Neandrothrips pahangi, Okajima & Masumoto, 2025

Neandrothrips pahangi sp. nov.

( Figs 184–186 View FIGURES 177–186 , 227–235 View FIGURES 227–235 )

Female (macroptera). Distended body length: about 1.50–1.85mm. Body brown to dark brown ( Figs 184 & 185 View FIGURES 177–186 ). Legs brown to dark brown; fore tibiae brown, a little paler than femora; mid and hind tibiae dark brown, but bases of hind tibiae yellowish; tarsi brownish yellow. Antennae dark brown, segment III with extreme base yellowish. Fore wing weakly shaded with brown, with bases darker. Major body setae pale. Head ( Figs 227 & 228 View FIGURES 227–235 ) much longer than wide, 1.3–1.4 times as long as wide, 1.32 times in holotype, widest across cheeks just behind eyes; dorsal surface weakly sculptured with transverse striae or reticles. Cheeks almost straight or very weakly rounded, gradually narrowed towards base, weakly serrated, anterior end bulged and overlapping with eyes. Eyes a little shorter than 0.3 times as long as head, 0.28 times in holotype. Ocelli relatively small; posterior pair in contact with eyes, 23µm apart from each other in holotype. Postocular setae much shorter than eyes, expanded; 97µm apart from each other, 7–9µm apart from eyes in holotype. Antennae ( Fig. 235 View FIGURES 227–235 ) 1.64 times as long as head in holotype; segment VIII slender, weakly constricted at base, narrowly joined to segment VII, 0.7–0.8 times as long as VII, 0.73 times in holotype; segments III and IV each with three sense cones, (1+2) and (1+2 +1) respectively. Maxillary stylets long, retracted to eyes, close together, 13µm apart from each other in holotype; maxillary bridge invisible even if using the phase contrast illumination. Pronotum ( Figs 227 & 228 View FIGURES 227–235 ) enlarged in large female, about 0.6 times as long as head in small female, more than 0.7 times in large female, 0.74 times in holotype, more than 1.6 times as wide as long in small female, less than 1.5 times in large female, 1.43 times in holotype; almost smooth, but sculptured at near posterior margin; five pairs of prothoracic setae expanded, but am short and slender. Prospinasternum ( Fig. 231 View FIGURES 227–235 ) inverted triangle, about 35µm wide in holotype; mesopresternum narrowly boat-shaped, but swollen medially. Mesonotal lateral setae short, expanded, shorter than 15µm. Metanotum sculptured with longitudinal reticulation, but weak at middle; median pair of setae pointed, longer than 20µm, widely apart from each other, 77µm apart from each other, 30–32µm apart from anterior margin in holotype. Fore legs enlarged in large female; tarsal tooth wide based, stout in large female. Fore wing with 5–7 duplicated cilia, 5 in holotype; three sub-basal setae expanded; S3 the longest. Pelta ( Fig. 233 View FIGURES 227–235 ) relatively wide, trapezoid, 2.0 times as wide as long in holotype. Tergites III – VIII S2 setae: III – VI expanded, VII sharply pointed, VIII blunt. Tergite IX S1 setae blunt, shorter than tube, S2 on IX sharply pointed, almost as long as tube or a little shorter; intermediate setae longer than half of Sl. Tube ( Fig. 234 View FIGURES 227–235 ) shorter than 0.5 times as long as head, 0.45 times in holotype, 1.7–1.8 times as long as wide; terminal setae about 1.6 times as long as tube .

Measurements (holotype female (small–large paratype females) in µm). Body length 1740 (1540–1820) (distended). Head length 198 (188–212), from anterior margin of eyes 186 (176–198), width across eyes 141 (127– 141), maximum width across cheeks 150 (139–150), minimum width across base 117 (111–120); eyes length 55 (52–55); diameter of posterior ocelli 11–13 (10–13); postocular setae 22–23 (28–30). Antenna total length 325 (280–325), segments III–VIII length as follows: 45 (37–43), 41 (37–42), 41 (36–41), 40 (35–41), 40 (34–38), 29 (25–30). Pronotum length 147 (110–148), width 210 (183–222). Setae on prothorax: am? (13–15), aa about 20 (22–23), ml about 20 (23–25), pa 35 (25–?), epim?35 (28–30). Fore wing length 650 (530–, 35650). Sub-basal wing setae: S1 37 (28–?), S2 42 (30–34), S3 41 (35–43). Pelta length 60 (55–65), width 120 (100–123). Tergite IX setae: S1 78 (60–80), S2 83–90 (80–90). Tube length 90 (82–90), maximum width 52 (45–52); terminal setae 145 (130–145).

Male (macroptera). Distended body length: 1.2–1.5mm. Very similar to female in color and structure. Small male: head ( Fig. 230 View FIGURES 227–235 ) about 1.2 times as long as wide; maxillary stylets wider apart from each other, maxillary bridge relatively distinct, about 0.3 times as wide as head; pronotum shorter than 0.6 times as long as head, about 1.7 times as wide as long; fore tarsal tooth small. Large male: head ( Fig. 229 View FIGURES 227–235 ) about 1.4 times as long as wide; maxillary stylets closer together, maxillary bridge very weak, about 0.2 times as wide as head; pronotum enlarged, much longer than 0.6 times as long as head, less than 1.5 times as wide as long; fore leg enlarged, fore tarsal tooth stout; basantra a little longer than wide.

Measurements (paratype small–large males in µm). Body length 1230–1510 (distended). Head length 158– 202, from anterior margin of eyes 150–187, width across eyes 125–135, maximum width across cheeks 130–142, minimum width across base 100–106; eyes length 49–56; diameter of posterior ocelli 10–16; postocular setae 25–40. Maxillary bridge width 38–28. Antenna total length 270–315, segments III–VIII length as follows: 37–44, 35–40, 35–40, 35–41, 33–37, 25–27. Pronotum length 89–136, width 153–200. Setae on prothorax: am 15–20, aa 18–26, ml? –32, pa 22–35, epim 27–35. Fore wing length 470–630. Sub-basal wing setae: S1 30 –42, S2 35 –37, S3 35 –45. Pelta length 49–61, width 82–105. Tergite IX setae: S1 62–65, S2 20 –18. Tube length 78–85, maximum width 40–45; terminal setae 120–133.

Type material. Holotype: macropterous female, Peninsular Malaysia, Pahang, Endau-Rompin Park, fogging, Trees : K oompassia excelsa, Shoea leprosula, etc., 8.vii.2003, H. Kojima . Paratypes: Peninsular Malaysia, 17 females and 8 males, collected together with holotype .

Comments. This species may be included in the bamboosae -group, and peculiar in showing extreme allometric growth in both sexes. Allometric growth is commonly found in males in this genus, but it is not found in females in the other species. The large female has the prothorax and fore legs enlarged and the maxillary stylets close together at middle of the head capsule. Among small individuals, both females and males, pahangi is very similar to N. simulans sp. nov. from Thailand and Peninsular Malaysia and N. tonesai sp. nov. from Thailand described below. These species have the head somewhat long, the maxillary stylets long and relatively close together, and the tube relatively short. However, these three species can be distinguished by the sense cone formula. Antennal segments III and IV each have three sense cones, (1+2) and (1+2 +1), in pahamgi; each have two, (1+1) and (1 ++11), in simulans ; and three (1+2) and four (2+2 +1) in tonesai .