Thrips syringae, Masumoto & Okajima, 2013

Masumoto, Masami & Okajima, Shûji, 2013, Review of the genus <i> Thrips </ i> and related genera (Thysanoptera, Thripidae) from Japan, Zootaxa 3678 (1), pp. 1-65 : 52-54

Thrips syringae sp. n.

( Figs. 223–231 )

Female macroptera. Distended body length 1.3–1.7 mm. Body uniformly brown to dark brown; antennal segments I to VII almost uniformly brown, III to IV slightly paler or pale; fore wings ( Fig. 226 ) pale with middle and distal areas dark, clavus pale; all femora brown, all tibiae brown with apex slightly pale, all tarsi yellow; prominent body setae pale brown. Head ( Fig. 223 ) about 0.7 times as long as wide, sculptured with transverse anastomosing striae basal third dorsally and weakly sculptured within ocellar triangle, cheeks rounded. Ocellar setae III outside of or near margin of ocellar triangle. Postocular setae I slightly longer than remaining setae, II and IV very small. Antennae ( Fig. 224 ) 7-segmented, II without microtrichial rows; III (or VI) the longest, III and VI rounded at each side and distal fourth with weak neck, IV to V pedicelate, VI widest near base and tapering forward to apex, with 9 setae. Antennal segments I to VI length/width ratio as follows: 0.8–1.0, 1.3–1.5, 2.4–3.3, 2.3–2.6, 1.9–2.3, 2.6–2.9, 2.0–2.8. Pronotum ( Fig. 223 ) about 0.6 times as long as wide, weakly sculptured with transverse striae, with about 13–22 discal setae; anterior margin often with slightly long setae; posteroangular setae 2 pairs, setae I 0.6–0.8 times as long as pronotal median length and slightly longer or shorter than setae II; posteromarginal setae 2 pairs, often three at one side, setae I much longer than remaining setae. Mesonotum sculptured with narrow spaced transverse anastomosing striae; CPS absent anteromedially. Metascutum ( Fig. 225 ) weakly sculptured with circular striae or ill-formed reticulations medially; median pair of setae behind anterior margin, closer to each other than to submedian pairs, 0.4–0.6 times as long as metascutal median length; paired CPS usually present, sometime absent or one CPS present. Fore wing costal vein with 24–28 setae, first vein with long gap in setal row, seven (sometimes eight) basal and three distal setae, second vein with 10–13 setae. Abdominal tergites II to VIII ( Figs. 227, 228 ) with lines of sculpture reaching to S1 setae, a few lines across tergites anterior to S1 setae, often a few lines present between S1 setae on intermediate tergites; tergite II with 3 lateral marginal setae; tergite VIII with posteromarginal comb complete, but length of microtrichia often slightly short at middle; tergite IX with posterior pair of CPS only, S1, S2, S3 and MD setae each 1.3–1.5, 1.5–1.7, 1.4–1.7 and 0.6–0.8 times as long as median length of the tergite; tergite X with S1 and S2 setae each 1.4–1.8 and 1.4–1.7 times as long as median length of the tergite; sternite I without microsetae anteromedially; sternite II with two pairs of posteromarginal setae; sternites III to VI ( Fig. 229 ) with seven to eight discal setae arranged in irregular transverse row; sternite VII with S1 setae slightly (about twice as wide as diameter of setal base) far from posterior margin; pleurotergites with one to two discal setae and without ciliate microtrichia. Ovipositor 1.4–2.4 times as long as pronotal median length.

Measurements of holotype female. Distended body length 1490. Head length 104 (length including anterior prolongation 115), width across cheeks 153; compound eye dorsal length 64, width 39. Pronotal median length 115, width 190; posteroangular setae I length 72–80, setae II length 80–81; posteromarginal setae I length 28–30. Metascutal median length 75, median setae length 40–43. Fore wing length 810, width at middle 55. Abdominal tergite IX median length 80; S1 setae length 108–113, S2 setae length 122–123, S3 setae length 115–116, MD setae length 52–53; tergite X length 68; S1 setae length 105–106, S2 setae length 101–103. Ovipositor length 260. Antennal segments I to VII length/width as follows: 30 (28), 38 (28), 48 (20), 44 (18), 35 (18), 51 (19), 20 (8).

Male macroptera. Body length 1.0– 1.1 mm. Body almost uniformly white, but slightly shaded between compound eyes, and at anterior margin of mesonotum and metascutum; antennal segments I to II white, III to VII pale brown; fore wings pale with a brown band at middle and barely shaded distal area, clavus pale with extreme base barely shaded. Antennal segment VI with 13–16 setae. Abdominal tergite VIII without posteromarginal comb; tergite IX ( Fig. 230 ) with S1 setae at level of S2 setae and subequal to S2 setae, their bases equidistant; sternites without discal setae, III to IV ( Fig. 231 ) each with a small circular or oval pore plate, 9–20 microns wide; pleurotergites without discal setae.

Measurements of paratype males. Distended body length 950–1130. Head length 98–110 (length including anterior prolongation 100–113), width across cheeks 130–143; compound eye dorsal length 60–69, width 40–45. Pronotal median length 83–90 width 150–160; posteroangular setae I length 54–70, setae II length 53–68, posteromarginal setae I 20–25. Metascutal median length 60–63, median setae length 24–30. Fore wing length 630–670, width at middle 40–45. Antennal segments I to VII length (width) as follows: 20–25 (23–24), 30–33 (24– 25), 40–48 (16–20), 40–45 (18–19), 30–35 (16–18), 48–53 (15–18), 16–18 (6–8).

Type series. Holotype female, Japan, Hokkaido, Tomakomai City, Takaoka-shinrinkouen Park, on leaves of Syringa reticulate [ Oleaceae ], 27-ix-2004, T. Tsutsumi.

Paratypes: Hokkaido, 32 females & 14 males, same data as holotype. The holotype is deposited in TUA , and most paratypes are deposited in TUA and FU .

Non-paratypic specimen: Honshu: Yamanashi Pref., Fujiyoshida City, Fuji-rindou, nr. Mt. Fuji (alt about 1100m): 1 female on leaves of Prunus incise [ Rosaceae ], 24-vii-2001, M. Masumoto. 2 females (deciduous tree leaves), 1-vi-2002, M. Masumoto . Nagano Pref., Sugadaira , 31 females & 10 males on leaves of Ligustrum tschonoskii [ Oleaceae ], 6-ix-1998, T. Tsutsumi . Yamanashi Pref., Sutama-cho, Kanayama-daira, Yuzawa-rindou , 11 females (host unknown), 2-viii-2006, S. Okajima .

Comments. This species was referred to by Tsutsumi (1995: 30) as Thrips sp. 2 . It inhabits northern and mountainous areas of Japan, and is most closely related to T. nonakai described above. The non-paratypic specimens listed above are slightly shaded, at least not uniformly pale yellow, but are considered conspecific with the type specimens from Hokkaido, because neither the males nor females can be distinguished morphologically.

Figures

FIGURES 223–238. Thrips species. T. syringae sp. n., female. 223–229: (223) Head & pronotum, sculptured omitted at left side of pronotum; (224) Antenna, left; (225) Metascutum; (226) Fore wing, right; (227) Tergite V & pleurotergite, left side; (228) Tergite VIII, sculpture omitted at right side; (229) Sternites VI–VII, sculpture omitted at VII. T. syringae sp. n., male 230–231: (230) Tergite IX; (231) Sternites III–IV. T. tabaci, male 232–238: (232) Head & pronotum; (233) Antenna, right; (234) Mesonotum & metascutum; (235) Tergite V & pleurotergite, right side; (236) Tergites VIII–X, female. T. tabaci, male 237–238: (237) Tergites VIII–IX; (238) Sternite III & pore plates of IV–V.