Apterygothrips flavescens Dang & Qiao, 2022

Dang, Lihong, Zhao, Linpeng, Li, Yanqiao & Qiao, Gexia, 2022, The genus Apterygothrips Priesner (Thysanoptera, Phlaeothripinae, Haplothripini) from China, with one new species, ZooKeys 1112, pp. 1-9 : 1

Apterygothrips flavescens Dang & Qiao sp. nov.

Figs 6-13 , 14-20

Material examined.

Holotype. ♀ (SUT), China, Tibet, Lhasa City, Lhasa Nanshan Park , from base of grass, 03.viii.2019, L.H. Dang and L.P. Zhao . Paratypes. 1♀ 3♂ (SUT), same data as holotype .

Diagnosis.

Apterous, body bicolored, with pterothorax yellow (Figs 14 , 15 ); major setae pointed at apex. Head longer than wide, postocular setae shorter than eye (Figs 6 , 7 ); pronotal am and ml minute, other three pairs of major setae well developed (Figs 6 , 7 ); mesopresternum reduced to two small, lateral triangular plates, completely eroded medially (Fig. 9 ); fore tarsal tooth absent (Figs 6 , 7 , 16 ); Pelta hemicircular (Figs 10 , 20 ); tergites II-VII without wing-retaining setae (Figs 11 , 19 ); tube shorter than head, anal setae slightly shorter than tube (Figs 12 , 13 , 17 , 18 ).

Description.

Holotype. Female aptera. Body bicolored (Fig. 14 ), head and abdominal segments II-X brown, meso-, metathorax and pelta pale yellow, prothorax brownish yellow, color between head and pterothorax. All legs yellow with outer margins brown. Antennal segments I-II and VIII brown, III yellow, IV-VII gradually yellow to brownish, VIII brown. Abdominal pelta yellow (Fig. 20 ), concolorous with pterothorax, segments II-X uniformly brown. Body setae hyaline.

Head. Head 1.6 times as long as wide (Figs 6 , 16 ); dorsal surface almost smooth; ocelli absent; eyes not prolonged ventrally, postocular setae well developed but shorter than eyes, pointed at apex (Figs 6 , 16 ); cheeks weakly rounded. Mouth-cone rounded, maxillary stylets retracted into postocular setae, about half of head width apart at middle (Fig. 16 ). Antenna 8-segmented, sensoria small, III with 0+1, VI with 1+1, V with 1+1 (Fig. 8 ).

Thorax. Pronotum almost smooth, notopleural sutures complete (Fig. 6 ); am and ml minute, other three pairs of major setae well developed, pointed at apex, epim the longest (Fig. 6 ); mesopresternum reduced to two small, lateral triangular plates, completely eroded medially (Fig. 9 ); metanotum smooth, metathoracic sternopleural sutures absent. All legs normal, without fore tarsal tooth (Figs 6 , 16 ).

Abdomen. Pelta smooth and hemicircular, with a pair of campaniform sensilla (Figs 10 , 20 ); abdominal tergites II-VII without wing-retaining setae (Figs 11 , 19 ); tergite IX setae developed, but all shorter than tube, pointed at apex (Fig. 12 ); tube about 0.5 times as long as head, 1.6 times as long as basal width, anal setae slightly shorter than tube (Fig. 17 ).

Measurements (holotype female in microns). Body length 1580. Head length 175, width across eyes 110; eye length 50, postocular setae length 35. Antenna length 265, segments I-VIII length (width) 25(30), 35(25), 35(20), 35(25), 35(20), 30(20), 25(20) and 20(10), sensoria on segment III length 10. Pronotum length 130, width 155, length of pronotal setae: am 5, aa 15, ml 5, epim 30, pa 25. Pelta length 65, width 125; tergite IX posteromarginal setae S1-S3, 65, 80, 75; tube length 80, basal width 50, apical width 30; anal setae length 75.

Male aptera. Very similar to female (Fig. 15 ), fore legs without fore tarsal tooth (Fig. 7 ); abdominal tergite IX setae S2 short and stout (Figs 13 , 18 ), sternites without a pore plate.

Measurements (paratype male in microns). Body length 1225. Head length 160, width across eyes 105; eye length 50, postocular setae length 30. Antenna length 250, segments I-VIII length (width): 25(25), 35(20), 30(20), 30(20), 30(20), 30(20), 25(20) and 20(10), sensoria on segment III length 10. Pronotum length 100, width 125, length of pronotal setae: am 5, aa 15, ml 5, epim 20, pa 10. Pelta length 45, width 95; tergite IX posteromarginal setae S1-S3, 70, 20, 85; tube length 75, basal width 50, apical width 25; anal setae length 75.

CO1 sequence.

It includes 1536 bp with the GenBank accession number ON350971.

Etymology.

The Latin name " Apterygothrips flavescens " refers to the yellow pterothorax of the new species.

Comments.

The new species, A. flavescens Dang & Qiao sp. nov., is similar to A. bicolor Johansen and A. dempax Bhatti & Ananthakrishnan in having a bicolored body. But it differs in having head and abdominal tergites II-X brown, pterothorax and pelta pale yellow, prothorax brownish yellow and intermediate in color between head and pterothorax, and major setae pointed at apex. In A. bicolor from Mexico, the head, prothorax, mesothorax and apical two thirds of the tube are brown, the metathorax, abdominal segments I-IX and the basal third of the tube are pale yellow, and the major setae are expanded at the apex (from original description, Johansen 1982). In A. dempax Bhatti & Ananthakrishnan from India, the body is almost yellow except for abdominal tergites IX-X or only the tube brown, and the major setae are expanded at the apex (from original description, Bhatti and Ananthakrishnan 1978).

Figures

Figures 6 - 13. Apterygothrips flavescens Dang & Qiao sp. nov. 6 head, pronotum and fore leg, female 7 head, pronotum and fore leg, male 8 antenna 9 mesopresternum 10 pelta 11 abdominal tergite V 12 abdominal tergites IX-X, female 13 abdominal tergites IX-X, male.

Figures 14 - 21. Apterygothrips spp. A. flavescens Dang & Qiao sp. nov. (14 - 20) 14 adult, female 15 adult, male 16 head, pronotum and fore legs 17 tergites IX-X, female 18 tergites IX-X, male 19 tergites V-VI 20 pelta; A. brunneicornus (21): 21 pelta. Scale bars: 100 μm.