Neandrothrips ommatocellus, Okajima & Masumoto, 2025

Neandrothrips ommatocellus sp. nov.

( Figs 183 View FIGURES 177–186 , 219–226 View FIGURES 219–226 )

Female (macroptera). Distended body length: about 1.50–1.65mm. Body brown ( Fig. 183 View FIGURES 177–186 ). Femor brown, fore femora with apices somewhat paler; fore and mid tibiae brown, a little paler than femora, with bases and apices paler, hind femora weakly shaded with brown, with bases and apices paler; tarsi yellow. Antennal segments I– II and IV – VIII brown, segment IV a little paler than segment V, with base somewhat paler; segment III largely yellowish, scarcely shaded at distal half. Fore wing and major body setae pale. Head ( Fig. 219 View FIGURES 219–226 ) much longer than wide, about times as long as wide, 1.33 times in holotype, widest across cheeks; dorsal surface weakly sculptured with transverse striae at posterior half. Cheeks very weakly rounded or subparallel, weakly serrated. Eyes about one-third of head length, 0.33 times as long as head in holotype; ommatidia scarcely spaced from each other. Ocelli normal; posterior pair in contact with eyes, 23µm apart from each other in holotype. Postocular setae shorter than eyes, expanded; 82µm apart from each other, 9–10µm apart from eyes in holotype. Antennae ( Fig. 226 View FIGURES 219–226 ) about 1.8 times as long as head; segment VIII weakly constricted at base, about 0.7 times as long as VII; segments III and IV with two (1+1) and three (1+2 +1) sense cones respectively. Maxillary stylets retracted to the middle of head capsule, usually not reaching postocular setae, widely apart and almost V-shaped; maxillary bridge distinct, a little wider than half of head width. Pronotum ( Fig. 219 View FIGURES 219–226 ) about 0.7 times as long as head, 0.67 times in holotype, about 1.5 times as wide as long; almost smooth, but sculptured at near posterior margin; five pairs of prothoracic setae expanded, am, aa and ml subequal in length; epim longer than postocular setae. Prospinasternum ( Fig. 220 View FIGURES 219–226 ) relatively large, widely fan-shaped, about 35µm wide in holotype; mesopresternum complete. Mesonotal lateral setae expanded, shorter than 20µm. Metanotum ( Fig. 221 View FIGURES 219–226 ) weakly sculptured with reticulation, but very weak at middle; median pair of setae pointed, about 20µm, 38µm apart from each other, 32–33µm apart from anterior margin in holotype. Fore tarsal tooth absent ( Fig. 224 View FIGURES 219–226 ), but with very small apical tooth. Fore wing with 3–4 duplicated cilia; three sub-basal setae expanded; S3 the longest. Pelta ( Fig. 222 View FIGURES 219–226 ) triangle, with irregular lateral margins, about 1.3 times as wide as long. Tergite VI and VII S1 setae much shorter than S1 on tergite IX. Tergites III – VIII S2 setae: III – VI expanded, VII sharply pointed, VIII blunt or very weakly expanded. Tergite IX S1 setae almost pointed, a little longer than tube, S2 on IX sharply pointed, longer than S1; intermediate setae about half of S1, or a little shorter. Tube longer than 0.5 times as long as head, 0.54 times in holotype, 1.8–1.9 times as long as wide; terminal setae about 1.3 times as long as tube .

Measurements (holotype female in µm). Body length about 1600 (distended). Head length 160, from anterior margin of eyes 146, width across eyes 115, maximum width across cheeks 120, minimum width across base 103; eyes length 53; diameter of posterior ocelli 9–13; postocular setae 33–35. Maxillary bridge width 63. Antenna total length 290, segments III–VIII length (width) as follows: 37 (23), 37 (25), 39 (21), 37 (20), 35 (18), 25 (12). Pronotum length 107, width 160. Setae on prothorax: am 22–24, aa?20, ml 22, pa 29–30, epim 42. Fore wing length 550. Sub-basal wing setae: S1 23 –24, S2 23 –25, S3 32 –34. Pelta length 57, width 75. Setae on tergite VIII: S1 about 60. Tergite IX setae: S1 92, S2 110–113. Tube length 87, maximum width 47; terminal setae 115.

Male (macroptera). Distended body length: 1.2–1.3mm. Very similar to macropterous female in color and structure, not shows allometric growth. Head often longer than 1.4 times as long as wide; fore wing with 2–4 duplicates cilia.

Measurements (paratype male in µm). Body length 1270 (distended). Head length 159, from anterior margin of eyes 142, width across eyes 107, maximum width across cheeks 109, minimum width across base 95; eyes length 55; diameter of posterior ocelli 10–12; postocular setae 22–24. Maxillary bridge width 53. Antenna total length 265, segments III–VIII length as follows: 35, 34, 33, 33, 33, 25. Pronotum length 98, width 138. Setae on prothorax: am 15–17, aa?, ml about 20, pa 22, epim 32. Fore wing length 500. Sub-basal wing setae: S1 23 –25, S2 23 –25, S3 32 –34. Pelta length 50, width 62. Tergite IX setae: S1 70, S2 30. Tube length 73, maximum width 42; terminal setae 93.

Type material. Holotype: macropterous female, Thailand, Phuket, on dead branches, 19.viii.1976, SO . Paratypes: Thailand, Phuket, 1 female, collected together with holotype; same locality as holotype, 1 male, on dead banana leaf, 17.viii.1976, 1 male, on dead twigs, 18.viii.1976, SO; 2 males, Rang Hill, on dead leaves and branches, 14.ix.1992, SO . Thailand, nr. Chiang Mai, Pha Hean , 3.ix.1992, 2 females and 3 males, TN, 1 female and 2 males, SO; 1 male, nr. Chiang Rai, Pha Yao, on grass, 5.ix.1992, SO. Peninsular Malaysia, 1 male, Tapah , on dead leaves, 26.vii.1976, SO .

Comments. This species is included in the inermis -group, and closely related to two Indonesian species, N. inermis sp. nov. from Flores Is. and N. subinermis sp. nov. from Bali Is. That are also in this group. However, it can be distinguished from inermis by the following features: antennal segment IV darker; maxillary stylets not reaching postocular setae; ommatidia scarcely spaced from each other; postero-lateral setae S1 on tergite VI short, shorter than S1 on tergite IX; S1 on tergite IX a little longer than tube. From subinermis , it is easily distinguished by the antennal segment IV with three (1+2 +1) sense cones instead of two (1+1 +1).