Thrips simplex (Morison)

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 : 49-51

Thrips simplex (Morison)

( Figs. 207–213 )

Physothrips simplex Morison, 1930: 12 .

Female macroptera. Body uniformly dark brown; antennal segment III brownish yellow; fore wings dark with basal fourth pale. Ocellar setae III within ocellar triangle ( Fig. 207 ). Postocular setae II and IV much smaller than I and III. Antennae ( Fig. 208 ) 8-segmented. Pronotum ( Fig. 207 ) with 2 pairs of posteroangular setae, with 3 pairs of posteromarginal setae. Metascutum ( Fig. 209 ) longitudinally reticulate medially having internal wrinkles; median pair of setae far from anterior margin; CPS absent. Fore wing first vein without gap in setal row, usually seven or eight basal and six to nine distal setae. Abdominal tergites ( Fig. 210 ) with no lines of sculpture extending to mesad of S1 setae; tergite II with 3 lateral marginal setae; tergite VIII ( Fig. 211 ) with posteromarginal comb complete, but microtrichia short; tergite IX with 2 pairs of CPS; sternite I with a few microsetae anteromedially sternite II with one, III to VII with 11 to 15 discal setae; sternite VII with S1 setae at posterior margin; pleurotergites with numerous ciliate microtrichia along line of sculpture and no discal setae.

Male macroptera. Abdominal tergite VIII with only a few microtrichia at middle of posterior margin; tergite IX ( Fig. 212 ) with S1 setae ahead of level of S2 setae and subequal to S2 setae, their bases equidistant; sternal discal setae much fewer than female; sternites III to VII ( Fig. 213 ) each with a broad transverse pore plate.

Comments. This species probably is from South Africa and has been dispersed to various parts of the world by human trade in Gladiolus bulbs. In Japan, it was found at Ibaraki, Shizuoka and Nara in Honshu, for the first time in 1986. It breeds mainly on Iridaceae ( Hoddle et al., 2012) , but In Japan, adults of this species also occur in Chrysanthemum [ Asteraceae ] other than Gladiolus ( Miyazaki & Kudo, 1988) and is intercepted on many plant families imported from other countries by plant quarantine ( Hayase, 1991).

Figures

FIGURES 207–222. Thrips species. T. simplex, female 207–211: (207) Head & pronotum; (208) Antenna, right; (209) Metascutum; (210) Tergite V & pleurotergite, left side; (211) Tergite VIII. T. simplex, male 212–213: (212) Tergite IX; (213) Sternite VII, sculpture omitted at right side. T. subnudula, female 214–216. (214) Head & pronotum, sculpture omitted at left side of pronotum; (215) Metascutum; (216) Abdominal sternites VI–VII, sculpture omitted at right side. (217) T. subnudula, male, abdominal sternite VII, sculpture omitted. T. sukki, female 218–222: (218) Head & pronotum, sculpture omitted at right side of pronotum; (219) Antenna, right; (220) Metascutum. T. sukki, male 221–222: (221) Tergites VIII–IX; (222) Sternite VII.