Karnyothrips breviceps, Okajima & Masumoto, 2025

Okajima, Shûji & Masumoto, Masami, 2025, Review of the genus Karnyothrips (Thysanoptera, Phlaeothripidae) from Asia between India and Japan, Zootaxa 5578 (1), pp. 1-82 : 24-26

Karnyothrips breviceps sp. n.

( Figs 14 , 62–67 )

Female (microptera). Distended body length: 2.0mm. Brown species ( Fig. 14 ). Abdomen somewhat paler than head, intermediate segments pale brown, scarcely yellowish before antecostal suture. All femora brown, with apices slightly yellowish; all tibiae weakly shaded with brown; tarsi yellow. Antenna brown, segments II and III a little paler, apex of segment II and base of III scarcely yellowish. Major body setae pale. Head relatively short ( Fig. 62 ), about 1.2 times as long as broad, widest across the middle of cheeks, dorsal surface almost smooth. Cheeks rounded, weakly serrate. Postocular setae a little shorter than eyes, expanded at apex, about 120µm apart from each other, 13–16µm apart from eyes. Eyes about 0.3 times as long as head. Ocelli relatively small, posterior pair 38µm apart from each other. Antennae about 1.8 times as long as head; segment VIII very weakly constricted basally ( Fig. 66 ), narrowly fused to VII, 0.55 times as long as VII; segments III shorter than IV ( Fig. 67 ), a little longer than VII; segments III and IV with two (1+1) and four (2+2) sense cones respectively. Maxillary stylets reaching postocular setae, not reaching eyes, relatively wider apart from each other, their distance about one-fourth of head width, 37µm apart; maxillary bridge weak. Pronotum 0.84 times as long as head, 1.36 times as wide as long, almost smooth; four pairs of prominent setae expanded; aa, ml and pa subequal in length, epim the longest. Notopleural sutures complete. Basantra wider than long; mesopresternum divided into two lateral triangle plates; prospinasternum not so large, fan-shaped, about 30µm wide ( Fig. 63 ). Metanotum almost smooth medially ( Fig. 64 ); median pair of setae weak, short and acute, longer than 20µm, 52µm apart from each other, 43–47µm apart from anterior margin. Pelta trapezoid ( Fig. 65 ), sculptured weakly, about 1.7 times as wide as long. Abdominal tergites II–VII each with two pairs of wing-retaining setae. Tergite IX S1 setae weakly expanded, almost as long as tube, S2 sharply pointed, much longer than tube. Tube 0.54 times as long as head, about 1.7 times as long as wide. Terminal setae about 2.0 times as long as tube.

Measurements (holotype female in µm). Body length about 2000 (distended). Head length 172, from anterior margin of eyes 161, width across eyes 141, maximum width across cheeks 147, minimum width across base 130; eyes length 51; diameter of posterior ocelli 9–10; postocular setae 43–48. Maxillary bridge width 40. Antenna total length 315, segments III–VIII length (width) as follows: 42 (27), 45 (28), 42 (24), 36 (23), 40 (20), 22 (12). Pronotum length 145, width 197. Setae on prothorax: aa 37–42, ml 41–42, pa 42, epim 54–57. Pelta length 62, width 105. Tergite IX setae: S1 91–93, S2 130–133. Tube length 93, maximum width 55; terminal setae 190.

Male. Unknown.

Type material. Holotype: micropterous female, Taiwan, Nantou Hsien, Nanshanchi , on dead branches, 29.iii.1984, SO.

Comments. This species is described based on a single micropterous female taken from Taiwan. The head shape of this species is peculiar in the genus ( Fig. 62 ). It may be nearly allied with K. flavipes , but can be distinguished by having short head that is about 1.2 times as long as wide ( Fig. 62 ), the mesopresternum divided into two lateral plates ( Fig. 63 ), and antennal segment VIII weakly constricted at base ( Fig. 66 ). This species was collected from the dead branches.

Figures

FIGURES 6–20. Haplothrips and Karnyothrips species, female. (6) H. aculeatus; (7) H. chinensis; (8) H. gowdeyi; (9) H. pallescens; (10) H. robustus; (11) K. acutus sp. n., (mac.); (12) K. affinis sp. n., (mac.); (13) K. apoensis sp. n., (mac.); (14) K. breviceps sp. n., (mic.); (15) K. brevipilosus sp. n., (mac.); (16) K. capitatus sp. n., (mac.); (17) K. flavescens sp. n., (mic.); (18) K. flavipes, (mac.); (19) K. formosanus sp. n., (mac.); (20) K. infectus sp. n., (mac.).

FIGURES 62–67. Karnyothrips breviceps sp. n., female macroptera. (62) Head; (63) prosternum & mesopresternum; (64) meso- & metanotum; (65) pelta; (66) antennal segments VI–VIII; (67) antennal segments III–IV.