Aeolothrips luteolus Kurosawa, 1939

Masumoto, Masami & Okajima, Shûji, 2019, Review of the Aeolothripidae (Thysanoptera) in Japan, Zootaxa 4564 (2), pp. 301-326 : 308

Aeolothrips luteolus Kurosawa

( Figs 6 , 18 , 50–55 )

Aeolothrips luteolus Kurosawa, 1939: 577 .

Aeolothrips gloriosus ; Tsutsumi, 2001: 17.

Female macroptera. Distended body length 1.7–1.8 mm. Body bicoloured ( Fig. 6 ); head pale with large brown marking at middle of dorsal surface, pronotum pale, pterothorax pale with mesonotum and metascutum brown, abdominal tergite I pale brown, II–V or VI pale brown to brown but pale along anterior margin and posterior margin laterally, VI or VII–X brown, posterior tergites darker, sternites pale with antecostal ridge dark on III–VII; antennal segments I–II pale, III–VIII dark brown with extreme base of III pale; fore wings with two separate dark bands, apex pale, extreme base shaded, clavus pale with extreme base shaded ( Fig. 18 ); all femora pale with dorsal surfaces brown, all tibiae brown, all tarsi shaded; prominent body setae dark brown. Head about 0.8 times as long as wide, weakly arched at cheeks, sculptured with narrowly spaced anastomosing striae on dorsal surface ( Fig. 50 ), ventrally with 17 pairs of setae between compound eyes, a pair of mid-lateral setae beside compound eyes very long; interocellar setae and some postocular setae stout. Antennal segments III and IV with sensoria elongate, 0.1– 0.2 and 0.4–0.5 times as long as length of the segment respectively, V with ventral sensorium having circular or small oval base, slightly longer than combined length of VI–IX ( Fig. 51 ). Antennal segments I–IX ratio length/ width as follows: 0.9–1.0, 1.9–2.1, 3.1–3.2, 2.4–3.3, 2.1–2.6, 0.8–0.9, 0.7–0.9, 1.0, 1.6–1.7. Pronotum 0.6–0.7 times as long as wide, weakly sculptured with anastomosing striae, with no long setae but some setae on anterior and posterior margins slightly longer than discal setae. Mesonotum with median pair of setae shorter than lateral pair; anteromedian CPS present. Metascutum with transverse concave reticulation on posterior half and relatively equiangular reticulation on anterior half; CPS present ( Fig. 52 ). Abdominal tergites II–VII weakly sculptured laterally, smooth mesad of S2 setae; tergite I with posteromedian CPS; tergite IX usually without minor setae between S1 setae ( Fig. 53 );; sternites III–VI each with 6, 6, 6 (rarely 7), 8 posteromarginal setae, VI with S4 setae far from 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. 54 ). Spermatheca weak and with no internal teeth ( Fig. 55 ).

Male. Unknown.

Specimens studied. Holotype female, Iwate Pref., Takenoko Daira, on swept, vi-1938, A.Yazima (NARO). Other specimens: JAPAN: Honshu, Fukushima Pref.: Iwaki City, Tabito, 1 female on Pleioblastus chino [ Poaceae ], 28.v.2010, T.Tsutsumi (FU). Matsukawa-cho, Fukushima University, 1 female on leaf-litter of Quercus serrata [ Fagaceae ] and P. chino , 16.v.2000, T.Tsutsumi (FU). Chiba Pref., Inba-gun, Sakae-machi, Fudokino-oka, 1 female on flower of Polygonatum falcatum [ Liliaceae ], 4.vi.2008, M.Masumoto (TUA). Yamanashi Pref., Hokuto City (alt. 1400m), 1 female on male cone of Pinus densiflora [ Pinaceae ], 4.vi.2016, M.Masumoto (TUA). Nagano Pref., Kakuma-dani, 2 females on flower of Castanea sp. [ Fagaceae ], 24.vi.1973, K.Haga (TUA). KOREA: Gyongsang bug-do, Mt. Sudo-san (350m), 7 females on yellow pan trap, 30.v.1979, K. Yamagishi (TUA).

Remarks. This species is known from China as well as Japan (Mirab-balou et al. 2011b) and is here newly recorded from Korea. It is very similar in body colour to the European species, A. gloriosus . However, the latter is distinguished from A. luteolus by the following features, based on some females from Europe identified by the late Drs. zur Strassen and Bournier: antennal segment III pale in basal third and with sensorium 0.3 times as long as the segment, all legs pale, not shaded, clavus shaded in basal two-thirds and antecostal ridge on abdominal sternites IV–VII pale laterally. A female recorded as A. gloriosus by Tsutsumi (2001) should be identified as A. luteolus judging from comparison with the specimens listed above including the holotype.

Figures

FIGURES 1–7. Aeolothrips species. A. fasciatus, 1–2: (1) Female; (2) Male. (3) A. fukushimensis, sp. n., female. A. kurosawai, 4–5: (4) Female; (5) Male. (6) A. luteolus, female; (7) A. melaleucus, female (a: From Honshu; b: holotype of A. concinus).

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 49–55. Aeolothrips species. (49) A. kurosawai, male tergite IX. A. luteolus, female, 50–55: (50) Head & pronotum; (51) Antenna; (52) Mesonotum & metascutum; (53) Tergite IX (sculpture omitted); (54) Sternite VII; (55) Spermatheca, dorsal aspect.