Watanabeothrips yasuakii Okajima

Ng, Y. F., 2017, Organothrips stongensis sp. n. and Watanabeothrips yasuakii Okajima: new records from Peninsular Malaysia of Thysanoptera: Thripidae, Zootaxa 4341 (2), pp. 283-286 : 285-286

Watanabeothrips yasuakii Okajima ( Figs 9–16 )

Watanabeothrips yasuakii Okajima, 2002: 113 .

This genus comprises a single species which exhibits sexual dimorphism in the body setae. Females have setae flattened and fan-shaped, a particularly uncommon condition for members of Thripinae , whereas males have normal setaceous setae. The only known species in the genus was described from Thailand, based on about 50 specimens of both sexes taken from bamboo. During our sampling in the northern part of Peninsular Malaysia, we collected four females of this species. Initially it seemed these might represent an undescribed species as the following character states differed from the original description: (1) abdominal tergites III–VII anteromedian area sculptured; (2) fore wing clavus with four veinal setae; (3) abdominal tergites II–VII with brown marking medially, segments VIII–X uniformly pale. However, paratype specimens of yasuakii were kindly loaned by Dr Masami Masumoto, and these did not differ from the Malaysian specimens discussed above. The only difference was that the specimens from Malaysia have antennal segments I and II completely pale.

Material studied: MALAYSIA, Kelantan, Dabong, Gunung Stong Forest Reserve, four females collected on Bamboo , 25-30.vi.2016 (Ng, Y.F.) (in ANIC and CISUKM) . THAILAND, Chiang Mai, Doi Inthanon , 1♂ 1♀ collected on bamboo, 29.viii.1992 (T. Nonaka et.) , 1♀ Chiang Mai, Pha Hean , 3.xi.1992 (T. Nonaka Leg.) , 1♀ Chiang Mai, Phrow , 22.viii.1992 (T. Nonaka et.).

Figures

FIGURES 9 – 16. Watanabeothrips yasuakii: (9) Head & Pronotum; (10) Meso- and metanotum; (11) Antennal segments I − VIII; (12) Female body; (13) Meso- and metasterna; (14) abdominal tergites IV – VIII; (15) Sternites IV – VIII; (16) Fore wing.