Neohydatothrips fascipennis, 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 : 408-411

Neohydatothrips fascipennis sp. n.

( Figs 4, 5, 9 , 18–25 )

Female macroptera. Body bicolored ( Fig. 4 ), head, pterothorax and abdominal segments VII–IX dark brown, abdominal segments I–IV and X brown, pronotum yellow with blotch slightly shaded, abdominal segments V–VI yellow, abdominal tergites II–VIII with antecostal ridge dark; antennal segment I pale brown slightly paler than VI, II–III yellow, IV yellow with apical neck pale brown, V–VIII pale brown; fore wing brown with 2 pale bands at subbasal and middle areas ( Fig. 21 ); fore and mid femora yellow but often shaded at middle of mid femora, hind femora brown with yellow at base and extreme apex, all tibiae yellow but slightly shaded at middle of mid and hind tibiae, all tarsi yellow; major body setae shaded. Head 0.7–0.8 times as long as wide, weakly sculptured with transverse anastomosing striae dorsally, weakly reticulate within ocellar triangle; occipital area short, distance between posterior margin of compound eyes and occipital apodeme almost as long as diameter of one ommatidium, postoccipital area developed and transversely striate ( Fig. 18 ); ocellar setae pair III on anterior margin of ocellar triangle; postocular setae 3 pairs along posterior inner margin of compound eyes, S1 setae much longer than remaining setae, subequal length to ocellar setae pair III. Antennae 8-segmented ( Fig. 19 ), segments III and IV with weak apical neck, IV and V pedicelate, III longest. Ratio length/width of antennal segments I–VIII as follows: 0.9, 1.4–1.6, 3.4–3.8, 3.6–4.0, 2.8, 3.7–3.9, 1.5–1.7, 3.5. Pronotum 0.6–0.7 times as long as wide, with 15–18 discal setae, sculptured with transverse anastomosing striae, almost smooth between transverse striae; posteromarginal setae much longer than discal setae, about 0.4 times as long as median length of pronotum; blotch slightly shaded, weak but distinct except posterolaterally, constricted at middle. Mesonotum closely sculptured with transverse anastomosing striae; median pair of setae anterior to submedian pair. Metanotum sculptured transversely anteromedially and longitudinally at each side, irregularly reticulate at middle; median pair of setae behind anterior margin. Tegula without microtrichia. Fore wing with veinal setae dark and almost as long as 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, often with 7 setae on one side of IV or V or VI–VII; tergite I with microtrichia between median CPS and laterally; tergites II–VII with 4–6 small dark spots along antecostal ridge on each side ( Fig. 23 ), with discal microtrichia lateral to S2 setae, a few microtrichia extending to mesad of S1 setae along antecostal ridges on II–IV, reaching to S1 setae medially and several rows across the tergites in front of S1 setae on V–VII, discal microtrichia stouter on II–IV than on posterior tergites ( Fig. 22 ), with posteromarginal microtrichia lateral to S2 setae but often near reaching to S1 setae on V–VI and complete on VII, a few minute microtrichia at mesad of S2 setae on III–IV or V; tergite VIII with weak microtrichia, only a few microtrichia extending to mesad of S1 setae, smooth anteriorly and medially; tergite IX with 3 pairs of MD setae and no microtrichia, 1.3–1.5 times as long as median length of tergite X; sternites with discal and posteromarginal microtrichia lateral to S2 setae on II–VI ( Fig. 24 ), 4–6 small dark spots along antecostal ridge on each side of III–VII.

Measurements (holotype female in microns). Distended body length 1630. Head length 118 (length including anterior prolongation 130), width across cheeks 163; compound eyes dorsal length 83, width 53. Ocellar setae III length 30, interval 25. Postocular setae I length 30–38. Pronotal median length 145, width 215; posteromarginal setae length 56–60. Metanotal median length 80, median pair of setae length 38. Fore wing length 910, width at middle 50. Abdominal tergite IX length 123, tergite X length 93. Ovipositor length 410. Antennal segments I–VIII length (width) as follows: 30 (33), 48 (30), 80 (23), 75 (20), 55 (20), 65 (18), 13 (8), 18 (8).

Male macroptera. General structure similar to female, abdominal segments V–VII yellow ( Figs 5, 9 ). Abdominal sternites with microtrichia slightly extending to mesad of S2 setae, sternite VII with an oval small pore plate, 13–15 microns width ( Fig. 25 ).

Measurements (paratype males in microns). Distended body length 1130–1150. Head length 93–95, width across cheeks 143–150; compound eyes dorsal length 60–65, width 50–55. Ocellar setae III length 21, interval 20. Postocular setae I length 29–33. Pronotal median length 118–120, width 183–188; posteromarginal setae length 43–52. Metanotal median length 65–68, median pair of setae length 30–38. Fore wing length 740–750, width at middle 40–50. Antennal segments I–VIII length (width) as follows: 25–28 (30), 38–40 (28), 65 (20), 68 (18–19), 50–68 (18–20), 48–58 (18), 8–10 (8), 13 (5).

Type series. Holotype female. JAPAN: Honshu: Hiroshima-ken, Mihara-shi, Hongou-cho, on leaf and stem of Elaeagnus umbellata [ Elaeagnaceae ], 4.v.2008, Y. Kojima. Paratypes: JAPAN, Honshu: 31 females & 10 males, same data as holotype. Fukushima-ken, Kitashiobara-mura, Hibara, nr. Renge-numa pond (alt. 820m), 12 females & 9 males on Elaeagnus umbellata , 21.vi.2020, T. Tsutsumi. Tochigi-ken, Ichikai-machi, 1 female & 1 male on Elaeagnus umbellata , 11.v.2020, S. Okajima. The holotype and most paratypes are deposited in TUA.

Comments. N. fascipennis is slightly similar to N. hemileucus (Hood) from Brazil and N. variabilis (Beach) from North America by having fore wing with two dark bands at distal three-fourth and bicoloured body. N. hemileucus also shares pale pronotum with indistinct blotch and postocular setae arranged longitudinally ( Lima & Mound 2016a). However, N. fascipennis can be distinguished from N. hemileucus by the fore wings with apex dark and abdominal tergite IX with three pairs of MD setae, whereas the later species has the fore wings pale at apex and tergite IX with two pairs of MD setae. N. variabilis differs from this new species by having fore wing pale at apex, abdominal tergites IV–VI pale with median and anterolateral areas, tergite IX with two pairs of MD setae, and the sternites with microtrichia medially ( Mound et al. 2019; Lima & Mound 2016a).

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 18–25. Neohydatothrips fascipennis, sp. n. Female, 18–24: (18) Head–metanotum; (19) Antenna; (20) Thoracic sterna; (21) Fore wing; (22) Abdominal tergites II–III, right side; (23) Abdominal tergites VI–XI; (24) Abdominal sternites VI–VII. (25) Abdominal sternite VII, male.