Karnyothrips tenax, Okajima & Masumoto, 2025

Karnyothrips tenax sp. n.

( Figs 212–220 View FIGURES 212–220 )

Female (macroptera). Distended body length: about 2.3mm. Brown species ( Fig. 212 View FIGURES 212–220 ). Lateral and posterior portions of mesothorax somewhat paler; abdominal segment largely pale brown, each segment slightly darkened medially, base of tube paler. All femora brown with apices yellowish; all tibiae and tarsi yellow, but fore tibiae scarcely shaded. Antennal segments I and VI – VIII brown, segment I slightly paler than head, but segments IV – VIII almost concolorous with head; segment II brown, yellowish externally, segments III yellowish at basal half, brown at distal half. Wings and major body setae pale. Head about 1.45 times as long as wide ( Fig. 214 View FIGURES 212–220 ), dorsal surface almost smooth, but with fine transverse reticulation at base. Cheeks very weakly rounded, weakly serrate. Postocular setae shorter than eyes, expanded at apex, 128µm apart from each other, 14–15µm apart from eyes in holotype. Eyes well developed, about 0.36 times as long as head. Ocelli well developed; posterior pair 25µm apart from each other in holotype. Antennae about 1.76 times as long as head in holotype; segment VIII slender ( Fig. 219 View FIGURES 212–220 ), slightly constricted basally, narrowly fused to segment VII, 0.74 times as long as VII in holotype; segments III and IV subequal in length ( Fig. 220 View FIGURES 212–220 ), longer than segment VII, each with three (1+2) and four (2+2 +1) sense cones respectively. Maxillary stylets reaching postocular setae, relatively wider apart from each other, not close together medially, 50µm apart from each other at base in holotype; maxillary bridge weak. Pronotum about 0.64 times as long as head, about 1.5 times as wide as long in holotype, almost smooth; four pairs of prominent setae expanded; aa shorter than pa, epim the longest. Prospinasternum small, 17µm wide; mesopresternum not divided, narrowly boat-shaped. Metanotal median pair of setae weak, short and acute, a little more than 20µm in length, 52µm apart from each other, about 52–60µm apart from anterior margin in holotype. Fore femur slightly enlarged, with an inner sub-basal hump ( Fig. 217 View FIGURES 212–220 ); fore tibia with an inner apical tubercle or scale ( Fig. 218 View FIGURES 212–220 ); fore tarsus with a well developed inner hamus ( Fig. 218 View FIGURES 212–220 ). Fore wing with 8–9 duplicated cilia; three sub-basal setae expanded, S1 and S2 setae subequal in length, S3 the longest. Pelta sculptured weakly ( Fig. 216 View FIGURES 212–220 ), 1.08 times as wide as long in holotype. Tergite IX S1 setae expanded, shorter than tube, S2 setae sharply pointed, longer than tube. Tube 0.52 times as long as head, 1.95 times as long as wide. Terminal setae about 2.4 times as long as tube .

Measurements (holotype female in µm). Body length 2320 (distended). Head length 242, from anterior margin of eyes 225, width across eyes 167, maximum width across cheeks 167, minimum width across base 140; eyes length 88; diameter of posterior ocelli 18–21; postocular setae 55–62. Maxillary bridge width 70. Antenna total length 425, segments III–VIII length (width) as follows: 63 (33), 62 (32), 53 (27), 50 (24), 50 (22), 37 (13). Pronotum length 155, width 233. Setae on prothorax: aa?30, ml?35, pa 40, epim 65–68. Fore wing length 1020. Sub-basal wing setae: S1 33 –37, S2 35 –37, S3 55. Pelta length 95, width 103. Tergite IX setae: S1 115, S2 137–138. Tube length 125, maximum width 64; terminal setae about 300.

Male (macroptera). Distended body length: 2.2mm. Very similar to macropterous female in color and structure ( Fig. 213 View FIGURES 212–220 ). Pelta 1.22 times as wide as long. Tergite IX S1 setae pointed, longer than tube.

Measurements (paratype male in µm). Body length 2210 (distended). Head length 225, from anterior margin of eyes 205, width across eyes 155, maximum width across cheeks 157, minimum width across base 131; eyes length 80; diameter of posterior ocelli 16–18; postocular setae 55–57. Maxillary bridge width 68. Antenna total length 380, segments III–VIII length as follows: 58, 53, 48, 47, 43, 32. Pronotum length 157, width 223. Setae on prothorax: aa?30, ml?40, pa 40, epim 58–65. Fore wing length 940. Sub-basal wing setae: S1 35, S2 38 –42, S3 55 –60. Pelta length 90, width 110. Tergite IX setae: S1 135, S2 43 –48. Tube length 118, maximum width 66; terminal setae 280.

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 (mac.) and 3 males (mac.), Cameron Highland, nr. Tanah Rata , on dead leaves and branches, 30.viii.1990, TN & SO ; 3 females (mac.) and 6 males (mac.), collected together with holotype. Singapore , 1 male (mac.), Macritchie Res. , on dead branches, 8.viii.1990, TN & SO. Vietnam , 1 male (mac.), Lam Dong Province, Bao Loc, Dam Bri, 27.xii.2001, SO ; 1 male (mac.), Dong Nai Prov., Tan Phu , Phu An, on dead leaves and branches, 29.xii.2001, SO .

Comments. This species is peculiar in the genus in having a fore femoral sub-basal inner hump as well as a fore tibial sub-apical inner tooth or scale, and because of these it is somewhat similar to Androthrips species in appearance. From Androthrips , however, it can easily be distinguished by the prosternal basantra and ferna situated far apart from each other, with the membrane between them well developed with transverse dense striae ( Fig. 215 View FIGURES 212–220 ). Moreover, the terminal tube setae of tenax are much longer than twice as long as the tube. Glenothrips biuncinatus (Karny) from Java is also somewhat similar to this species in having a fore tibial sub-apical inner tooth, but it has the prosternal basantra and ferna close together (see Fig. 132 View FIGURES 128–133 in Dang et al. 2014).