Plectrothrips Hood,

Mound, Laurence A., Dang, Li-Hong & Tree, Desley J., 2013, Genera of fungivorous Phlaeothripinae (Thysanoptera) from dead branches and leaf-litter in Australia, Zootaxa 3681 (3), pp. 201-224: 215-216

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Plectrothrips Hood


Plectrothrips Hood 

There are 32 species listed in this genus from various tropical countries, and a key to 29 of these was provided by Okajima (1981). The species live on dead twigs and branches. Members of this genus exhibit an interesting autapomorphy in that the sensorium on the second antennal segment is situated on the basal half of that segment not near the apex ( Fig. 11View FIGURES 8 – 18). One species, P. australis  , has been collected between Sydney and Brisbane ( Fig. 42View FIGURES 39 – 45).

Diagnosis. Head usually a little longer than wide; postocular setae usually developed, wide apart; stylets variable, usually retracted into head; antennae 8 -segmented, II with campaniform sensilla in basal half of segment, VIII long, III with 2 or 3 sensoria, IV with 3; pronotum clearly smaller than prothorax, without major setae; notopleural sutures complete; basantra absent; mesopraesternum reduced; sternopleural sutures present or absent; fore tarsal tooth present in both sexes; fore wings, if developed, parallel-sided, with duplicated cilia; pelta broad with slender lateral lobes; tergite II eroded laterally; tergites II –VII each with one pair of wing retaining setae; tube and anal setae variable; male sternite VIII without pore plate.