Phylladothrips trisetae, Dang & An & Okajima & Mound, 2023

Dang, Lihong, An, Yiyan, Okajima, Shuji & Mound, Laurence A., 2023, Taxonomic review of the Oriental genus Phylladothrips Priesner (Thysanoptera, Phlaeothripidae), ZooKeys 1185, pp. 241-253 : 241

Phylladothrips trisetae sp. nov.

Figs 9 , 11 , 16-17 , 21

Material examined.

Holotype, ♀ (SNUT), China, Xizang, Motuo County, on leaf-litter, 20.vii.2022, Y.Q. Li ; Paratypes, 1♀ 3♂ (SNUT), with the same data as holotype ; 1♀ 1♂ (ANIC), with the same data as holotype .

Description.

Holotype. Female macroptera. Body brown. All legs brown with tibiae yellow at extreme apices also all tarsi, fore and hind femora paler on apical 1/4. Antennal segments brown, with III-VI basal stems yellow (Fig. 11 ). Wings shaded with brown, body setae brown.

Head. Head inverted trapezoid, a little wider than length (Fig. 9 ); dorsal surface smooth with slightly transverse striae on basal third; eyes large, 0.4 times as long as head, postocular setae well developed, but shorter than eyes, expanded at apex (Fig. 9 ); cheeks narrowing to base. Mouth-cone rounded, maxillary stylets long, retracted to postocular setae, about one-fourth of head width apart, bridge stout (Fig. 9 ). Antennae 8-segmented, III-VI with basal stem, VIII not constricted at base, III with 1+2 sensoria, IV with 2+2, V-VI with 1+1 respectively, VII with one ventrally (Fig. 11 ).

Thorax. Pronotum smooth with weakly sculpture close to posterior margin, notopleural suture incomplete (Fig. 9 ); am and aa minute, ml, epim and pa setae developed, expanded at apex (Fig. 9 ), basantra present but weak; mesonotum with weak sculpture on front part, all setae minute, mesopresternum eroded medially, reduced to two lateral plates; metanotum smooth medially, with weak longitudinal reticulation laterally, three pairs of tiny setae on anterior angles, a pair of median setae slightly larger, pointed at apex (Fig. 16 ). Legs without fore tarsal tooth. Fore wings slender, weakly constricted medially, without duplicated cilia, three pairs of subbasal setae well developed, blunt at apex, S3 the longest (Fig. 17 ).

Abdomen. Pelta weakly reticulate, tall hat-shaped (Fig. 16 ); abdominal tergites II-VIII with two pairs of wing-retaining setae (Figs 16 , 21 ); S1-S3 on tergite IX shorter than tube, S1 shorter than S2, blunt at apex, S3 the shortest, pointed at apex, accessory setae between S1 and S2 elongate, but shorter than S1 (Fig. 21 ); tube about 0.6 times as long as head, anal setae much shorter than tube.

Measurements (holotype female in μm). Body length 1975. Head length 190, width just behind eyes 200, width at base 160; eye length 80, postocular setae length 60. Antenna length 435, segments I-VIII length (widest) 35(35), 45(30), 55(30), 70(30), 60(25), 60(20), 45(20) and 30(10), sensoria on segment III length 25. Fore wing length 860, subbasal setae length, S1 50, S2 60, S3 85. Pronotum length 125, width 255, length of pronotal setae, am 10, aa 10, ml 20, epim 65, pa 60. Pelta length 95, width at apex 50, width at base 125; tergite IX posteromarginal setae S1-S3, 90, 100, 80, accessorial setae length 55; tube length 130, basal width 65, apical width 40; anal setae length 80.

Male macroptera. Similar to female; abdominal tergite IX setae S2 longer than S1 (unusual among Phlaeothripinae , accessory setae between S1 and S2 elongate, but shorter than S1.

Measurements (paratype male in μm). Body length 1450. Head length 155, width just behind eyes 170, width at base 125; eye length 70, postocular setae length 50. Antenna length 350, segments I-VIII length (widest) 30(30), 40(20), 55(25), 65(25), 55(20), 50(15), 35(15) and 25(10), sensoria on segment III length 30. Fore wing length 660, subbasal setae length, S1 40, S2 50, S3 60. Pronotum length 95, width 200, length of pronotal setae, am 5, aa 5, ml 35, epim 55, pa 45. Pelta length 65, width at apex 40, width at base 90; tergite IX posteromarginal setae S1-S3, 75, 85, 80, accessorial setae length 40; tube length 100, basal width 50, apical width 25; anal setae length 55.

Etymology.

This species name is composed of two Latin words, tri and setae, based on its pronotum with three pairs of well-developed setae expanded at apex.

Comments.

This new species is similar to P. karnyi and P. niger in having the body uniformly brown, but it can easily be distinguished by having three pairs of well developed and expanded setae on the pronotum (Fig. 9 ). This condition also occurs in P. bispinosus , but it can be distinguished by the short and pointed postocellar setae (Fig. 9 ), in contrast to the long and expanded ones in P. bispinosus .

Figures

Figures 6 - 15. Phylladothrips species. Head and pronotum (6 - 9) 6 P. niger 7 P. selangor sp. nov. 8 P. pictus 9 P. trisetae sp. nov.; antennae (10 - 13) 10 P. pictus 11 P. trisetae sp. nov. 12 P. fasciae 13 P. selangor sp. nov.; pronotum (14) 14 P. fasciae; basantra and mesopresternum (15) 15 P. selangor sp. nov.

Figures 16 - 23. Phylladothrips species. P. trisetae sp. nov. (16, 17) 16 metanotum, pelta and tergite II 17 fore wing; P. fasciae (18 - 20) 18 pelta 19 sternites V-VI 20 pelta and tergites II-IV; tergites VII-X (21 - 23) 21 P. trisetae sp. nov. 22 P. fasciae 23 P. selangor sp. nov.