Asianthrips taiwanus Okajima & Masumoto 2022, sp. n.
Creators: name: Okajima, Shuji
name: Masumoto, Masami
Publisher: name: Zenodo
Year: 2022
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Thysanoptera
Phlaeothripidae
Asianthrips
Asianthrips taiwanus

description: Asianthrips taiwanus sp. n.
(Figs 26–27, 145–150)
Female macroptera. Body pale brown to brown (Fig. 26). Head darker at lateral and anterior portions. Abdominal segments somewhat paler; intermediate abdominal segments slightly paler at middle, darker at sides. Antennal segment III yellow; remaining segments uniformly brown, but segment IV very slightly yellowish at extreme base. All femora brown, with apices yellowish; tibiae and tarsi yellow, fore tibiae often weakly shaded with brown. Fore wings and prominent body setae almost colourless. Head (Fig. 145) a little wider than long, 0.94 times as long as wide in holotype; dorsal surface sculptured with transverse reticulation. Cheeks weakly incut behind eyes, weakly rounded, very weakly narrowed to base. Postocular setae almost as long as eyes or a little shorter. Postocellar setae shorter than a diameter of posterior ocellus. Eyes about 0.4 times as long as head, 0.39–0.41 times as long as head in holotype. Antennal segments VII and VIII broadly fused, segment VIII not constricted basally, cone-shaped (Fig. 147); segment III with three sense cones. Maxillary stylets rather short and V-shaped, retracted into 1/3 of head capsule; maxillary bridge weak. Mouth cone short and rounded. Pronotum (Fig. 145) 0.64 times as long as head, 2.07 times as wide as long in holotype; pa and epim subequal in length, a little longer than 1/2 of median pronotal length. Mesopresternum and mesoeusternum (Fig. 148) widely fused, with short sutures between them at both sides. Metanotum polygonally reticulated anteriorly, longitudinally reticulated posteriorly. Fore tarsal tooth absent. Fore wings with 5–5 duplicated cilia in holotype. Pelta bell-shaped. Tergites somewhat narrow, but tergites II to VI wider than pronotum. S1 and S2 setae on tergite IX subequal in length, S1 very weakly expanded, S2 blunt or nearly pointed at apex. Tube 0.61 times as long as head in holotype. Anal setae almost as long as tube or a little shorter.
Measurements. Female holotype (mac.) in microns. Distended body length 1550. Head length 148, width across cheeks 157. Compound eye dorsal length 58–60. Pronotum length 95, width 197. Fore wing length about 600. Tube length 90, width across base 50. Antenna length about 330, segments III–VIII length (width) as follows: 45 (26), 50 (27), 45 (23), 42 (22), 37 (19), 27 (15). Postocular setae 55–58. Pronotal aa 37–38, am 39–40, ml 45–46, pa 48–50, epim 50–51. S1 setae on tergite IX 62–63, S2 setae on tergite IX 60–62. Anal setae 87–88.
Female microptera. Colour very similar to macropterous female. Head (Fig. 146) almost as long as wide. Eyes small, 0.35–0.36times as long as head. Ocelli absent. Pronotum 0.69 times as long as head, 1.97 as wide as long. Metanotum wider than long, polygonally reticulated. Pelta (Fig. 146) trapezoid. Tergites without sigmoid wing retaining setae. S2 setae on tergite IX shorter than S1. Anal setae a little longer than tube.
Measurements. Male paratype (mic.) in microns. Distended body length 1580. Head length 144, width across cheeks 145. Compound eye dorsal length 50–52. Pronotum length 100, width 197. Fore wing length about 100. Tube length 88, width across base 48. Antenna length about 350, segments III–VIII length (width) as follows: 48 (28), 50 (27), 47 (25), 44 (24), 42 (20), 31 (15). Postocular setae 58–60. Pronotal aa 38–40, am 43–45, ml 52–55, pa 56–58, epim 55–56. S1 setae on tergite IX 73–75, S2 setae on tergite IX about 60. Anal setae 90–96.
Male microptera. Colour and structure very similar to micropterous female (Fig. 28), but body smaller and slender. Fore tarsal tooth absent.
Measurements. Male paratype (mic.) in microns. Distended body length 1170. Head length 124, width across cheeks 126. Compound eye dorsal length 42. Pronotum length 87, width 154. Fore wing length?. Tube length 74, width across base 44. Antenna length about 300, segments III–VIII length (width) as follows: 41 (27), 43 (27), 40 (25), 38 (22), 35 (19), 27 (14). Postocular setae 49–50. Pronotal aa 27–30, am 33–35, ml 38, pa 38–40, epim 40–42. S1 setae on tergite IX 60–65, S2 setae on tergite IX 30. Anal setae about 80.
Type series. Holotype female (mac.): Taiwan, Nantou-hsien, Nanshanchi, on dead leaves and branches, 29.viii.1993 (TN & SO). Paratypes: Taiwan, 2 females (mac.), collected with holotype; same locality as holotype, on dead branches, 1 male (mic.), 24.iii.1984, 1female (mic.), 25.iii.1984, 1 female (mic.), 27.iii.1984 (SO).
Non-paratypic specimens. Taiwan, 1female (mic.) and 1 male (mic.), Nantou-hsien, foot of Mt. Nankao, nr. Wanta, on dead branches, 1.iv.1984 (SO); 1 female (mac.), Tantung-hsien, Chihpen, on dead branches, 13.viii.1986 (SO).
Remarks. A. taiwanus may be related to A. orientalis from the Ryukyus, Southern Japan and Taiwan. However, it has shorter maxillary stylets that are retracted into the basal 1/3 of head capsule and V-shaped, whereas A. orientalis has longer stylets that are retracted into 1/2 of head and reaching postocular setae. Five specimens listed above as non-paratypic specimens could not be distinguished from this species but have some small differences.
description: Published as part of Okajima, Shuji & Masumoto, Masami, 2022, The genus Asianthrips an Oriental fungus-feeding phlaeothripine (Thysanoptera, Phlaeothripidae), pp. 101-138 in Zootaxa 5124 (2) on pages 134-136, DOI: 10.11646/zootaxa.5124.2.1, http://zenodo.org/record/6404864