Karnyothrips capitatus, Okajima & Masumoto, 2025

Karnyothrips capitatus sp. n.

( Figs 16 View FIGURES 6–20 , 74–79 View FIGURES 74–79 )

Female (macroptera). Distended body length: 2.4mm. Bicolored species ( Fig. 16 View FIGURES 6–20 ). Head, prothorax, mesothorax and tube brown, mesothorax a little paler than prothorax; metathorax and abdominal segment I yellowish medially, brownish laterally, metathorax slightly shaded with brown antero-medially; abdominal segment II largely brownish, but yellowish postero-laterally, segments III–VI largely yellowish, shaded with brown medially, segments VII and VIII largely brownish, slightly yellowish marginally, segment IX pale brown. Fore femora brown almost concolorous with head, with apices yellowish, mid and hind femora brown, slightly paler than fore femora; tibiae yellow, fore tibiae scarcely shaded; tarsi yellow. Antennal segment I brown, segment II pale brown, yellowish apically, segment III yellow; segments IV–VIII pale brown to brown, gradually darkened distally, segment IV with base yellowish. Fore wing shaded with pale brown, but paler at base and apex; major body setae pale. Head about 1.46 times as long as wide ( Fig. 74 View FIGURES 74–79 ), dorsal surface almost smooth. Cheeks almost straight, very weakly rounded, weakly serrate. Postocular setae much shorter than eyes, expanded at apex, 105µm apart from each other, about 10µm apart from eyes. Eyes well developed, about 0.4 times as long as head. Ocelli largely developed; posterior pair in contact with eyes, about 20µm apart from each other. Antennae 1.68 times as long as head; segment VIII relatively slender ( Fig. 78 View FIGURES 74–79 ), distinctly constricted basally, narrowly fused to segment VII, about 0.7 times as long as VII; segment III longer than segment VII; segment IV the longest ( Fig. 79 View FIGURES 74–79 ); segments III and IV with three (1+2) and four (2+2 +1) sense cones respectively. Maxillary stylets scarcely reaching eyes, close together medially, their distance about one-sixth of head width, 25µm apart from each other; maxillary bridge weak. Pronotum about 0.76 times as long as head, 1.2 times as wide as long, almost smooth; four pairs of prominent setae expanded; aa a little longer than pa, longer than postocular setae; epim the longest. Notopleural sutures complete. Basantra relatively small; mesopresternum divided into two lateral triangle plates; prospinasternum wide, about 62µm wide ( Fig. 75 View FIGURES 74–79 ). Metanotum weakly sculptured medially with longitudinal striae or reticulation ( Fig. 76 View FIGURES 74–79 ); median pair of setae weak, short and acute, 23µm in length, 32µm apart from each other, 65µm apart from anterior margin. Fore wing with 8 duplicated cilia; three sub-basal setae expanded; S3 the longest. Pelta trapezoid ( Fig. 77 View FIGURES 74–79 ), sculptured weakly, a little longer than wide. Tergite IX S1 setae expanded, shorter than tube, S2 sharply pointed, a little longer than tube. Tube 0.53 times as long as head, 1.95 times as long as wide. Terminal setae about 2.0 times as long as tube.

Measurements (holotype female in µm). Body length 2360 (distended). Head length 227, from anterior margin of eyes 215, width across eyes 155, maximum width across cheeks 156, minimum width across base 130; eyes length 89; diameter of posterior ocelli 17–21; postocular setae?40. Maxillary bridge width 38. Antenna total length 382, segments III–VIII length (width) as follows: 51 (28), 55 (29), 48 (25), 43 (23), 45 (20), 32 (11). Pronotum length 173, width 210. Setae on prothorax: aa 55–57, ml 50–53, pa 50, epim 70–75. Fore wing length 1060. Sub-basal wing setae: S1 45 –50, S2 52, S3 62–65. Pelta length 104, width 100. Tergite IX setae: S1 91–92, S2 125–127. Tube length 121, maximum width 62; terminal setae 237–238.

Male. Unknown.

Type material. Holotype: macropterous female, Peninsular Malaysia, Cameron Highland, foot of Gnung Jasar, on dead leaves and branches, 19.ix.1990, TN & SO.

Comments. This bicolored species is described based on a unique macropterous female taken from dead leafy branches in Cameron Highland, Peninsular Malaysia, but it is very characteristic in several structures. It is easily discriminated from the congeners by the combination of the following character states: eyes well developed ( Fig. 74 View FIGURES 74–79 ), about 0.4 times as long as head; antennal segments III and IV with three (1+2) and four (2+2 +1) sense cones respectively; maxillary stylets closer together, about one-sixth of head width apart; pelta almost as long as wide. K. capitatus is possibly related to K. macrommatus sp. n. described below from Sulawesi, Indonesia, in sharing the compound eyes enlarged and the pelta rather elongated.