Phygasia ornata Baly, 1876

Lee, Chi-Feng, 2012, The genus Phygasia Chevrolat (Coleoptera: Chrysomelidae: Galerucinae: Alticini) in Taiwan, Zootaxa 3256, pp. 27-37 : 32-33

Phygasia ornata Baly, 1876

( Figs 6 , 12, 13 , 16, 19, 22, 25, 26)

Phygasia ornata Baly, 1876: 445 ( Hong Kong); Maulik, 1926: 413 ( India); Chen, 1933a: 43 ( China: Guandong); Chen, 1933b: 221 ( China: Jiangxi, Guizhou); Gressitt & Kimoto, 1963: 885 ( China: Fujian); Wang, 1995: 266 ( China: Zhejiang); Yu et al., 1996: ( China: Hubei, Hunan, Sichuan, Guanxi, Hainan, and Yunnan); Mohamedsaid, 1998: 93 ( Malaysia); Kimoto, 2000: 268 ( Thailand); Medvedev, 2007: 635 ( Vietnam); Ge et al., 2008: 555 ( China: Henan and Anhui).

Lactica bipustulata Jacoby, 1892: 919 ( Burma) . Synonymized by Scherer (1969)

Description. Male. Length 6.0– 6.3 mm, width 3.3–3.6 mm. General color ( Fig. 6 ) yellowish-brown; antennomeres III-XI, tibia, tarsus black; elytron black, with one big transverse white band at middle, anterior border horizontal, posterior border oblique, apex orange. Pronotum about 1.9 wider than long, disc finely wrinkled, with scattered fine punctures. Elytra 1.4 times longer than wide, lateral margin slightly rounded, widest just behind middle, disc with densely distributed small punctures and randomly occurring large punctures.

Antenna ( Fig. 12 ) with antennomeres III-VII widened; ratio of length of antennomeres III to XI about 1.0: 1.3: 1.4: 1.2: 1.4: 1.1: 1.2: 1.1: 1.4, ratio of length to width of antennomeres III to XI about 1.3: 1.6: 1.7: 1.5: 1.9: 2.0: 2.3: 2.3: 2.9. Penis (Figs 16a, b) elongate, about 4.6 times longer than wide, apex of tectum much lower than that of penis, subparallel-sided, strongly narrowed subapically, evenly convex ventrally, apex rounded, moderately curved in lateral view.

FIGTURE 14–16. Male genitalia. 14. P. chengi , a: dorsal, b: lateral; 15. P. diluta , a: dorsal, b: latera; 16. Phygasia ornata , a: dorsal, b: lateral; l. Scale = 1.0 mm.

Female. Length 6.0– 6.2 mm, width 3.3–3.5 mm. Antennomeres III-VI narrower ( Fig. 13 ), ratio of length of antennomeres III to XI about 1.0: 1.1: 1.1: 1.1: 1.1: 1.1: 1.0: 1.0: 1.1, ratio of length to width of antennomeres III to XI about 1.9: 1.9: 1.8: 1.9: 2.1: 2.1: 2.1: 2.3: 2.8. Gonocoxae ( Fig. 19 ) medially connected, apex widely rounded, base weakly sclerotized, three long setae at apex, two or three long setae at outer side. Spermatheca ( Fig. 22 ) with receptacle strongly swollen; pump strongly curved, apex pointed; proximal spermathecal duct wide. Spiculum of sternite VIII ( Fig. 25 ) rather slender. Only one pair of bursa-sclerites present, each with single seta.

Diagnosis. Phygasia ornata is similar to P. c h e n g i with its black antenna, tibia, and tarsus, but differing with the slender penis (aedeagus is about 4.6 times longer than wide in P. o r n a t a, while the same is about 3.5 times longer than wide in P. chengi ), pointed apex of spermathecal pump (apex of spermthecal pump rounded in P. chengi and P. diluta , and relatively longer spiculum of sternite VIII (shorter spiculum of sternite VIII in P. chengi and P. diluta ), and the consistent color pattern (median white band on the elytra in P. chengi and P. diluta is variable).

Material examined (12 specimens). 13, 1Ƥ, Chinmen, 30.IV.2008, leg. W.-T. Liu ( TARI); 33, 1Ƥ, Chinmen, Maoshanta, 12.V.2011, leg. Y.-J. Chang ( TARI); 33, 3ƤƤ, Chinmen, Chungshanlin, 17–19.V.2008. leg. C.- S. Tung ( TARI).

Host plant. Asclepiadaceae : Gymnema sylvestre (Retz.) Schultes.

Distribution. China (Anhui, Fujian, Guandong, Guanxi, Guizhou, Hainan, Henan, Hong Kong, Hubei, Hunan, Jiangxi, Sichuan, Yunnan), India, Malaysia, Myanmar, Thailand, Taiwan (Kinmen island, new record), Vietnam. In Taiwan, this species is found only on Kinmen island (= Chinmen) ( Fig. 26 ). Ten other species of Chrysomelidae were recorded from Kinmen island by Shih et al. (2002).

Figures

FIGURE 26. Distribution map of Phygasia species, solid line: 1000 m, broken line: 2000 m; blue dot: P. c he ng i; red dot: P. diluta; black dot: P. chengi and P. diluta; green dot: P. o r n a t a.

FIGURES 1 – 6. Color habitus of Phygasia species, dorsal. 1 - 3. P. chengi; 4 - 5. P. diluta; 6. P. o r n a t a.

FIGURES 7 – 13. Antenna. 7. P. chengi, male; 8. P. chengi, male; 9. P. c h e n g i, female; 10. P. diluta, male; 11. P. diluta, female; 12. Phygasia ornata, male; 13. P. o r n a t a, female. Scale = 1.0 mm.

FIGURES 17 – 25. Female genitalia. 17. P. chengi, gonocoxae; 18. P. diluta, gonocoxae; 19. Phygasia ornata, gonocoxe; 20. P. chengi, spermatheca; 21. P. diluta, spermatheca; 22. P. ornata, spermatheca; 23. P. chengi, sternite VIII; 24. P. d i l u t a, sternite VIII; 25. P. o r n a t a, sternite VIII.