Azaleothrips mindanaoensis, 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 : 330-331

Azaleothrips mindanaoensis sp.n.

( Figs 87–91 )

Female macroptera. Body brown to dark brown. Abdominal segment IX a little paler. Antennal segments I and II brown; segment III shaded with pale brown, with basal 2/5 yellowish; segment IV brown at middle, with basal 1/3 yellowish, with apical 1/4 paler ( Fig. 88 ); segment V pale brown at middle, with basal 1/3 yellowish; segment VI pale brown, with basal 1/4 yellowish; segments VII and VIII brown. Fore femora brown, concolorous with head, yellowish at apex; mid and hind femora brown, yellowish at apices; all tibiae brown at middle. Fore wing weakly shaded with brown, with basal 1/4 paler.

Head ( Fig. 87 ) almost as long as wide; dorsal surface asperate, generally strongly reticulate, with small tubercles along reticles, with irregular small tubercles among reticles. Postocular setae shorter than half the length of compound eye. Antennal segments VII and VIII closely joined ( Fig. 89 ); segments VII + VIII a little longer than segment III; segment IV almost as long as segment III, about 1.6 times as long as wide; segment III with three (1 + 2), segment IV with four sensoria. Pronotum ( Fig. 90 ) asperate, with numerous small tubercles, without lines of reticulation; with 28 short setae in holotype. Epimeral suture complete. Basantra absent. Mesonotum ( Fig. 91 ) with small tubercles or dentate microtrichia along transverse striation, almost smooth among striae. Metanotum ( Fig. 91 ) asperate, longitudinally but fragmentary striate; anterior half with 4 short setae. Fore tarsus unarmed. Fore wing with 6/7 duplicated cilia in holotype. Pelta distinctly reticulate, with weak wrinkles among reticles. Lateral portions of abdominal tergite II asperate, coarse with very small tubercles among dentate striation or reticulation; S1 setae on abdominal tergite IX almost as long as half the length of tube, or a little shorter; S2 setae expanded at apex. Tube about 0.6 times as long as head. Anal setae longer than tube.

Measurements (holotype female in microns). Distended body length 1630. Head length 175, width across cheeks 178. Pronotum length 122, width 207. Fore wing length about 600. Tube length 105, width across base 51. Antenna length about 310, segments III–VIII length (width) as follows: 49 (29), 48 (30), 43 (25), 42 (24), 33 (22), 20 (13). Postocular setae 25. S1 setae on tergite IX about 50, S2 setae on tergite IX 72 –74. Anal setae 145.

Male macroptera. Color and structure very similar to female. Fore tibiae yellow. Prothorax stout, pronotum with a stout median longitudinal groove. Fore legs stout, fore tarsus with a stout tooth. Mesonotal sculpture weaker than that of female. Fore wing with 7/7 duplicated cilia. Pore plate on abdominal sternite VIII distinct, but comparatively narrow. S2 setae on abdominal tergite IX pointed at apex.

Measurements (paratype male in microns). Distended body length about 1500. Head length 160, width across cheeks 158. Pronotum length 133, width 201. Fore wing length about 570. Tube length 97, width across base 50. Antenna length about 300, segments III–VIII length (width) as follows: 45 (30), 45 (27), 43 (25), 40 (23), 32 (21), 20 (12). Postocular setae 25. S1 setae on tergite IX 53 –58, S2 setae on tergite IX 37 –40. Anal setae 125.

Specimens examined. Holotype female macroptera: Philippines, Mindanao Is., North Cotabato, Ilomavis, on dead leaves, 26.vii.1979 (SO).

Paratypes: Philippines, 1 female, collected with holotype; 1 male, data very similar to holotype, but 28.vii.1979.

Remarks. This species belongs to the amabilis group. However, the asperate head ( Fig. 87 ), closely joined antennal segments VII and VIII ( Fig. 89 ) and absence of female fore tarsal tooth are distinctive within the group, and those character states are shared with dorsalis , newly described above from Indonesia. From dorsalis it can easily be distinguished by the unicolorous brown metanotum, brown mid tibiae and stouter reticulation of the pelta.

Figures

FIGURES 87 – 96. Azaleothrips species. mindanaoensis sp. n. female 87 – 91: (87) head; (88) antennal segments III & IV; (89) antennal segments VII & VIII; (90) pronotum; (91) meso & metanotum. philippinensis sp. n. 92 – 96: (92) head, female; (93) pronotum, female; (94) meso & metanotum, female; (95) tergite II, female; (96) sternite VIII, male.