Aeolothrips kurosawai Bhatti 1971
Creators: name: Masumoto, Masami
name: Okajima, Shûji
Publisher: name: Zenodo
Year: 2019
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Thysanoptera
Aeolothripidae
Aeolothrips
Aeolothrips kurosawai

description: Aeolothrips kurosawai Bhatti
(Figs 4, 5, 17, 40–49)
Aeolothrips kurosawai Bhatti, 1971: 85. Nom. nov. for conjunctus Kurosawa, 1968: 11; preoccupied by Priesner, 1914: 187.
Female macroptera. Body length 2.1–2.2 mm. Body uniformly dark brown (Fig. 4); antennal segments I and IV brown, II brown with apex slightly pale, III yellowish white with brown extreme apex; fore wings with two dark bands connected along posterior margin, dark area between the two bands not reaching to second vein, apex white, extreme base slightly shaded, vein not shaded on pale area (Fig. 17); all legs dark brown; prominent body setae brown. Head about 1.1 times as long as wide, weakly arched at cheeks, sculptured with narrowly spaced anastomosing striae on dorsal surface, almost smooth within ocellar triangle (Fig. 40), ventrally with 12 pairs of setae between compound eyes, a pair of mid-lateral setae beside compound eyes very long; interocellar setae slightly stouter than postocular setae. Antennal segment III and IV with sensoria elongate, 0.4 and 0.4 times as long as length of the segment respectively, V with ventral sensorium having circular base, 0.8–0.9 times as long as combined length of VI–IX (Fig. 41). Antennal segments I–IX ratio length/width as follows: 0.1–1.6, 2.0–2.1, 5.6– 5.7, 3.6–4.0, 3.1–3.3, 1.8–1.9, 1.4–1.5, 1.3–1.4, 1.7–2.0. Pronotum 0.8–0.9 times as long as wide, sculptured at each side and posteriorly, weakly sculptured medially, with no long and stout setae. Mesonotum with lateral setae much longer and stouter than median pair of setae; anteromedian CPS present. Metascutum with somewhat longitudinal reticulations medially; CPS present (Fig. 42). Abdominal tergites II–VIII almost smooth medially and with very weak sculpture laterally (Fig. 43); tergite I with or without posteromedian CPS; tergite IX usually with a minor seta between S1 setae; sternite II with all setae anterior to posterior margin, sternites III–VII with S1 and S2 setae at posterior margin, S3 and S4 setae anterior to posterior margin, VII with two pairs of accessory setae anterior to posterior margin between S1 and S2 setae, interval between S1 setae much wider than interval between S1 and S2 setae (Fig. 44). Spermatheca with several distinct internal teeth at each side (Fig. 45).
Male macroptera. Body colour very similar to female (Fig. 5) but smaller. Mid coxae each with transverse ridges and a large tooth-like tubercle ventrally (Fig. 46). Abdominal tergites III–VI with paired small posteromarginal tubercles, tubercles vestigial on VI (Fig. 48); tergite IX with bifurcate claspers, S1 setae far from each other and subequal in length to S2 setae, and these setae arranged almost in transverse row, S3 setae much shorter than clasper, ventrolateral setae stout and strongly curved (Fig. 49).
Specimens studied. Holotype female of A. conjunctus, Hokkaido, Kotoni, on oats leaf, 23.viii.1950, M.Kurosawa (NARO). Paratypes: 2 females mounted together with holotype on single slide & 1 male, collected together with holotype (NARO). Other specimens: JAPAN: Honshu, Aomori Pref., Hachinohe City: 1 female on Artemisia princeps [Compositae], 7.viii.1997, T.Tsutsumi (FU). 1 female on Miscanthus sinensis [Poaceae], 7.viii.1997, T.Tsutsumi (FU). Akita Pref., Honjou City, lower reaches of Koyoshi-gawa River, 3 females & 1 male on grass, 9.vii.1988, S.Okajima (TUA). Miyagi Pref., Mt. Zao, 2 females on sweeping, 11.vi.1976, S.Okajima (TUA). Yamagata Pref., Yamagata City, Zao, Mt. Torikabuto-yama, 3 females on Poaceae, 24.viii.2012, M.Masumoto (TUA). Fukushima Pref., Fukushima City, Mt. Issaikyo-yama (alt. 1850m), 1 female on Poaceae, 21.vii.2013, T.Tsutsumi (FU). Ibaraki Pref., Tsukuba-mirai City, side of the river Kokai-gawa: 5 females on Poaceae, 25.vii.2008, M.Masumoto (TUA). 11 females on Poaceae, 29.vii.2008, M.Masumoto (TUA). Chiba Pref.: Urayasu City, Irifune, 1 female, 19.x.1993, T.Nonaka & S.Okajima (TUA). Shibayama-cho, 12 females on Poaceae, 31.v.2015, M.Masumoto (TUA). Tokyo, Koremasa, 2 females on sweeping, 1.ix.1976, S.Okajima (TUA). Kanagawa Pref., Noborito, 12 females on sweeping, 31.v.1972, S.Okajima (TUA). Kanagawa Pref., Kawasaki City: 8 females & 1 male on Poaceae, 7.vi.2007, M.Masumoto (TUA). 6 females on Imperata cylindrica [Poaceae], 7.vi.2007, M.Masumoto (TUA). Kanagawa Pref., Yokohama City, Kanazawa-ku, Namiki: 1 female on Lolium multiflorum [Poaceae], 9.vi.2007, M. Masumoto (TUA). 1 female on Lolium multiflorum, 10.vi.2007, M. Masumoto (TUA). Yamanashi, nr. Fujiyoshia, 2 females on grass, 30.vii.1981, S.Okajima (TUA). Yamanashi, Kitakoma-gun, Sudama-cho, Kanayama, 6 females on grass, 8.vii.1994, S.Okajima (TUA). Ryukyus, Okinawa Pref., Ishigaki-jima Is., Takeda-rindou, 1 female, 16-i-1991, S.Okajima (TUA). TAIWAN: Nantou-hsien, nr. Meifeng, alt. about 1700m, 61 female & 1 male on grass, 4.iv.1993, H.Urushihara & S. Okajima (TUA).
Remarks. This species is widespread in Japan and China (Mirab-balou et al. 2011b), and is here newly recorded from Taiwan. In Japan, it is found commonly on grass tussocks rather than flowers. A Chinese species, A. yunnanensis is very similar to this species, but Han (1986) referred to the following differences: in yunnanensis head is longer (215 µm in female, 194 µm in male) and 1.2 times as long as pronotum in female, 1.1 times in male, antennal segment III is wider (5.6 times as long as width in female, 5.0 times in male), fore wing wider (7.9 times as long as width in female, 7.5 times in male), male tarsi brown, whereas in kurosawai head is shorter (207 µm in female, 182 µm in male) and 1.1 times as long as pronotum, antennal segment III slender (5.9 times as long as width in female, 5.7 times in male), fore wing narrower (8.6 times as long as width in female, 8.3 times in male) and male tarsi brown. However, kurosawai studied here, head is 1.2–1.3 times as long as pronotum in female, 1.1 times in male, fore wing is 7.8–8.9 times as long as width in female, 8.0 times in male and male tarsi dark brown, although head and antennal segment III of yunnannensis certainly appear to be longer than in kurosawai. It is possible that these two are the same species, but further study is necessary. The species is also very similar to A. laurencei described from Iran in having the fore wing with two dark bands connected posteriorly, the spermatheca with several internal teeth, and the mid coxa of males with strong ridges and large hump, also abdominal tergite IX of males with paired bifurcate claspers and strongly curved ventrolateral setae (Alavi et al. 2015). However, in A. laurencei the female has antennal segment IV with basal half pale, and the male has abdominal tergite IX with S1 setae much longer than S2 setae and exceeding the posterior margin of this tergite, whereas in A. kurosawai female antennal segment IV is uniformly dark and the male has abdominal tergite IX with S1 setae subequal in length to S2 setae and not reaching the posterior margin. A. kurosawai has antennal segment VI distinctly longer than wide, a character state also found in two American species, A. bicolor and A. nasturtii (Bailey, 1951), as well as one European species, A. heinzi (zur Strassen, 2003). However, these three species have fore wings with separate dark bands.
description: Published as part of Masumoto, Masami & Okajima, Shûji, 2019, Review of the Aeolothripidae (Thysanoptera) in Japan, pp. 301-326 in Zootaxa 4564 (2) on pages 306-307, DOI: 10.11646/zootaxa.4564.2.1, http://zenodo.org/record/2588916