nubecula Sasakawa, specimen from Hokkaido. 15, female adult, left lateral view. 16, female head, dorsal view.