Phygasia ornata

Lee, Chi-Feng, 2012, The genus Phygasia Chevrolat (Coleoptera: Chrysomelidae: Galerucinae: Alticini) in Taiwan, Zootaxa 3256, pp. 27-37 : 28

Phygasia ornata species group

Diagnosis. Color ( Figs 1–6 ) yellowish-brown, elytra black with atransverse white band at middle, and orange apex. Male antenna with antennomeres III-VII widened ( Figs 7–13 ). Penis (Figs 14–16) in dorsal view parallel-sided, strongly narrowed subapically, apex rounded; moderately curved in lateral view. Spermatheca ( Figs 20–22 ) with receptacle swollen; pump curved; proximal spermathecal duct wide. Sternite VIII ( Figs 23–25 ) weakly sclerotized at apex, with several short setae along apical border. Spiculum slender. Gonocoxa ( Figs 17-19 ) weakly sclerotized basally, apex widely rounded, with three to five long setae at outer side, two or three long setae at apex. Bursa sclerites present in P. diluta and P. ornata . Phygasia ornata with one pair of bursa-sclerites, each with single seta. Number and size of bursa-sclerites vary greatly in P. diluta . Some individuals with only one pair of bursa-sclerites bearing single seta; others with two pairs of bursa sclerites, dorsal pair ( Figs 27 a, 28a) better developed, with three or four prominent setae, base well-developed; ventral pair ( Figs 27 b, 28b) with one to three prominent setae but base weakly-sclerotized.

Note. Members of Phygasia ornata species group can be distinguished by the color pattern: yellowish-brown head, pronotum, and venter; and the black elytron with a white spot at middle, and the orange elytral apex. No other species group has so far been recognized in Phygasia .

Although female genitalic structures are very similar in members of this species group, most of them, except gonocoxa, are diagnostic. Gonocoxa ( Figs 17–19 ) is not diagnostic as the number of setae on apex and outer side are highly variable.

Figures

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.

FIGURES 27 – 28. Bursa-sclerites of Phygasia diluta, a: dorsal bursa-sclerites, b: ventral bursa-sclerites. 27. Collected from Tahanshan; 28. Collected from Kenting.