Miridiba

Li, Chun-Lin, Yang, Ping-Shih & Wang, Chuan-Chan, 2015, A review of the genus Miridiba Reitter (Coleoptera: Scarabaeidae: Melolonthinae) of Taiwan, Zootaxa 3955 (4), pp. 521-536 : 523

Key to Miridiba species of Taiwan

1. Dorsum of body more or less setose; range of body length 14.1–21.3 mm; antennae with 9 antennomeres; parameres symmetrical, divided into upper and lower parts, inner margins with fringe of robust, long setae.............................. 2

-. Dorsum of body glabrous ( Figs. 6 , 12 , 18); body length 19.5–22.8 mm; antennae with 10 antennomeres parameres asymmetrical, not divided into upper and lower parts, glabrous ( Fig. 39 ).................. Miridiba (Pledina) sinensis ( Hope, 1842)

2. Overall dorsal surface (with exception of clypeus and scutellum glabrous) densely covered with hair-like, long setae; parameres smoothly curved downwardly ( Fig. 33 )................... Miridiba (Miridiba) taipei Wang & Li , new species

-. Overall dorsal surface covered with tiny to moderately long setae, smallest setae shorter than diameter of puncture; parameres obtusely curved at apically ( Figs. 25, 27, 29, 31 )............................................................. 3

3. Most setae on pronotum and elytra shorter than diameter of puncture with exception of a few long setae on base of elytra, sutural costa and in front of scutellum (Fig. 13).......................... Miridiba (Miridiba) kuraruana Nomura, 1977

-. Setae on pronotum and elytra subequal to or distinctly longer than diameter of puncture..............................4

4. Disc of pronotum and elytra with setal length subequal to diameter of puncture; metafemora elongate, slightly broadened at middle ( Fig. 20 )............................................ Miridiba (Miridiba) huesiotoi Li & Yang , new species

-. Disc of pronotum and elytra with setal length distinctly longer than diameter of puncture; metafemora more or less broadened anteriorly and posteriorly ( Figs. 21, 22 ).................................................................... 5

5. Body length less than 17 mm; apex of clypeus moderately bilobed ( Fig. 9 ); base of elytra with only a few of long setae; metafemora less broadened anteriorly and posteriorly ( Figs. 21 ); parameres with upper part gradually curved downwardly ( Fig. 29 )..................................................... Miridiba (Miridiba) taoi Li & Wang , new species

-. Body length greater than 17 mm; apex of clypeus weakly bilobed ( Fig. 10 ); base of elytra with a row of long, hair-like setae; metafemora distinctly broadened anteriorly and posteriorly ( Figs. 22 ); parameres with upper part strongly curved apically ( Fig. 31 )............................................................. Miridiba (Miridiba) formosana ( Moser, 1909)

Figures

FIGURES 1 – 6. Dorsal habitus of male Miridiba species. 1. Miridiba kuraruana; 2. Miridiba huesiotoi, holotype; 3. Miridiba taoi, holotype; 4. Miridiba formosana; 5. Miridiba taipei, holotype; 6. Miridiba sinensis.

FIGURES 7 – 12. Dorsal view of head and upper half of pronotum of male Miridiba species. 7. Miridiba kuraruana; 8. Miridiba huesiotoi, holotype; 9. Miridiba taoi, holotype; 10. Miridiba formosana; 11. Miridiba taipei, holotype; 12. Miridiba sinensis.

FIGURES 33 – 40. Parameres of Miridiba species (33, 35, 37, 39, lateral view; 34, 36, 38, 40, dorsal view). 33 – 34. Miridiba taipei; 35 – 36. Miridiba trichophora; 37 – 38. Miridiba hirsute; 39 – 40. Miridiba sinensis. Scale bar = 1.0 mm.

FIGURES 25 – 32. Parameres of Miridiba species (25, 27, 29, 31, lateral view; 26, 28, 30, 32, dorsal view). 25 – 26. Miridiba kuraruana; 27 – 28. Miridiba huesiotoi; 29 – 30. Miridiba taoi; 31 – 32. Miridiba formosana. Scale bar = 1.0 mm.

FIGURES 19 – 24. Right metafemur of male Miridiba species. 19. Miridiba kuraruana; 20. Miridiba huesiotoi, n. sp.; 21. Miridiba taoi, n. sp.; 22. Miridiba formosana; 23. Miridiba taipei, n. sp.; 24. Miridiba sinensis.