Karnyothrips semiflavus Okajima & Masumoto, 2025, sp. n.
Creators: name: Okajima, Shûji
name: Masumoto, Masami
Publisher: name: Zenodo
Year: 2025
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Thysanoptera
Phlaeothripidae
Karnyothrips
Karnyothrips semiflavus

description: Karnyothrips semiflavus sp. n.
(Figs 33, 188–193)
Female (macroptera). Distended body length: about 1.9mm. Bicolored species (Fig. 33). Head and thorax yellow, but mesothorax tinged with pale brown laterally. Abdominal segment I yellowish with posterior and lateral portion brownish, segments II–IX and tube entirely brown. Legs largely yellow, almost concolorous with head. Antennal segments I–IV yellow, almost concolorous with head, but segment IV shaded with pale brown distally; segment V yellowish brown, with base yellowish, segment VI yellowish brown to brown, with pedicel yellowish, segments VII and VIII brown. Fore wings tinged with pale brown, with pale bases and apices; major body setae pale. Head about 1.5 times as long as wide (Fig. 188), widest at the level of postocular setae, dorsal surface almost smooth. Cheeks very weakly rounded, weakly serrate. Postocular setae shorter than eyes, expanded at apex, 113µm apart from each other, 15µm apart from eyes. Eyes about 0.3 times as long as head. Posterior pair of ocelli 30µm apart from each other. Antennae about 1.56 times as long as head; segment VIII relatively slender (Fig. 192), scarcely constricted basally, narrowly fused to segment VII, 0.73 times as long as VII; segment III longer than segment VII; segment IV the longest (Fig. 193); segments III and IV each with two sense cones, (1+1) and (1+1 +1) respectively. Maxillary stylets crossing over postocular setae, but scarcely reaching eyes, close together medially, their distance about one-fifth of head width, 27µm apart from each other; maxillary bridge rather distinct. Pronotum about 0.6 times as long as head, 1.46 times as wide as long, almost smooth; four pairs of prominent setae expanded; aa, ml and pa subequal in length, epim the longest, longer than postoculars. Notopleural sutures incomplete, but nearly complete. Basantra wider than long; mesopresternum divided into two lateral triangle plates; prospinasternum relatively small, fan-shaped, 30µm wide (Fig. 190). Metanotum almost smooth, but very weakly sculptured medially with longitudinal striae; median pair of setae weak, short and acute, less than 20µm in length, 43µm apart from each other, 42–45µm apart from anterior margin. Fore wing with 4–5 duplicated cilia; three sub-basal setae expanded, S2 the shortest, S1 and S3 subequal in length. Pelta trapezoid (Fig. 191), but lateral margins irregularly emarginate, sculptured weakly, about 1.2 times as wide as long. Tergite IX S1 and S2 setae abdominal sharply pointed, S1 almost as long as tube, S2 a little shorter than tube. Tube 0.48 times as long as head, 1.82 times as long as wide. Terminal setae about 1.5 times as long as tube.
Measurements (holotype female in µm). Body length about 1900 (distended). Head length 208, from anterior margin of eyes 190, width across eyes 135, maximum width across cheeks 138, minimum width across base 110; eyes length 62–63; diameter of posterior ocelli 12–15; postocular setae 40. Maxillary bridge width 30. Antenna total length 325, segments III–VIII length (width) as follows: 45 (27), 47 (28), 40 (25), 39 (22), 40 (21), 29 (12). Pronotum length 125, width 183. Setae on prothorax: aa 32, ml about 30, pa 30–31, epim 48–49. Fore wing length 700. Sub-basal wing setae: S1 30 –32, S2 about 20, S3 32. Pelta length 73, width 87. Tergite IX setae: S1 98–102, S2 92–93. Tube length 100, maximum width 55; terminal setae 150.
Male (macroptera). Distended body length: about 1.3mm. Very similar to macropterous female in color and structure. Head 1.36 times as long as wide (Fig. 189); maxillary stylets wider apart, a little wider than 1/4 of head width.
Measurements (paratype male in µm). Body length 1320 (distended). Head length 167, from anterior margin of eyes 155, width across eyes 118, maximum width across cheeks 123, minimum width across base 100; eyes length 54; diameter of posterior ocelli 8–9; postocular setae 33. Maxillary bridge width 35. Antenna total length 290, segments III–VIII length as follows: 42, 43, 38, 35, 37, 27. Pronotum length 107, width 152. Setae on prothorax: aa?20, ml?20, pa 30, epim 38–40. Fore wing length 560. Sub-basal wing setae: S1 25, S2?20, S3 27 –28. Pelta length 57, width 67. Tergite IX setae: S1 80, S2 30. Tube length 80, maximum width 47; terminal setae 120–130.
Type material. Holotype: macropterous female, the Philippines, Luzon, Quezon National Forest Park, on dead leaves, 22.viii.1979, SO. Paratype: the Philippines, Luzon, 1 male (mac.), collected together with holotype.
Comments. This species is described based on one female and one male macropterae taken from dead leaves in Luzon, the Philippines. It is easily distinguished from the congeners by the body color. The head and thorax are largely yellowish, in contrast with brown abdomen. This species has the prosternal basantra and ferna slightly closer than those of typical Karnyothrips species, and it is somewhat intermediate between Karnyothrips and Mesandrothrips (in part).
description: Published as part of Okajima, Shûji & Masumoto, Masami, 2025, Review of the genus Karnyothrips (Thysanoptera, Phlaeothripidae) from Asia between India and Japan, pp. 1-82 in Zootaxa 5578 (1) on pages 62-64, DOI: 10.11646/zootaxa.5578.1.1, http://zenodo.org/record/14763175