Dinothrips Bagnall

Dang, Li-Hong & Qiao, Ge-Xia, 2013, Review of the spore-feeding Idolothripinae from China (Thysanoptera, Phlaeothripidae), ZooKeys 345, pp. 1-28 : 10-11

Dinothrips Bagnall

Remarks.

This genus comprises six Asian species, of which four are recorded from southern China, Dinothrips hainanensis , Dinothrips juglandis , Dinothrips spinosus and Dinothrips sumatrensis . Species of this genus can be recognised by the pelta divided into three separate parts, and the males with the mesothoracic spiracular area curiously expanded into a prominent process ( Mound and Palmer 1983). Species differ in the shape of this process in males, but females cannot be identified to species with any certainty. The spiracular process of males varies with body size within Dinothrips spinosus , and the shape also varies in slide-mounted specimens due to cover-slip pressure. As a result, it seems likely that Dinothrips hainanensis is the same species as Dinothrips spinosus . Here, the key to three species of Dinothrips Dinothrips from China excludes Dinothrips hainanensis .

Diagnosis.

Head much longer than wide, projecting slightly in front of eyes, cheeks with numbers of stout setae; eyes equally developed ventrally and dorsally; postocular setae well developed, interocellar setae usually developed; stylets V-shaped; antennae 8-segmented, segment III with 2 sensoria, IV with 4; pronotal major setae usually pointed or blunt, notopleural sutures complete; basantra present; mesothoracic spiracular area of male usually prolonged into prominent process; mesopraesternum boat-shaped; metathoracic sternopleural sutures absent; wings, if present, with duplicated cilia; fore tarsal tooth present in both sexes, a series tuber cles present on inner margin of fore tibiae in large males; pelta divided into one large median lobe, 2 small lateral lobes; abdominal tergites III–VI with 2 pairs of sigmoid wing-retaining setae; tube surface smooth, without prominent setae; anal setae usually shorter than tube.

Key to Dinothrips species from China