Plectrothrips bicolor Okajima

Zhao, Chao & Tong, Xiaoli, 2017, Two new species and two new records of fungus-feeding Phlaeothripinae from China (Thysanoptera, Phlaeothripidae), ZooKeys 694, pp. 1-10 : 5

Plectrothrips bicolor Okajima Figs 11, 12

Plectrothrips bicolor Okajima, 1981: 313.

Material examined.

CHINA, Guangdong: 1 female, Guangzhou City, Arboretum of South China Agricultural University (23°09'N, 113°21'E), in leaf litter, 20.xi.2004 (Jun Wang); 1 male, Guangzhou City, Dafushan Forest Park (22°57'N, 113°18'E), in leaf litter of Litchi chinensis ,17.iv.2016 (Chao Zhao).

Diagnosis.

Body bicolored, yellow and brown. Head, thorax and tube brown, abdomen yellowish brown; all legs yellow; antennal segments II and III yellow, remaining segments brown. Head longer than broad, dorsal surface smooth except weakly sculptured posterolaterally. Antennal segments III and IV with two and three sense cones, respectively, segment VI with two sense cones. Maxillary stylets short, maxillary bridge developed and arched. Pronotum smooth, surrounded by stippled membrane with a distinct median longitudinal line. Metanotum with longitudinal striae medially. Mid tibia and hind tibia with one and two apical spur-like stout setae, respectively. Forewing parallel-sided with seven duplicated cilia. Pelta irregularly triangular with slender lateral lobes and a pair of campaniform sensilla. Abdominal tergites II–VII each with a pair of wing retaining setae; sternites V–VII with a pair of worm-like reticulate areas in both sexes; tergite IX S1 and S2 setae pointed, S1 setae longer than S2 but shorter than tube; tergite IX in male with a small median projection on posterior margin.

Distribution.

China (Guangdong); Japan; Indonesia.

Remarks.

This genus now includes 32 species in the world ( ThripsWiki 2017), of which three species have been reported from China ( Dang et al. 2014). P. bicolor , originally described from Japan and Indonesia ( Okajima 1981, 2006), is here newly recorded from mainland China. This species is extracted from leaf litter by using Tullgren funnels in the present study. In contrast, most species of the genus are usually collected under bark of decayed trees.