Karnyothrips micrommatus, Okajima & Masumoto, 2025

Karnyothrips micrommatus sp. n.

( Figs 28 View FIGURES 21–30 , 146–151 View FIGURES 146–151 )

Female (macroptera). Distended body length: 1.54mm. Brown species ( Fig. 28 View FIGURES 21–30 ). All femora brown, almost concolorous with head or a little paler; all tibiae yellowish, shaded with pale brown. Antennal segments I and VI– VIII brown, segment I slightly paler than head, segments II and III brownish yellow, segments IV and V brownish yellow to yellowish brown, gradually darkened distally. Fore wings scarcely shaded with pale brown; major body setae pale. Head 1.27 times as long as wide ( Fig. 146 View FIGURES 146–151 ), widest across cheeks at level of behind postocular setae, dorsal surface almost smooth. Cheeks rounded, serrate. Postocular setae longer than eyes, expanded at apex, about 93µm apart from each other, 13–15µm apart from eyes. Eyes small, about 0.23 times as long as head. Ocelli small, posterior pair 32µm apart from each other. Antennae about 1.9 times as long as head; segment VIII conical ( Fig. 150 View FIGURES 146–151 ), wide based, not constricted basally, widely fused to VII, about 0.6 times as long as VII; segments III and IV subequal in length ( Fig. 151 View FIGURES 146–151 ); segment VII the longest; segments III and IV with one (0+1) and two (1+1) sense cones respectively, sometimes segment III with two (1+1) sense cones, but inner sense cone very small. Maxillary stylets scarcely reaching eyes, their distance about 1/6 of head width, 20µm apart from each other; maxillary bridge weak. Pronotum about 0.77 times as long as head, 1.46 times as wide as long, almost smooth; four pairs of prominent setae expanded, relatively long; aa and ml subequal in length, epim the longest. Notopleural sutures complete. Basantra wider than long; mesopresternum reduced, divided into lateral two small triangle plates; prospinasternum largely developed, inverted triangle, more than 50µm in width ( Fig. 148 View FIGURES 146–151 ). Metanotum almost smooth; median pair of setae weak, short and acute, about 20µm, 52µm apart from each other, 35–38µm apart from anterior margin. Fore wing without duplicated cilia; two sub-basal setae, S1 and S2, developed and expanded, but S3 reduced or vestigial. Pelta much wider than long ( Fig. 149 View FIGURES 146–151 ), almost trapezoid with irregular lateral margins, sculptured weakly, 1.96 times as wide as long. Abdominal tergites II–VII each with only one pair of wing-retaining setae. Tergite IX S1 setae sharply pointed, much longer than tube, S2 sharply pointed, a little longer than S1. Tube 0.57 times as long as head, 1.69 times as long as wide. Terminal setae a little longer than 2.0 times as long as tube.

Measurements (holotype female in µm). Body length 1540 (distended). Head length 152, from anterior margin of eyes 144, width across eyes 113, maximum width across cheeks 120; eyes length 35; diameter of posterior ocelli 5–6; postocular setae 38–40. Maxillary bridge width 21. Antenna total length 290, segments III–VIII length (width) as follows: 37 (23), 38 (25), 38 (23), 35 (21), 43 (20), 26 (12). Pronotum length 117, width 171. Setae on prothorax: aa 35, ml?35, pa 40–42, epim 43–45. Fore wing length 600. Sub-basal wing setae: S1 35, S2 42 –43, S3 reduced. Pelta length 47, width 92. Tergite IX setae: S1 120–130, S2 130–135. Tube length 86, maximum width 51; terminal setae 182–185.

Female (microptera). Distended body length: 1.5–1.7mm. Very similar to macropterous female in color and structure. Abdominal tergites without wing-retaining setae.

Measurements (paratype micropterous female in µm). Body length 1530 (distended). Head length 171, from anterior margin of eyes 157, width across eyes 110, maximum width across cheeks 118; eyes length 42; diameter of posterior ocelli less than 3; postocular setae 43. Maxillary bridge width 23. Antenna total length 292, segments III–VIII length as follows: 35, 34, 35, 36, 42, 25. Pronotum length 121, width 168. Setae on prothorax: aa 40, ml 38, pa 43–45, epim 47. Pelta length 45, width 88. Tergite IX setae: S1 120–123, S2 138. Tube length 88, maximum width 52; terminal setae 183.

Male. Unknown.

Type material. Holotype: macropterous female, Peninsular Malaysia, Cameron Highland, Tanah Rata, on dead leaves and branches, 18.ix.1990, TN & SO . Paratypes: Peninsular Malaysia , 6 females (mic.), collected together with holotype ; 1 female (mic.), same locality as holotype, yellow pan trap, 15.iii.2006, T . Mita; 1 female (mic.), Cameron Highland, nr. Brinchang , on dead leaves and branches , 1 female (mic.), 25.viii.1990, 2 female (mic.), 27.viii.1990, TN & SO; 6 females (mic.), Cameron Highland, foot of Gnung Brinchang , on dead leaves and branches, 26.viii.1990 , TN & SO; 7 females (mic.), Cameron Highland, nr. Tanah Rata, Robinson water fall, on dead leaves and branches, 28.viii.1990 , TN & SO; 10 females (mic.), Cameon Highland, nr. Tanah Rata , on dead leaves and branches, 30.viii.1990 , TN & SO; 2 females (mic.), Cameron Highland (Path 3), Pahang, fogging, 15.vii.2003 , H. Kojima; Fraser’s Hill, on dead leaves and branches, 1 female (mic.), 13.ix.1990, 1 female (mic.), 14.ix.1990, TN & SO. Borneo, Sabah, about 3km N from Kundasang, 3 females (mic.), on dead leaves and branches, 6.ix.1990, 1 female (mic.), on moss, 7.ix.1990, TN & SO. Indonesia, Sulawesi , 4 females (mic.), 11km E from Malino, Kanreapia , alt. about 1500m, on dead branches, 2.viii.1984 , SO; 1 female (mic.), nr. Rantepao, Pedamaran , alt. about 1000m, on dead leaves and branches, 14.viii.1984 , SO. Indonesia, Bali, Tabanan, Bedugul , 1250m alt ., 1 female (mic.), on dead branches, 9.iii.2005, 3 females (mic.), habitat uncertain, 10.iii.2005, SO; 4 females (mic.), Tabanan, Bukit Catu, Mt. Pohen , 1430m alt., on dead leaves and branches, 10.iii.2005 , SO; Buleleng, Yehketipat ,, ca 1470m alt ., 20 females (mic.), habitat uncertain, 8.iii.2005, 1 female (mac.), on dead leaves and branches, 12.viii.2005, SO; 1 female (mac.), Tabanan, Soka , on dead branches, 13.viii.2005 , SO. The Philippines, Mindanao, Mt. Apo , Agko , alt. about 1300m , 1 female (mic.), on dead branches, 30.vii.1979, 1 female (mic.), on half dead grass, 31.vii.1979, SO.

Comments. This species is described based on three macropterous females and a good number of micropterous females collected from several Southeast Asian countries. It apparently resembles K. spinulus from the temperate area of Japan in having antennal segments III and IV with one (0+1) and two (1+1) sense cones respectively and the abdominal tergite IX S1 setae sharply pointed. However, micrommatus has the major setae on the head and prothorax distinctly expanded at apices and the terminal tube setae longer than 2.0 times as long as tube, whereas spinulus has the setae on the head and prothorax nearly pointed or blunt at apices, at least not distinctly expanded, and the terminal setae much shorter than 2.0 times as long as tube. Moreover, antennal segment III often has two (1+1) sense cones in micrommatus , with the inner one very small. From K. apoensis sp. n. from Mindanao, the Philippines, that has two (1+1) sense cones on antennal segments III and IV, and tergite IX S1 setae pointed, it can be distinguished by the longer tube and terminal setae and the wider apart maxillary stylets. Moreover, it is characteristic in having only the posterior pair of wing-retaining setae on tergites II–VII and no fore wing duplicated cilia in macropterae. Similar structures are found in K. yoshi from Japan, but these two are undoubtedly not closely related. This species was collected from dead leaves and branches in the mountainous area.