Asianthrips parvinotus, Okajima & Masumoto, 2022

Okajima, Shuji & Masumoto, Masami, 2022, The genus Asianthrips an Oriental fungus-feeding phlaeothripine (Thysanoptera, Phlaeothripidae), Zootaxa 5124 (2), pp. 101-138 : 128-130

Asianthrips parvinotus sp. n.

( Figs 21–22 , 117–123 )

Female macroptera. Body brown ( Fig. 21 ). Antennal segment III yellow, often shaded with pale brown, remaining segments uniformly brown. All femora brown, concolourous with body, with extreme apices yellowish; all tibiae and tarsi yellow. Fore wings weakly shaded with brown at basal half. Body setae almost colourless. Head ( Fig. 117 ) longer than wide, about 1.1 times as long as wide in holotype; dorsal surface generally sculptured with transverse reticulation, but ocellar triangle with very weak polygonal reticulation. Cheeks very weakly rounded, weakly narrowed to base, but they are almost straight and parallel-sided in compressed specimens. Postocular setae almost as long as eyes or a little shorter. Postocellar setae almost as long as a diameter of posterior ocellus. Eyes well developed, 0.43 times as long as head in holotype. Antennal segments VII and VIII somewhat broadly fused, but VIII not constricted basally, cone-shaped ( Fig. 119 ); segment III with three sense cones. Maxillary stylets almost reaching postocular setae, rather wide apart, a little wider than 1/3 of the head width apart at the basal collar of head. Pronotum ( Fig. 117 ) 0.58 times as long as head and 2.16 times as wide as long in holotype; pa about 3/4 of the median pronotal length. Metanotum ( Fig. 117 ) polygonally reticulated anteriorly, longitudinally reticulated posteriorly. Prospinasternum rather small. Mesopresternum and mesoeusternum ( Fig. 120 ) widely fused medially, with very short sutures between them at both sides. Fore tarsi unarmed. Fore wings with 6–7 duplicated cilia in holotype. Tergites rather small, especially tergites III–V very narrow ( Fig. 121 ), much narrower than sternites, narrower than pronotum. S1 and S2 setae on tergite IX subequal in length, about 3/4 the length of tube, S1 weakly expanded, S2 very weakly expanded or nearly pointed at apex. Tube ( Fig. 123 ) about 0.6 times as long as head. Anal setae shorter than tube.

Measurements. Female holotype (mac.) in microns. Distended body length 1825. Head length 175, width across cheeks 159. Compound eye dorsal length about 75. Pronotum length 106, width 218. Abdominal tergite IV median width 205. Fore wing length about 750. Tube length 106, width across base 55. Antenna length about 400, segments III–VIII length (width) as follows: 58 (29), 65 (27), 57 (25), 53 (22), 47 (19), 35 (12). Postocular setae 72–74. Pronotal aa 50–52, am 56–58, ml 64–70, pa 75–78, epim 60–64. S1 setae on tergite IX 78–80, S2 setae on tergite IX 78–82. Anal setae 90–92.

Male macroptera. Very similar in colour and structure to macropterous female ( Fig. 22 ), except for the followings: Body smaller; pronotal posteroangular setae not so long, almost as long as epimerals; fore wing with 5–6 duplicated cilia; S1 setae on tergite IX 0.83–0.89 times as long as tube, S2 setae short and pointed; tube 0.56 times as long as head. Fore tarsi unarmed.

Measurements. Male paratype (mac.) in microns. Distended body length about 1500. Head length 162, width across cheeks 152. Compound eye dorsal length 68. Pronotum length 88, width 205. Abdominal tergite IV median width 184. Fore wing length about 690. Tube length 90, width across base 47. Antenna length 375, segments III– VIII length (width) as follows: 55 (28), 58 (26), 52 (24), 52 (22), 43 (20), 30 (12). Postocular setae 62–63. Pronotal aa 39–40, am 45–47, ml 52–53, pa 52–53, epim 50–54. S1 setae on tergite IX 75–80, S2 setae on tergite IX 30–32. Anal setae 80–82.

Type series. Holotype female (mac.): Peninsular Malaysia, Cameron Highland, foot of Gnung Jasar, on dead leaves and branches, 29.viii.1990 (TN & SO) . Paratypes: Peninsular Malysia, Cameron Highland, 8 females and 2 males (mac.), collected with holotype, 1 female (mac.), foot of Gunung Brinchang, 26.viii.1990, 1 male (mac.), nr. Brinchang, 27.viii.1990 (TN & SO) .

Non-paratypic specimens. Borneo, Sabah, about 3km N from Kundasang, 1 male (mac.) and 1 male (mic.), on dead leaves and branches, 8.ix.1990 (TN & SO); Indonesia, Bali Is., 2 females (mac.), Buleleng, Yahketipat, 8.iii.2005, Tabanan, Candikuning, 1 female (mac.), 26.vii.1984, 1 female (mac.) and 1 male (mac.), 11.iii.2005 (SO) .

Remarks. A. parvinotus is unique in having the abdominal tergites III to V reduced in breadth, and much narrower than their sternites. Similar condition of tergites is found in A. borneoensis , but it has only two sense cones on the antennal segment III, in spite of three in A. parvinotus .

Figures

FIGURES 11–22. Asianthrips species. A. magnus, 11–12; (11) Female (mac); (12) Female (mic). A. malayanus, 13–14; (13), Female (mac); (14) Non-paratypic female (mic). A. nobilis, 15–16; (15) Female (mac); (16) Female (mic). A. orientalis, 17–18; (17) Female (mac); (18) Male (mic). A. pallens, 19–20; (19) Female (mac); (20) Male (mic). A. parvinotus, 21–22; (21) Female (mac); (22) Male, non-paratype (mic).

FIGURES 117–123. Asianthrips parvinotus, sp. n. (117) Head–pelta (female, mac); (118) Head–tergite II (male non-paratype, mic); (119) Antenna (female, mac); (120) Basantra–mesopresternum (female, mac); (121) Tergite III (female, mac); (122) Tergite III (male, mic); (123) Tube (female, mac).