Gigantothrips yunnanensis Dang & Mound, 2023

Dang, Lihong, Mound, Laurence & Zhang, Hongrui, 2023, Review of the genus Gigantothrips Zimmermann from China and Southeast Asia (Thysanoptera, Phlaeothripidae, Phlaeothripinae), ZooKeys 1169, pp. 221-234 : 221

Gigantothrips yunnanensis Dang & Mound sp. nov.

Figs 8 , 13 , 17 , 20 , 22 , 28 , 33

Material examined.

Holotype, ♀ (ANIC), China, Yunnan, Kunming Garden , on Ficus tikoua , 29.ix.2010, H.R. Zhang . Paratypes, 2♀ (ANIC), with the same data as holotype ; 1♀ 1♂ (ANIC), Yunnan, Kunming, Chenggong , on Ficus tikoua , 08.viii.2010, H.R. Zhang ; 1♀ (SUT), with the same data as holotype .

Description.

Holotype. Female macroptera. Body brown. All femora brown, fore tibiae clear yellow, mid and hind tibiae yellow with brown at basal third, all tarsi yellow. Antennae segments I-II brown with paler at extremely apices, III-V uniformly yellow, VI yellow with apices shaded, VII-VIII yellowish brown. Wings very weak shaded with brown, body setae yellowish.

Head. Head elongate, about 1.8 times as long as wide (Fig. 8 ); cheeks almost straight, each with 2-4 small setae, dorsal surface weakly sculptured with transverse striae; ocelli area prominent, a pair of postocellar setae as long as postocular setae; eyes about third of head length, two pairs of postocular setae stout and pointed at apex, longer than cheek setae (Fig. 8 ). Mouth-cone rounded, maxillary stylets rather short, not reaching the middle of head, close together. Antennal 8-segmented, intermedial segments elongate, III longer than IV, about 5 times as long as width, sensoria long and slender, III with 0+1, VI with 1+1 (Fig. 17 ).

Thorax. Pronotum sculptured with irregular striae and reticulation, notopleural suture complete; two pairs of pronotal setae well developed, blunt at apex, am, aa and pa small, ml stout and elongate, epim the longest (Fig. 13 ); mesonotum and metanotum reticulation with internal fine markings, a pair of relatively big setae located in front half of metanotum, three tiny setae around anterior angle (Fig. 20 ), mesopresternum boat-shaped, metathoracic sternopleural sutures absent. All legs slender, fore tarsal absent. Fore wings broad, with about 23 duplicated cilia, sub-basal setae almost equal length, slightly blunt at apex.

Abdomen. Pelta triangle and reticulate with internal markings, with a pair of campaniform sensilla and 1 pair of minute setae (Fig. 22 ); abdominal tergites II-VI with two pairs of major sigmoid wing-retaining setae, and 4-8 accessory slightly curved or straight setae; VII with about 8 small accessory setae laterally; S1-S3 on tergite IX short and pointed at apex, about 0.2 times as long as tube (Fig. 33 ); tube elongate with fine setae on the surface, 1.8 times as long as head, about 7.1 times as long as basal width, anal setae much shorter than tube; sternites II-VIII with some small setae not in lines.

Measurements (holotype female in microns). Body length 4850. Head length 430, width just behind eyes 235; eye length 120, postocular setae length S1 25, S2 30; postocellar setae length 35. Antenna length 1040, segments I-VIII length (widest) 60(50), 60(40), 215(40), 180(45), 170(45), 135(40), 100(30) and 70(15), sensoria on segment III length 60. Pronotum length 250, width 400, length of pronotal setae, am 20, aa 20, ml 40, epim 90, pa 25. Fore wing length 1700, sub-basal setae length, S1 80, S2 75, S3 100. Pelta length 150, basal width 290; tergite IX posteromarginal setae S1-S3, 155, 175, 130; tube length 780, basal width 110, apical width 60; anal setae length 195.

Male macroptera. Similar to female; but smaller, fore tarsal tooth absent; abdominal tergite IX setae S2 short; sternite VIII with a pore plate, its anterior margin like ‘W’ shape and posterior margin straight and before posterior marginal setae (Fig. 28 ), sternites III-VII without worm-shape pore plate.

Measurements (paratype male in microns). Body length 4610. Head length 415, width just behind eyes 195; eye length 125, postocular setae length S1 50, S2 35; postocellar setae length 40. Antenna length 1000, segments I-VIII length (widest) 60(50), 60(35), 210(35), 170(40), 170(40), 150(35), 95(25) and 70(15), sensoria on segment III length 55. Pronotum length 230, width 380, length of pronotal setae, am 25, aa 30, ml 70, epim 90, pa 30. Fore wing length 1600, sub-basal setae length, S1 70, S2 80, S3 60. Pelta length 135, basal width 215; tergite IX posteromarginal setae S1-S3, 150, 70, 140; tube length 740, basal width 110, apical width 55; anal setae length 200.

Etymology.

This species name is composed of one Latin word based on the location of type specimens.

Comments.

This new species was collected from leaves of Ficus tikoua , and it is similar in body colouration to G. nigrodentatus from Planchonia valida . It is also similar to G. tibetanus sp. nov. in body shape and pore plate on sternite VIII of male (Figs 28-29 ), but can be differentiated from both of them by having only two sense cones on antennal segment IV (Fig. 17 ). It is distinguished from G. nigrodentatus by the smaller body size, slender and yellow major body setae, and two pairs of major sigmoid wing-retaining setae on tergites II-V (in G. nigrodentatus large body size, major body setae stout and hyaline, and at least six pairs of major sigmoid wing-retaining setae on tergites II-V (Fig. 17 )). In contrast to G. tibetanus sp. nov. the mid and hind tibiae are bicolored, antennal segments III-V uniformly yellow, and fore wings pale (in G. tibetanus sp. nov. the mid and hind tibiae uniformly brown, antennal segments III-V yellow but shaded brown at apices, and fore wings strongly shaded brown).

Figures

Figures 7 - 14. Head and pronotum. Head (7 - 10) 7 G. nigrodentatus 8 G. yunnanensis sp. nov. 9 G. elegans 10 G. tibetanus sp. nov.; pronotum (11 - 14) 11 G. nigrodentatus 12 G. elegans 13 G. yunnanensis sp. nov. 14 G. tibetanus sp. nov.

Figures 15 - 25. Gigantothrips spp. Antennal segments III-IV (15 - 17) 15 G. elegans 16 G. tibetanus sp. nov. 17 G. yunnanensis sp. nov.; metanotum and pelta (18) 18 G. elegans; meso and metanotum (19, 20) 19 G. tibetanus sp. nov. 20 G. yunnanensis sp. nov.; pelta (21, 22) 21 G. tibetanus sp. nov. 22 G. yunnanensis sp. nov.; tegite IV (23, 24) 23 G. nigrodentatus 24 G. tibetanus sp. nov.; tegite III (25) 25 G. elegans.

Figures 26 - 33. Gigantothrips spp. Tergites VIII-IX (26, 27) 26 G. pontis 27 G. xynos; pore plate on male sternite VIII (28 - 30) 28 G. yunnanensis sp. nov. 29 G. tibetanus sp. nov. 30 G. nigrodentatus; right side of male sternite VII (31) 31 G. tibetanus sp. nov.; tergite IX and tube (32, 33) 32 G. tibetanus sp. nov. 33 G. yunnanensis sp. nov.