Karnyothrips similis, Okajima & Masumoto, 2025

Karnyothrips similis sp. n.

( Figs 34 View FIGURES 31–40 , 194–199 View FIGURES 194–199 )

Female (macroptera). Distended body length: 1.7–2.0mm. Bicolored species ( Fig. 34 View FIGURES 31–40 ). Head, thorax and tube brown; abdominal segments largely yellowish, segments I and II yellow, segment IX pale brown, segments III – VIII yellow shaded medially with pale brown, but each segment without median brown marking. All femora brown with apices yellowish; fore tibiae yellowish, tinged with pale brown, mid and hind tibiae yellow; tarsi yellow. Antennal segments I and II brown, segment II with apex yellowish, segment III yellow, segment IV pale brown with base yellowish, segments V – VIII brown, gradually darkened distally. Fore wings shaded with pale brown, with pale bases and apices; major body setae pale. Head about 1.4 times as long as wide ( Fig. 194 View FIGURES 194–199 ), widest at the level of postocular setae, dorsal surface almost smooth. Cheeks weakly rounded, weakly serrate. Postocular setae shorter than eyes, expanded at apex, about 100µm apart from each other, 15–16µm apart from eyes in holotype . Eyes about 0.3 times as long as head. Ocelli relatively small, posterior pair 33µm apart from each other in holotype. Antennae 1.62 times as long as head in holotype; segment VIII relatively slender ( Fig. 198 View FIGURES 194–199 ), scarcely constricted at base, narrowly fused to segment VII, about 0.7 times as long as VII; segments VII a little shorter than segment III; segment IV the longest ( Fig. 199 View FIGURES 194–199 ); segments III and IV with two (1+1) and four (2+2 +1) sense cones respectively. Maxillary stylets retracted to postocular setae, relatively wider apart, their distance a little wider than one-fourth of head width, 37µm apart from each other in holotype ; maxillary bridge rather distinct. Pronotum about 0.7 times as long as head, 0.66 times in holotype, 1.48 times as wide as long in holotype, almost smooth; four pairs of prominent setae expanded; aa, ml and pa subequal in length, shorter than postocular setae, epim the longest, a little longer than postoculars. Notopleural sutures complete. Basantra wider than long; mesopresternum divided into two lateral triangle plates; prospinasternum moderate in size, widely fan-shaped, 35µm wide in holotype ( Fig. 196 View FIGURES 194–199 ). Metanotum weakly sculptured medially with longitudinal striae or reticulation; median pair of setae weak, short and acute, about 20µm in length, 41µm apart from each other, 40–43µm apart from anterior margin in holotype. Fore wings with 5 duplicated cilia; three sub-basal setae expanded, S1 the shortest. Pelta trapezoid ( Fig. 197 View FIGURES 194–199 ), sculptured weakly, about 1.15 times as wide as long in holotype. Tergite IX S1 setae expanded, shorter than tube, S2 setae sharply pointed, longer than tube. Tube about 0.5 times as long as head, 1.86 times as long as wide in holotype . Terminal setae about 2.0 times as long as tube, about 1.97 times in holotype.

Measurements (holotype female in µm). Body length 1760 (distended). Head length 184, from anterior margin of eyes 170, width across eyes 125, maximum width across cheeks 132, minimum width across base 112; eyes length 57; diameter of posterior ocelli 10–11; postocular setae 40–42. Maxillary bridge width 37. Antenna total length 303, segments III–VIII length (width) as follows: 42 (27), 44 (29), 37 (24), 35 (22), 39 (21), 27 (11). Pronotum length 122, width 180. Setae on prothorax: aa 30–32, ml 32–34, pa 30, epim 45–48. Fore wing length 640. Sub-basal wing setae: S1 27, S2 30 –32, S3 29 –33. Pelta length 65, width 75. Tergite IX setae: S1 77–79, S2 113–118. Tube length 95, maximum width 51; terminal setae 183–187.

Male (macroptera). Distended body length: 1.5mm. Very similar to macropterous female in color and structure. Abdomen often tinged with pale brown. Head 1.45 times as long as wide ( Fig. 195 View FIGURES 194–199 ); maxillary stylets wider apart from each other, wider than 1/3 of head width. Fore wing with 4 duplicated cilia.

Measurements (paratype male in µm). Body length about 1500 (distended). Head length 178, from anterior margin of eyes 163, width across eyes 123, maximum width across cheeks 122, minimum width across base 100; eyes length 60; diameter of posterior ocelli 10–12; postocular setae about 30. Maxillary bridge width 48. Antenna total length 294, segments III–VIII length as follows: 39, 42, 37, 33, 27, 26. Pronotum length 118, width 158. Setae on prothorax: aa?20, ml?20, pa 32–33, epim 45–52. Fore wing length 600. Sub-basal wing setae: S1 30, S2 30 –32, S3 30 –35. Pelta length 60, width 70. Tergite IX setae: S1?65, S2 28 –30. Tube length?80, maximum width 48; terminal setae 180.

Type material. Holotype: macropterous female, the Philippines, Mindanao , Mt.Apo, Agko, alt. about 1300m, on dead leaves, 3.viii.1979, SO . Paratypes: the Philippines, Mindanao , same locality as holotype, 1 male (mac.), on dead branches, 30.vii.1979, 1 female (mac.) and 1 male (mac.), on dead fern, 30.vii.1979, 1 female (mac.) and 1 male (mac.), on dead leaves, 2.viii.1979, SO .

Doubtful-specimens. The Philippines, Luzon, 1 female (mac.) and 1 male (mac.), Bicol National Park , on dead branches, 13.viii.1979, SO .

Comments. This species is described based on three female and three male macropterae taken from dead plants in Mindanao , the Philippines. It is very similar to a sympatric species, K. variabilis sp. n., especially in coloration. However, it can be distinguished by the following features (in parentheses are the features of variabilis ): antennal segment II brown with apex yellowish (almost entirely yellowish); intermediate abdominal segments without median brown marking (segments III – VII each with a median brown marking); maxillary stylets wider than one-fourth of head width in female, wider than one-third of head width in male (narrower than one-fourth in female); prospinasternum less than 40µm in width (more than 50µm); pronotal aa setae much shorter than postocular setae (almost as long as postoculars, or a little shorter). Two specimens collected from Luzon Is. listed above as doubtful-specimens are very similar to similis , but have median brown markings on the intermediate abdominal segments and a smaller prospinasternum .