Neandrothrips balianus, Okajima & Masumoto, 2025

Neandrothrips balianus sp. nov.

( Figs 106 View FIGURES 102–111 , 138–143 View FIGURES 138–143 )

Female (macroptera). Distended body length: 1.4–1.7mm. Body brown ( Fig. 106 View FIGURES 102–111 ). All femora brown, almost concolorous with head; fore and mid tibiae yellowish brown, with apices paler, hind tibiae yellow; tarsi yellow. Antennal segments I– II and VI – VIII brown; segment III yellow, segment IV pale brown, with basal one-third yellow; segment V yellowish brown, a little darker than segment IV, with bases paler. Fore wing scarcely tinged with pale brown at middle. Major body setae pale. Head ( Fig. 138 View FIGURES 138–143 ) longer than wide, about 1.2 times as long as wide, 1.23 times in holotype; dorsal surface almost smooth at middle. Cheeks subparallel, very weakly rounded, but constricted basally, weakly serrated. Eyes a little longer than one-third of head length, 0.36 times as long as head in holotype. Ocelli normal; posterior pair almost in contact with eyes, 23µm apart from each other in holotype. Postocular setae much shorter than eyes, expanded; 102µm apart from each other, about 10µm apart from eyes in holotype. Antennae ( Fig. 143 View FIGURES 138–143 ) longer than 1.8 times as long as head, 1.82 times in holotype; segment VIII weakly constricted at base, about 0.8 times as long as segment VII, 0.78 times in holotype; segments III almost as long as segment IV, much longer than VII; segments III and IV with two (1+1) and four (2+2 +1) sense cones respectively. Maxillary stylets retracted to the middle of head capsule, not reaching postocular setae, widely apart from each other, almost V-shaped. Maxillary bridge distinct, a little narrower than half of head width, 0.45 times as wide as head in holotype. Pronotum about 0.6 times as long as head, about 1.7 times as wide as long; almost smooth; five pairs of prothoracic setae expanded, pa almost as long as postocular setae. Prospinasternum ( Fig. 139 View FIGURES 138–143 ) fan-shaped, about 30µm wide in holotype; mesopresternum complete. Mesonotal lateral setae developed, expanded, about 19–20µm long in holotype. Metanotum ( Fig. 140 View FIGURES 138–143 ) sculptured with polygonal reticulation, but weak at middle; median pair of setae pointed, 20–27µm long, distance between both median setae a little narrower than distance between those setae and anterior margin of metanotum, 46µm apart from each other, 42µm apart from anterior margin in holotype. Fore tarsus ( Fig. 138 View FIGURES 138–143 ) with a tooth. Fore wing with 5–7 duplicated cilia, 7 in holotype; three sub-basal setae expanded, S1 and S2 subequal in length, S3 the longest. Pelta ( Fig. 141 View FIGURES 138–143 ) trapezoid with irregular lateral margins, 1.5 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 pointed, longer than S1, but shorter than tube; intermediate setae about two-thirds of Sl. Tube ( Fig. 142 View FIGURES 138–143 ) about 0.6 times as long as head, 0.59 times in holotype, about 2.2 times as long as wide; terminal setae about 1.5 times as long as tube .

Measurements (holotype female in µm). Body length 1620 (distended). Head length 177, from anterior margin of eyes 160, width across eyes 140, maximum width across cheeks 144, minimum width across base 115; eyes length 63; diameter of posterior ocelli 12–15; postocular setae about 30. Maxillary bridge width 65. Antenna total length 322, segments III–VIII length (width) as follows: 45 (23), 46 (25), 40 (23), 38 (20), 37 (18), 29 (11). Pronotum length 107, width 180. Setae on prothorax: am 23–25, aa?20, ml 28, pa 31–32, epim more than 30. Fore wing length 655. Sub-basal wing setae: S1 33 –34, S2 33, S3 53 –56. Pelta length 60, width 90. Tergite IX setae: S1 72, S2 93. Tube length 105, maximum width 48; terminal setae 160.

Male. Unknown.

Type material. Holotype: macropterous female, Indonesia, Bali, Tabanan, Jatiluwih, Peteli Temple , 915m alt., habitut uncertain, 13.viii.2006, SO . Paratypes: Indonesia, Bali, 1 female, Belimbing , alt. about 600m, on dead leaves and branches, 27.vii.1984, SO ; 1 female, Tabanan, Batu Sesa , 1270m alt., 14.viii.2005, SO ; 1 female, Tabanan, Muncak Sari, Pura Luhur , 780m alt., 2.ix.2005, SO ; 1 female, Tabanan, near Wangaya, Pura Jero Sasah , 900m alt., on bamboo, 4.ix.2005, SO ; 1 female, Tabanan, Bedugul, FIT trap, 14.vii.2005, T. Ishikawa .

Comments. This species is included in the pictipes -group, and can be discriminated from congeners by a combination of the following features: antennal segments III and IV with two (1+1) and four (2+2 +1) sense cones respectively; maxillary stylets wider apart, not reaching postocular setae; maxillary bridge 0.45 times as wide as head; metanotal median pair of setae more than 40µm apart from anterior margin of metanotum; postero-lateral setae S2 on tergites III–VI expanded; hind tibia clear yellow. Apparently, it is somewhat similar to N. boninae sp. nov. from the Ogasawara Islands, Japan, but boninae has antennal segment III with three sense cones, the hind tibiae largely brownish, and the prominent body setae very weakly expanded or almost truncated, at least not distinctly expanded.