Azaleothrips bali, Okajima, Shûji & Masumoto, Masami, 2014

Okajima, Shûji & Masumoto, Masami, 2014, Species-richness in the Oriental fungus-feeding thrips of the genus Azaleothrips (Thysanoptera, Phlaeothripidae), Zootaxa 3846 (3), pp. 301-347 : 310-311

Azaleothrips bali sp.n.

( Figs 12–18 )

Female macroptera. Body brown to dark brown, posterior half of metathorax, pelta and abdominal segments VIII and IX paler, often prothorax a little paler than head. Antennal segment III yellow, often shaded with pale brown at distal 1/2; basal 1/4 of segment IV yellowish ( Fig. 13 ). Fore femora yellowish, in contrast with brown coxae, outer side usually shaded with brown; mid and hind femora brown with apical 1/3 yellowish; tibiae yellow, often weakly shaded with brown. Fore wings shaded, paler in basal 1/4.

Head ( Fig. 12 ) almost as long as wide, dorsal surface generally reticulate, reticles with internal delicate wrinkles. Postocular setae shorter than half the length of compound eye. Antennal segments VII and VIII not closely joined; segments VII + VIII almost as long as segment III; segment IV almost as long as segment III; segment III with three (1 + 2), segment IV with four sensoria. Pronotum ( Fig. 14 ) entirely sculptured with lines of reticulation, not tuberculate, usually with more than 24 short setae (28 setae in holotype). Basantra absent. Mesonotum ( Fig. 15 ) with very small dentate microtrichia or tubercles along transverse lines of sculpture, almost smooth among lines. Metanotum anterior longitudinally striate ( Fig. 15 ), posterior longitudinally reticulate; anterior half usually with 4 to 7 (rarely 8 or 9) short setae. Fore tarsus with a tooth. Fore wing with 7/8 duplicated cilia in holotype. Pelta weakly reticulate. S1 setae on abdominal tergite IX shorter than half the length of tube; S2 setae on tergite IX expanded at apex. Tube a little shorter than two-thirds the length of head. Anal setae longer than tube.

Measurements (holotype female in microns). Distended body length 2150. Head length 200, width across cheeks 200. Pronotum length 133, width 230. Fore wing length 750. Tube length 125, width across base 58. Antenna length about 400, segments III–VIII length (width) as follows: 65 (34), 66 (34), 55 (28), 50 (25), 40 (22), 26 (14). Postocular setae 26–30. S1 setae on tergite IX 55 –60, S2 setae on tergite IX 80 –85. Anal setae about 150.

Male macroptera. Color very similar to female. Prothorax usually paler than head, sometimes yellowish; abdominal segment IX darker. Structure similar to female, but showing size-related variation (= allometry): Prothorax ( Fig. 17 ) and fore legs including fore tarsal tooth largely developed in large male. Pore plate on abdominal sternite VIII distinct ( Fig. 18 ). S2 setae on abdominal tergite IX blunt, but nearly pointed at apex.

Measurements (small–large paratype males in microns). Distended body length 1200–1800. Head length 130–190, width across cheeks 135–170. Pronotum length 82–143, width 147–215. Fore wing length about 500–about 700. Tube length 80–about 100, width across base 40–53. Antenna length 295–about 400, segments III–VIII length (width) as follows: 48–62 (28–33), 48–64 (28–31), 44–57 (22–25), 41–53 (23–24), 32–38 (18–20), 22–25 (10–12). Postocular setae 35. S1 setae on tergite IX about 50, S2 setae on tergite IX about 50.

Specimens examined. Holotype female macroptera: Indonesia, Bali Is., Buleleng, Melanting, on dead branches, 16.viii.2006 (SO).

Paratypes: Indonesia, Bali Is., 9 females and 10 males, collected with holotype: same locality as holotype, 1 female and 1 male, 30.viii.2005 (SO), 8 females and 4 males, 31.viii.2005 (SO), 10 females and 19 males, 15.viii.2006 (SO), 11 females and 11 males, 17.viii.2006 (SO); 1 male, Buleleng, Yehketipat, 8.viii.2005 (SO); Buleleng, Belatung, 1 male, 15.viii.2005 (SO), 2 females, 16.viii.2005 (SO); 1 female, 20km NE from Gilimanuk, Banyuwedan, 29.viii.1984 (SO).

Remarks. This species belongs to the amabilis group and although not closely related, it shares some character states with formosae , described below from Taiwan.

Figures

FIGURES 12 – 18. Azaleothrips bali sp. n. (12) head, female; (13) antennal segments III & IV, female; (14) pronotum, female; (15) meso & metanotum, female; (16) head, male; (17) pronotum, male; (18) sternite VIII, male.