Aeolothrips setosus, Masumoto & Okajima, 2019

Masumoto, Masami & Okajima, Shûji, 2019, Review of the Aeolothripidae (Thysanoptera) in Japan, Zootaxa 4564 (2), pp. 301-326 : 314-315

Aeolothrips setosus sp. n.

( Figs 8, 9 , 20 , 61–68 )

Female macroptera. Body largely yellowish white but meso-metanota slightly shaded, abdominal tergites III–VIII laterally shaded along antecostal line, shaded medially on posterior tergites, tergite IX shaded at mid-laterals, tergite X pale brown ( Fig. 8 ); sternites IV–VII with antecostal ridges dark; antennal segment I yellow, II shaded, III–VIII brown with pale base on III; fore wings with two separate pale brown bands at submedian and subdistal areas, vein not shaded on pale area, clavus shaded at basal half; all legs yellowish white ( Fig. 20 ); prominent body setae pale. Head 0.8–0.9 times as long as wide, arched at cheeks, sculptured with anastomosing striae on dorsal surface ( Fig. 61 ), ventrally with 16 pairs of setae between compound eyes, a pair of mid-lateral setae beside compound eyes slightly longer than median setae; paired interocellar setae stouter than lateral postocular setae but median postocular setae much longer and stouter than interocellar. Antennal segment III and IV with sensoria 0.3– 0.4 and 0.6 times as long as length of the segments, respectively, V with ventral sensorium having oval base, 1.1– 1.2 times as long as the combined length of VI–IX ( Fig. 62 ). Antennal segments I to IX ratio length/width as follows: 0.9, 2.3–2.5, 4.3–4.4, 3.2–3.3, 2.5–2.6, 0.8–0.9, 0.8–0.9, 1.0–1.1, 1.7–2.0. Pronotum 0.8–0.9 times as long as wide, sculptured, with about 70 discal setae and 1–3 pairs of posteromarginal setae distinctly longer and stouter than discal setae. Mesonotum with lateral setae subequal in length to or slightly longer than median pair of setae; anteromedian CPS present. Metascutum with transverse concave reticulation on posterior half and relatively equiangular reticulation on anterior half; CPS present ( Fig. 63 ). Abdominal tergites II–VIII weakly sculptured with anastomosing striae throughout ( Fig. 64 ); tergite I without posteromedian CPS; tergite IX with a minor seta between S1 setae; sternites III–VI each with 6, 6 (rarely 5), 6 (rarely 5), 7 or 8 posteromarginal setae and all setae arising at posterior margin, sternites III–VI with S4 setae arising at posterior margin, VII with two pairs of accessory setae near posterior margin between S1 and S2 setae, interval between S1 setae subequal in length to interval between S1 and S2 setae ( Fig. 65 ). Spermatheca weak and with no internal teeth ( Fig. 66 ).

Measurements (holotype female in microns). Body length 2050; head length 145, width 180, compound eye length 73, width 53; pronotal median length 158, width 195; metascutal median length 88; fore wing length 990, width at middle 110; abdominal tergite IX length 115, tergite X length 100; ovipositor length 430. Antennal segments I–IX length (width) as follows: 35 (38), 68 (28), 105 (24), 81 (25), 65 (25), 15 (19), 13 (16), 13 (13), 13 (6).

Male macroptera. Body colour similar to female ( Fig. 9 ) but slightly darker, pronotum with slightly shaded patches, meso- and metanota slightly shaded, abdominal tergite I shaded, with microtrichia scattered laterally ( Fig. 67 ), tergites II–VIII shaded along antecostal lines, tergites IX and X pale brown. Abdominal tergite IX without clasper and transverse ridge, S1 setae in front of S2 setae and wide apart each other ( Fig. 68 ).

Measurements (paratype male in microns). Body length 1500; head length 145, width 150, compound eye length 75, width 50; pronotal median length 125, width 150; metascutal median length 88; fore wing length 790, width at middle 100. Antennal segments I–IX length (width) as follows: 28 (33), 55 (25), 80 (21), 65 (23), 63 (23), 13 (18), 10 (15), 11 (10), 11 (6).

Specimens studied. Holotype female, JAPAN, Honshu, Kanagawa Pref., Yokohama City, Kanazawa-shizen kouen park, on leaves of Arachnoides standisii [ Aspidiaceae ], 2.iv.2006, M.Masumoto. Paratypes: 4 females collected together with holotype. Same place as holotype: 3 females on leaves of Arachnoides standisii , 25.iii.2006. 1 female on leaves of Carpinus tschnoskii [ Betulaceae ], 25.iii.2006. 2 females on leaves of Arachnoides standisii , 1.iv.2007. 1 female on flower of Prunus yedoensis [ Rosaceae ], 2.iv.2006. 19 females & 1 male on leaves of Arachnoides standisii , 24.iii.2018. 15 females on leaves of Arachnoides standisii , 31.iii.2018. Kanagawa Pref., Zushi City, Hayama City: 1 female on fern, 15.iv.2006. all M.Masumoto. The holotype and most paratypes are deposited in TUA.

Remarks. This new species is rather similar to A. gloriosus by yellowish body with brown markings, fore wing with two separate dark bands, yellow legs of female, some stout postocular setae and posteromarginal setae slightly stout, but it can be distinguished from the later species as follows: in setosus head uniformly yellow, intermediate abdominal tergites without large median brown markings, tergite IX largely yellow, mesonotum with median pair of setae subequal in length to lateral pair, male tergite IX with S1 setae small in front of S2 setae, whereas in gloriosus head with large median dark marking, intermediate abdominal tergites with large median dark markings, tergite IX dark brown, mesonotum with median pair of setae much shorter than lateral pair, male mid and hind tibiae brown at bases and tergite IX without S1 setae.

Etymology. In reference to stout setae on head and pronotum.

Figures

FIGURES 8–14. Aeolothripidae. A. setosus sp. n., 8–9: (8) Female; (9) Male. (10) Aeolothrips vittatus, female; (11) Desmidothrips japonicus sp. n., female; (12) Franklinothrips oblongus sp. n., female, (a: With KOH treatment; b: Without KOH treatment). F. vespiformis, 13–14: (13) Female; (14) Male.

FIGURES 15–24. Fore wings of Aeolothripidae, female. (15) Aeolothrips fasciatus; (16) A. fukushimensis sp. n.; (17) A. kurosawai; (18) A. luteolus; (19) A. melaleucus from Honshu; (20) A. setosus sp. n.; (21) A. vittatus; (22) Desmidothrips japonicus sp. n. (23) Franklinothrips oblongus sp. n.; (24) F. vespiformis.

FIGURES 61–66. Aeolothrips setosus sp. n., female. (61) Head & pronotum; (62) Antenna; (63) Mesonotum & metascutum; (64) Tergites VIII–X; (65) Sternites VI–VII; (66) Spermatheca, dorsal aspect.

FIGURES 67–73. Aeolothrips species. A. setosus sp. n., male, 67–68: (67) Tergite I; (68) Tergite IX. A. vittatus, female, 69– 73: (69) Head & pronotum; (70) Antennal segments III–IX; (71) Mesonotum & metascutum; (72) Sternite VII; (73) Spermatheca, dorsal aspect.