Neohydatothrips bicolor, Masumoto & Okajima, 2020

Masumoto, Masami & Okajima, Shûji, 2020, Two new species of Neohydatothrips John (Thysanoptera, Thripidae) from Japan with a record of micropterous N. elaeagni (Kudo), Zootaxa 4869 (3), pp. 404-412 : 406-407

Neohydatothrips bicolor sp. n.

( Figs 1, 7 , 10–15 )

Female macroptera. Body bicolored ( Figs 1 & 7 ), head, mesothorax, metanotum, abdominal segments VII–IX brown, metasternum ( Fig. 12 ), abdominal segments I–III and X pale brown, pronotum and abdominal segments IV–VI yellow, metapleural area yellow but often shaded, abdominal tergites II–VII with antecostal ridge darker, the ridge weak at middle of VII; antennal segments I–II yellow, III–V yellow with apex pale brown, V–VIII pale brown; fore wing including clavus pale brown with subbasal area pale ( Fig. 13 ); all legs almost uniformly yellow but often with small weakly shaded spots on femora and tibiae; major body setae pale or weakly shaded. Head about 0.7 times as long as wide, weakly sculptured with anastomosing transverse striae dorsally, weakly reticulate within ocellar triangle but almost smooth between hind ocelli; occipital area long, distance between posterior margin of compound eyes and occipital apodeme about twice as long as diameter of an ommatidium, postoccipital area short and transversely striate ( Fig. 10 ); ocellar setae pair III within or on anterior margin of ocellar triangle; postocular setae 3 pairs along posterior inner margin of compound eyes, S1 setae (median pair of setae) subequal in length to ocellar setae pair III. Antennae 8-segmented ( Fig. 11 ), segments III and IV with weak apical neck, IV and V pedicelate, III longest. Ratio length/width of antennal segments I–VIII as follows: 0.8, 1.2–1.3, 2.8–2.9, 2.6–3.1, 2.2–2.5, 2.4–2.8, 1.2–1.3, 2.5–3.0. Pronotum about 0.7 times as long as wide, with 19–22 discal setae and no long setae, sculptured with transverse anastomosing striae, no wrinkles between transverse striae; blotch weakly defined, only anterior margin visible. Mesonotum sculptured with transverse anastomosing striae, smooth anterior one-fourth; median pair of setae anterior to submedian pair. Metanotum reticulate transversely at middle and striate longitudinally at each side; median pair of setae behind anterior margin. Tegula without microtrichia. Fore wing with veinal setae shorter than one-third of median width of wing, first vein with short gap in setal row near apex, second vein with 2 setae on distal area. Abdominal tergites with no wrinkles between striae, 3–4 small dark spots along antecostal ridge on each side of II–VII ( Fig. 14 ); tergite I with microtrichia laterally; tergites II–VI with discal microtrichia lateral to S2 setae, a few rows of microtrichia reaching to median CPS on V–VI, posteromarginal microtrichia lateral to S2 setae but a few minute microtrichia extending mesad of S2 setae; tergites VII–VIII with discal microtrichia lateral to S1 setae, posteromarginal microtrichia on VII small at mesad of S1 setae and narrowly lacking at middle; tergite IX with 2 pairs of MD setae (3 setae on left side of holotype), 1.1–1.2 times as long as median length of tergite X; sternites with microtrichia at outside of S2 setae, posteromarginal microtrichia sparse, absent between S1 setae, 2–4 small dark spots along antecostal ridge on each side of II–VII ( Fig. 15 ) .

Measurements (holotype female in microns). Distended body length 1400. Head length 108 (length including anterior prolongation 128), width across cheeks 155; compound eyes dorsal length 83, width 50. Ocellar setae III length 25, interval 24. Postocular setae I length 25–33. Pronotal median length 138, width 203. Metanotal median length 73, median pair of setae length 30–31. Fore wing length 760, width at middle 50. Abdominal tergite IX length 83, tergite X length 75. Ovipositor length 310. Antennal segments I–VIII length (width) as follows: 25 (30), 40 (31), 65 (23), 63 (20), 50 (20), 48 (20), 10 (8), 13 (5).

Male unknown.

Type series. Holotype female. JAPAN, Honshu : Kanagawa-ken , Yokosuka-shi, Kurihamadai, on young leaf of Wisteria floribunda [Leguminosae], 5.v.2017, M. Masumoto . Paratypes: JAPAN, Honshu : 14 females collected together with holotype. 12 females, same locality and host plant with holotype, 7.v.2017. Yokosuka-shi , Mt. Takatori-yama , 1 female young leaf of Wisteria floribunda , 5.v.2016. Mt. Take-yama , young leaf of Wisteria floribunda , 5.v.2019. Chiba-ken : Narita-shi , Ohtake , 1 female on young leaf of Wisteria floribunda , 3.v.2015. Narita-shi , Ohtake , Sakatagaike-kouen park, 5 females on young leaf of Wisteria floribunda , 10.v.2015; 9 females on young leaf of Wisteria floribunda , 9.v.2015. Futtsu-shi , foot of Mt. Nokogiri-yama , 3 females on young leaf of Wisteria floribunda , 5.v.2015. Yamanashi-ken, Hokuto-shi [N35.48.35, E138.27.37, alt. 650m], 2 females on young leaf of Wisteria floribunda , 3.v.2016. (all M. Masumoto). Osaka-fu, Sakai-shi, Minami-ku, 2 females on leaf of Wisteria floribunda , 11.v.2014, Y.Kojima .

Non-paratypic specimen. JAPAN, Honshu: Tokyo-to, Aomi, 1 female on Styrax japonica [ Styracaceae ], 17.iv.2013; 1 female on Imperata cylindrical [ Poaceae ], 2.v.2014. (all. M. Masumoto). The holotype and most paratypes are deposited in TUA.

Comments. This new species apparently has a unique combination of character states in the subfamily as follows: pronotum with no long setae and indistinct blotch, and fore wing with short veinal setae.

Figures

FIGURES 1–9. Neohydatothrips species. (1) N. bicolor sp. n., female. N. elaeagni, female, 2–3: (2) Microptera; (3) Macroptera. N. fascipennis sp. n., 4–5: (4) Female; (5) Male. (6) N. samayunkur, female; (7) N. bicolor, sp. n., female; (8) N. elaeagni, female microptera; (9) N. fascipennis sp. n., male.

FIGURES 10–17. Neohydatothrips species. N. bicolor sp. n., female, 10–15: (10) Head–metanotum; (11) Antenna; (12) Metasternum; (13) Fore wing; (14) Abdominal tergites VI-XI; (15) Abdominal sternite V. N. elaeagni, female microptera, 16–17: (16) Meso- & metanota; (17) Abdominal tergites V–VI.