Karnyothrips simpliceps, Okajima & Masumoto, 2025

Karnyothrips simpliceps sp. n.

( Figs 35 View FIGURES 31–40 , 200–205 View FIGURES 200–205 )

Female (macroptera). Distended body length: 1.7–2.0mm. Brown species ( Fig. 35 View FIGURES 31–40 ). Intermediate abdominal segments a little paler than head, anterior and posterior portions of each segment slightly paler. All femora brown, fore femora almost concolorous with head, mid and hind femora somewhat paler than fore femora; tibiae yellowish, slightly tinged with pale brown; tarsi yellow. Antennae largely brown, segments I and IV–VIII brown; segment II brown, slightly paler distally; segment III pale brown, with basal half yellowish. Fore wings slightly shaded with pale brown; major body setae pale. Head about 1.5 times as long as wide ( Fig. 200 View FIGURES 200–205 ), widest at the level of postocular setae, dorsal surface almost smooth. Cheeks very weakly rounded, weakly serrate. Postocular setae shorter than eyes, expanded at apex, 105µm apart from each other, 13–16µm apart from eyes in holotype. Eyes about 0.3 times as long as head. Ocelli small, posterior pair 32µm apart from each other in holotype. Antennae 1.6–1.7 times as long as head; segment VIII conical ( Fig. 204 View FIGURES 200–205 ), but scarcely constricted at extreme base, widely fused to segment VII, 0.61 times as long as VII in holotype; segments III and VII subequal in length ( Fig. 205 View FIGURES 200–205 ); segment IV the longest; segments III and IV with two (1+1) and three (1+2) sense cones respectively. Maxillary stylets crossing over postocular setae, but not reaching eyes, relatively wider apart, their distance 1/5 to 1/4 of head width, 27µm apart from each other in holotype; maxillary bridge weak. Pronotum about 0.7 times as long as head, 0.66 times in holotype, 1.35 times as wide as long in holotype, almost smooth; four pairs of prominent setae expanded; aa and ml subequal in length, pa a little longer than ml, epim the longest, longer than postoculars. Notopleural sutures complete. Basantra wider than long; mesopresternum divided into two lateral triangle plates; prospinasternum large, widely fan-shaped, 55µm wide ( Fig. 202 View FIGURES 200–205 ). Metanotum weakly sculptured medially with longitudinal striae or reticulation; median pair of setae weak, short and acute, about 20µm in length, 46µm apart from each other, 40–41µm apart from anterior margin in holotype. Fore wings with 4–5 duplicated cilia; three sub-basal setae expanded, S2 the shortest. Pelta trapezoid ( Fig. 203 View FIGURES 200–205 ), sculptured weakly, about 1.2 times as wide as long. Tergite IX S1 setae expanded, shorter than tube, S2 setae sharply pointed, much longer than tube. Tube 0.46–0.50 times as long as head, 1.66 times as long as wide in holotype. Terminal setae longer than 2.0 times as long as tube, about 2.46 times in holotype.

Measurements (holotype female in µm). Body length about 2000 (distended). Head length 190, from anterior margin of eyes 175, width across eyes 121, maximum width across cheeks 126, minimum width across base 104; eyes length 56–57; diameter of posterior ocelli 8–10; postocular setae about 40. Maxillary bridge width 27. Antenna total length 310, segments III–VIII length (width) as follows: 38 (26), 42 (27), 37 (23), 37 (21), 38 (20), 23 (12). Pronotum length 125, width 169. Setae on prothorax: aa 35–38, ml 35, pa 38–39, epim 51–52. Fore wing length 680. Sub-basal wing setae: S1 35 –37, S2 30 –34, S3 35 –40. Pelta length 70, width 85. Tergite IX setae: S1 81–83, S2 123–128. Tube length 88, maximum width 53; terminal setae 217.

Female (microptera). Distended body length: 1.6–1.9mm. Very similar to macropterous female in color. Head about 1.4 times as long as wide; antennae 1.7–1.8 times as long as head; maxillary stylets relatively wider apart, their distance about 1/4 of head width, 30–33µm apart from each other. Abdominal tergites II–VII each with two pairs of wing-retaining setae; tube a little longer than 1/2 of head length.

Measurements (paratype micropterous female in µm). Body length 1840 (distended). Head length 175, from anterior margin of eyes 168, width across eyes 121, maximum width across cheeks 125, minimum width across base 102; eyes length 51–52; diameter of posterior ocelli 9–10; postocular setae 37. Maxillary bridge width 37. Antenna total length 310, segments III–VIII length (width) as follows: 42 (24), 45 (27), 38 (23), 37 (22), 40 (22), 25 (13). Pronotum length 118, width 161. Setae on prothorax: aa 35, ml 35, pa 38, epim 50. Pelta length 65, width 73. Tergite IX setae: S1 70–78, S2 125. Tube length 95, maximum width 51; terminal setae 215–220.

Male (microptera). Distended body length: 1.2–1.6mm. Very similar to micropterous female in color and structure, but antennal segment II often somewhat paler, brownish yellow. Maxillary stylets wider apart ( Fig. 201 View FIGURES 200–205 ), about 1/3 of head width, or a little wider. Terminal tube setae often longer, often longer than 2.5 times as long as tube.

Measurements (paratype micropterous male in µm). Body length 1380 (distended). Head length 158, from anterior margin of eyes 146, width across eyes 102, maximum width across cheeks 107, minimum width across base 89; eyes length 45; diameter of posterior ocelli less than 5; postocular setae 40–45. Maxillary bridge width 38. Antenna total length 270, segments III–VIII length as follows: 33, 37, 34, 31, 32, 23. Pronotum length 100, width 140. Setae on prothorax: aa about 30, ml 30–33, pa 37–38, epim about 40. Pelta length 50, width 58. Tergite IX setae: S1 about 70, S2 31 –33. Tube length 70, maximum width 46; terminal setae 210.

Type material. Holotype: macropterous female, Peninsular Malaysia, Cameron Highland, Tanah Rata, on dead leaves and branches, 18.ix.1990, TN & SO . Paratypes: Peninsular Malaysia, Cameron Highland , 1 female (mac.), 2 females (mic.) and 3 males (mic.), collected together with holotype ; 1 female (mac.), Cameron Highland, foot of Gnung Jasar , on dead leaves and branches, 29.viii.1990, TN & SO ; 1 female (mac.) and 1 male (mic.), Tapah , on dead leaves and branches, 16.ix.1990, TN & SO ; 2 males (mic.), about 20km N from Kuala Lumpur, Templer Park , on dead leaves and branches, 12.ix.1990, TN & SO; Fraser’s Hill, on dead leaves and branches , 1 male (mac.), 13.ix.1990, 1 male (mic.), 14.ix.1990, TN & SO.

Doubtful-specimens. Peninsular Malaysia, 2 females (mic.) and 2 males (mic.), Cameron Highland, Tanah Rata , on dead leaves and branches, 18.ix.1990 , TN & SO. Indonesia, Bali, 3 males (mic.), Belimbing Sari , alt. about 70m, on dead branches, 29.vii.1984 , SO; 1 male (mac.), Tabanan, Muncak Sari, Pura Luhur , 755m alt., 3.ix.2006 , SO. Taiwan, Pintung Hsien, Kenting National Park , 1 fmeale (mic.), on dead branches, 18.iii.1984 , 1 female (mic.), 19.iii.1984, 1 female (mic.), on grass, 19.iii.1984, SO.

Comments. This species was collected from dead leafy branches in Peninsular Malaysia, and is distinguished from the congeners by the combination of the following character states: body uniformly brown; antennal segments III and IV with two (1+1) and three (1+2) sense cones respectively; prospinasternum large, usually wider than 50µm; mesopresternum divided into two lateral triangle plates; terminal tube setae much longer than 2.0 times as long as tube. The specimens listed above as doubtful-specimens are very similar to this species, but have several differences from the type series. Collected together with the type series, 2 females and 2 males from Tanah Rata have antennal segment II paler, the prospinasternum wider, and the mesopresternum reduced. From Bali Is., Indonesia, three males have antennal segment VII more slender. Finally , three females from Taiwan have antennal segment VIII more slender, the prospinasternum smaller, and the mesopresternum reduced .