Allothrips, Hood, 1908

Mound, Laurence, Li, Yajin & Zhang, Hongrui, 2020, Species of the genus Allothrips (Thysanoptera, Idolothripinae) from Southeast Asia, with one new species from Yunnan, China, Zootaxa 4732 (4), pp. 593-595 : 593

Key to Allothrips species from Southeast Asia

[* Based on original descriptions]

1. Head laterally with many small capitate setae ( Fig. 7 ) [ USA, Taiwan]................................... nubillicauda

-. Head laterally with small acutely pointed setae ( Fig. 8 )....................................................... 2

2. Head uniformly covered with strong reticulate sculpture; abdominal segments II–VIII brown but head, thorax and abdominal segments IX–X yellow [ Taiwan].................................................................. taiwanus *

-. No more than posterior third of head with reticulate sculpture; body colour different................................ 3

3. Head with mid-dorsal setae arising on posterior half of head, far posterior to postocular setae, and usually capitate........ 4

-. Head with mid-dorsal setae arising on anterior half of head, between or a little posterior to a line joining the bases of the postocular setae, usually small and acute ( Figs 1, 8 )............................................................. 5

4. Postocular setae longer than dorsal length of compound eyes; mid-dorsal head setae small and acute; antennal segments II–III each with 2 capitate setae [ Thailand]................................................................ magnus *

-. Postocular setae shorter than dorsal length of compound eyes; mid-dorsal setae strong and capitate; antennal segments II–IV each with 2 capitate setae [ Thailand]............................................................... expansus *

5. Head with lateral postocular setae capitate ( Fig. 8 ); mesonotum of apterae with three pairs of capitate setae, two laterally and one sub-median; pelta anterior third with no sculpture; tergite IX setae S2 as capitate as setae S1; tube less than 1.8 times as long as basal width; tergite IX almost as brown as VIII; legs yellow but femora washed with light brown [ Brazil, Hawaii, Japan]............................................................................................. brasilianus

- Head with lateral postocular setae pointed ( Fig. 1 ); mesonotum of apterae usually with only the lateral pairs of setae capitate; pelta anterior third reticulate ( Fig. 3 ); tergite IX setae S2 bluntly pointed to weakly capitate, in contrast to strongly capitate setae S1; tube 2.0 times as long as basal width; tergite IX yellow in contrast to VIII ( Fig. 4 ); legs uniformly light brown [Yunnan]....................................................................................... yunnanensis sp.n.

Figures

FIGURES 1–8. Allothrips species. A. yunnanensis sp.n. (aptera) 1–4: (1) head & pronotum (mid-dorsal setae indicated); (2) antenna; (3) mesonotum, metanotum, pelta & tergite II; (4) tergites VIII–X. A. yunnanensis sp.n. (macroptera) 5–6: (5) mesonotum, metanotum, pelta & tergite II; (6) tergites III–V. (7) A. nubillicauda head. (8) A. brasilianus head (mid-dorsal setae indicated).