Karnyothrips longicaudus, Okajima & Masumoto, 2025

Karnyothrips longicaudus sp. n.

( Figs 23 View FIGURES 21–30 , 116–121 View FIGURES 116–121 )

Female (macroptera). Distended body length: 1.6–2.3mm. Brown species ( Fig. 23 View FIGURES 21–30 ). Largely brown, but posterior portion of metathorax and abdomen somewhat paler than head and thorax; extreme base of tube paler (more yellowish in teneral individual). All femora brown with extreme apices yellowish; tibiae yellow, tinged with pale brown; tarsi yellow. Antenna brown, segment III yellow, segments I–II and IV–VIII pale brown to brown, segment II a little paler than segment I, segments IV–VIII gradually darkened distally, segment IV with base scarcely paler. Wings and major body setae pale. Head about 1.5 times as long as wide ( Fig. 116 View FIGURES 116–121 ), 1.51 times in holotype, dorsal surface almost smooth. Cheeks very weakly rounded, serrate. Postocular setae shorter than eyes, expanded at apex, about 110µm apart from each other, 10–11µm apart from eyes in holotype. Eyes about 0.3 times as long as head, 0.31– 0.32 times in holotype. Ocelli relatively small; posterior pair 37µm apart from each other in holotype. Antennae about 1.6 times as long as head; segment VIII not constricted basally ( Fig. 120 View FIGURES 116–121 ), 0.60–0.63 times as long as VII; segment III scarcely narrowed basally ( Fig. 121 View FIGURES 116–121 ), a little longer than VII; segment IV the longest, a little longer than III; segments III and IV with two (1+1) and three (1+2 +1) sense cones respectively. Maxillary stylets reaching postocular setae, relatively wider apart, their distance a little wider than one-fourth of head width, 40µm apart from each other in holotype; maxillary bridge weak. Pronotum a little longer than 0.7 times as long as head, 1.23 times as wide as long in holotype, almost smooth; four pairs of prominent setae expanded; pa longer than aa, aa and ml subequal, epim the longest, almost as long as postoculars. Notopleural sutures complete. Basantra longer than wide; mesopresternum transverse, boat-shaped; prospinasternum relatively small, less than 25µm wide ( Fig. 118 View FIGURES 116–121 ). Metanotum almost smooth, but very weakly sculptured medially with longitudinal striae or reticules; median pair of setae weak, short and acute, about 20µm in length or shorter, 47µm apart from each other, 47µm apart from anterior margin. Fore wing with 3–7 duplicated cilia, 5–6 in holotype; three sub-basal setae expanded, S3 the longest. Pelta trapezoid ( Fig. 119 View FIGURES 116–121 ), sculptured weakly, a little longer than wide. Tergite IX S1 setae expanded, shorter than tube, S2 sharply pointed, much longer than tube. Tube thickened at base, about half as long as head, 1.83 times as long as wide in holotype. Terminal setae very long, much longer than 2.5 times as long as tube, 2.83 times in holotype.

Measurements (holotype female in µm). Body length 2120 (distended). Head length 208, from anterior margin of eyes 195, width across eyes 135, maximum width across cheeks 138; eyes length 65–66, width 35–37; diameter of posterior ocelli 10–12; postocular setae 53–55. Antenna total length 330, segments III–VIII length (width) as follows: 46 (26), 50 (28), 43 (23), 39 (22), 42 (21), 26 (12). Pronotum length 157, width 193. Setae on prothorax: aa about 40, ml about 40, pa 45–47, epim 53–55. Fore wing length 670. Sub-basal wing setae: S1 36 –37, S2 38, S3 40 –42. Pelta length 85, width 80. Tergite IX setae: S1 90, S2 165–175. Tube length 106, maximum width 58; terminal setae about 300.

Male (macroptera). Distended body length: 1.3–1.6mm. Very similar in color and structure to macropterous female. Maxillary stylets wider apart ( Fig. 117 View FIGURES 116–121 ), wider than 1/3 as wide as head. Metanotal sculpture a little stouter than that of female. Head about 1.4 times as long as wide. Fore wing with 3–5 duplicated cilia.

Measurements (paratype male in µm). Body length 1550 (distended). Head length 170, from anterior margin of eyes 158, width across eyes 123, maximum width across cheeks 123; eyes length 58–59, width 32–36; diameter of posterior ocelli 10–12; postocular setae 43–47. Antenna total length 315, segments III–VIII length as follows: 42, 42, 40, 35, 38, 25. Pronotum length 130, width 167. Setae on prothorax: aa 35, ml 33, pa 35–38, epim 45–50. Fore wing length 600. Sub-basal wing setae: S1 30 –31, S2 30 –31, S3 34 –38. Pelta length 65, width 67. Tergite IX setae: S1 80, S2 35. Tube length 100, maximum width 47; terminal setae 275–280.

Type material. Holotype: macropterous female, Peninsular Malaysia, about 20km N from Kuala Lumpur, Templer Park , on dead leaves and branches, 12.ix.1990, TN & SO . Paratypes: Peninsular Malaysia , 4 males (mac.), Tapah, on dead leaves, 30.vii.1976, SO; 2 females (mac.), same locality as holotype, on dead leaves, 13.viii.1990, TN & SO ; 1 female (mac.), NE 13km from Tapah, on dead leaves, 27.vii.1976, SO.

Non-paratypic specimens. Borneo, 1 female (mac.), Sabah, nr. Madai Cave , on dried twigs, 12.viii.1979, Y. Yoshikawa ; 1 female (mac.) and 1 male (mac.), Sabah, Jl. Kimanis, 15km from Kimanis , on dead leaves and branches, 9.ix.1990, TN & SO. Indonesia , Sulawesi, nr. Rantepao, Pedamaran , alt. about 1000m, on dead leaves and branches , 1 female (mac.), 9.viii.1984, 1female (mac.), 12.viii.1984, SO; 2 females (mac.), 15km W from Palopo, Battang , alt about 450m, on dead branches, 19.viii.1984, SO .

Comments. This species is described based on macropterous four females and four males collected from dead leafy branches in Peninsular Malaysia. It is somewhat similar to K. flavipes in having the same sense cone formula on antennal segments III and IV, and the transverse mesopresternum, but is peculiar in having very long terminal tube setae which are much more than 2.5 times as long as tube. Four females from Sulawesi and two females and one male from Borneo listed under the non-paratypic specimens may represent this species. Moreover, the prosternal basantra of this species are peculiar in shape, being a little longer than wide .