Neandrothrips subinermis, Okajima & Masumoto, 2025

Neandrothrips subinermis sp. nov.

( Figs 244 View FIGURES 236–245 , 282–289 View FIGURES 282–289 )

Female (macroptera). Distended body length: 1.5–1.7mm. Body brown ( Fig. 244 View FIGURES 236–245 ). Femora brown, with apices yellowish; fore and mid tibiae largely shaded with brown, with bases and apices paler, hind tibiae pale brown, with basal one-third yellowish. Antennal segments I and II brown; segments III – VIII pale brown to brown, gradually darkened distally. Fore wing pale, with base brownish. Major body setae pale. Head ( Fig. 282 View FIGURES 282–289 ) longer than wide, 1.30–1.38 times as long as wide, 1.36 times in holotype; dorsal surface very weakly sculptured with transverse striae at posterior half, but distinctly sculptured with transverse reticulation at near base, smooth at anterior half. Cheeks rounded, weakly serrated. Eyes well developed, about one-third of head length. Ocelli well developed; posterior pair scarcely separated from eyes, 21µm apart from each other in holotype. Postocular setae shorter than eyes, expanded; 90µm apart from each other, 12–13µm apart from eyes in holotype. Antennae ( Fig. 289 View FIGURES 282–289 ) about 1.8 times as long as head; segment VIII very weakly constricted at base, about 0.7 times as long as VII; segment III almost as long as segment IV, a little longer than VII; segments III and IV each with two sense cones, (1+1) and (1+1 +1) respectively. Maxillary stylets scarcely reaching postocular setae, wider apart, V-shaped; maxillary bridge rather distinct, a little wider than half of head width. Pronotum ( Fig.282 View FIGURES 282–289 ) about 0.6 times as long as head, 0.62 times in holotype, 1.5–1.6 times as wide as long; almost smooth; five pairs of prothoracic setae expanded, am almost as long as aa; epim well developed, much longer than postocular setae. Prospinasternum ( Fig. 283 View FIGURES 282–289 ) largely developed, widely fan-shaped, 38µm wide in holotype; mesopresternum complete. Mesonotal lateral setae expanded, 22µm long in holotype. Metanotum ( Fig. 284 View FIGURES 282–289 ) very weakly sculptured with polygonal reticulation; median pair of setae finely pointed, a little more than 20µm, their distance wider than distance between that seta and anterior margin of mesonotum, 45µm apart from each other, about 30µm apart from anterior margin in holotype. Fore tarsus unarmed ( Fig. 286 View FIGURES 282–289 ). Fore wing with 3–5 duplicated cilia; three sub-basal setae expanded, S3 the longest. Pelta ( Fig. 285 View FIGURES 282–289 ) trapezoid, with irregular lateral margins, sculptured weakly, about 1.4 times as wide as long in holotype. Tergites VI and VII S1 setae elongate, almost as long as S1 on tergite IX or longer. Tergites III – VIII S2 setae: VI expanded, VII finely pointed, VIII blunt or bluntly pointed. Tergite IX S1 setae blunt or bluntly pointed, much shorter than tube, S2 finely pointed, a little shorter than tube; intermediate setae about half of S1. Tube ( Fig. 288 View FIGURES 282–289 ) 0.53 times as long as head in holotype, 1.9 times as long as wide; terminal setae almost as long as tube or a little longer .

Measurements (holotype female in µm). Body length 1630 (distended). Head length 170, from anterior margin of eyes 151, width across eyes 118, maximum width across cheeks 125, minimum width across base 108; eyes length 56; diameter of posterior ocelli 10–13; postocular setae 35. Maxillary bridge width 66. Antenna total length 307, segments III–VIII length (width) as follows: 40 (24), 41 (26), 39 (23), 37 (21), 38 (19), 27 (11). Pronotum length 106, width 167. Setae on prothorax: am 23–24, aa?25, ml?, pa 30–33, epim 47–48. Fore wing length 620. Sub-basal wing setae: S1 28, S2?, S3 45. Pelta length 62, width 87. Tergite VIII setae: S1 about 80. Tergite IX setae: S1 68–73, S2 78–85. Tube length 90, maximum width 47; terminal setae 96.

Male (macroptera). Distended body length: 1.1–1.3mm. Very similar to macropterous female in color and structure, does not show allometric growth. Head 1.25–1.30 times as long as wide; eyes 0.34–0.38 times as long as head; maxillary bridge much wider than 1/2 of head width.

Measurements (paratype male in µm). Body length1270 (distended). Head length 149, from anterior margin of eyes 135, width across eyes 113, maximum width across cheeks 117, minimum width across base 101; eyes length 55; diameter of posterior ocelli 10–12; postocular setae 26–29. Maxillary bridge width 67. Antenna total length 287, segments III–VIII length as follows: 37, 38, 37, 35, 37, 27. Pronotum length 94, width 147. Setae on prothorax: am?15, aa?20, ml?20, pa 25, epim 40. Fore wing length 510. Sub-basal wing setae: S1 24 –28, S2 28 –29, S3 36 –38. Pelta length 54, width 64. Tergite IX setae: S1 55 –60, S2 22 –23. Tube length 70, maximum width 46; terminal setae 90.

Type material. Holotype: macropterous female, Indonesia, Bali, Tabanan, Bukit Catu, Mt. Pohen, 1430m alt., on dead leaves and branches, 10.iii.2005, SO. Paratypes: Indonesia, Bali, 26 females and 11 males, collected together with holotype; 20km NE from Gilimanuk, Banyu wedan (sea level), on dead branches, 2 females, 28.viii.1984, 3 females and 2 males, 29.viii.1984, SO; Kuta, (sea level) on dead leaves and branches, 7 females and 16 males, 23.viii.1984, 12 females and 7 males, 30.viii.1984, SO; 2 females, Belimbing, gall on Ficus with Gynaikothrips , 27.vii.1984, SO; 1 female, Candi Kuning, alt. about 1200m, on grass, 26.vii.1984, SO; 3 females and 1 male, Tabanan, Bedugul, 1250m alt., 7.iii.2005, 2 females and 1 male, SO, 1 female, T. Ishikawa; 5 females and 2 males, Buleleng, Yehketipat, 1410–1550m alt., 8.iii.2005, SO; 1 male, Tabanan, Bedugul, on dead branches, 9.iii.2005, SO; Tabanan, Bukit Catu, Mt. Pohen, 1430m alt., 4 females and 2 males, on Hibiscus sp. ( Malvaceae ), 1 male, habitat uncertain, 10.iii.2005, SO; 20 females and 6 males, Buleleng, Pancasari, (Lake Buyan), 1230m alt., on dead leaves and branches, 12.iii.2005, SO; 2 females and 1 male, Tabanan, Jatiluwih (Peteli Temple), 867–915m alt., on dead branches, 14.iii.2005, SO; 2 females and 3 males, Tabanan, Mayunganlet, 1100 alt., 11viii.2005, SO; 1 female and 6 males, Tabanan, Pakaranean, 1100m alt., 11.viii.2005, SO; 2 females and 3 males, Buleleng, Yehketipat, 1470m alt., 12.viii.2005, SO; 1 female and 1 male, Tabanan, Soka, 730m alt., on dead branches, 13.viii.2005, SO; Buleleng, Desa Melanting, 135m alt., 1 male, 30.viii.2005, 1 female and 3 males, 31.viii.2005, 1 female, on dead wood, 31.viii. 2005, SO; 1 female and 2 males, Buleleng, Pura Belatung, 100m alt., 30.viii.2005, SO; 5 females and 5 males, Buleleng, Penyabangan, Desa Buah, 190m alt., 31.viii.2005, SO; Buleleng, Belatung, 130m alt., 1 male, 15.viii.2006, 1 female, 17.viii.2006, 5 females and 1 male, on dead branches, 16.viii.2006, SO; Buleleng, Melanting, 150m alt., 1 female, 17.viii.2006, 7 females and 1 male, on dead branches, 16.viii.2006, SO.

Non-paratypic specimens. Indonesia, Java, 3 females and 1 male, Yogyakarta, Sleman, Margoluwh, Seyegan , 140m alt., 17.viii.2005, SO ; 2 females and 1 male, Yogyakarta, Gunung Kidul, Alas Bunder , 20.viii.2005, SO ; 2 females, Melang, Batu, Pujon , 975m alt., 22.viii.2005, SO ; 2 males, Malang, Tumpang , 690m alt., on dead leaves, 22.viii.2005, SO; Malang, Wono-koyo, 1150m alt ., 12 females and 2 males, on grass, 13 females and 2 males, habitat uncertain, 23.viii.2005, SO; 3 females and 2 males, Malang, Singo Sari , 570m alt., 23.viii.2005, SO; Malang, Sundeng, Sawo Sajar, 450m alt ., 2 females and 3 males, on bamboo, 1 female and 2 males, habitat uncertain, 24.viii.2005, SO; 1 male, Malang, Buring , 515m alt., on bamboo, 24.viii.2005, SO; Banyuwangi, Kalibaru, 470m alt ., 5 females and 3 males, on bamboo, 8 females and 3 males, habitat uncertain, 26.viii.2005, SO; 8 females and 4 males, Banyuwangi, Malan Sari , 410m alt., on bamboo, 27.viii.2005, SO ; 5 females and 1 male, Banyuwangi, Glemor, Tulung Rejo , Sumber Gondo , 300m alt., on dead branches, 27.viii.2005, SO .

Comments. This species is described from Bali, Indonesia, based on a long series of females and males, and included in the inermis -group together with N. inermis sp. nov. from Flores Is., Indonesia, and N. ommatoides sp. nov. from Thailand and Peninsular Malaysia. However, subinermis has two (1+1 +1) major sense cones on antennal segment IV, whereas inermis and ommatocellus have three (1+2 +1) major sense cones on that segment. The non-paratypic specimens listed above from Java may represent this species but have somewhat smaller bodies (1.3–1.5mm). Most of the specimens were taken from dead branches or bamboo, and two paratype females were collected from the leaf gall on a Ficus tree together with Gynaikothrips species. The feeding habit of this species remains uncertain.