Pseudanaphothrips Karny, 1921

Pseudanaphothrips Karny View in CoL

Pseudanaphothrips Karny, 1921: 242 View in CoL . Type species Pseudothrips achaetus Bagnall, 1916 View in CoL , by subsequent designation of Karny, 1924: 16.

Homochaetothrips Sakimura, 1968: 59 . Type species Pseudothrips parvus Bagnall, 1916 View in CoL , by original designation. Synonym in Mound & Palmer, 1981: 164.

The genus Pseudanaphothrips View in CoL was first proposed, with no included species, in a key to Thysanoptera View in CoL genera ( Karny 1921). The genus was subsequently validated ( Karny 1924) by the inclusion of the single species Pseudothrips achaetus Bagnall View in CoL from Australia. It remained monobasic for many years, diagnosed by the absence of long setae on the pronotum ( Fig. 7 View FIGURES 1–9 ) and the presence of two complete rows of setae on the fore wing ( Fig. 6 View FIGURES 1–9 ). Sakimura (1968) erected Homochaetothrips to include a series of seven species each of which bore two pairs of moderately prominent pronotal posteroangular setae ( Fig. 8 View FIGURES 1–9 ); five of these species he transferred from Isochaetothrips , with one from Pseudothrips View in CoL and the seventh as a new species. The outer pairs of pronotal posteroangular setae are commonly shorter than the inner pairs, and both pairs vary in length amongst the species assigned to Homochaetothrips . For example, the length of the outer pair varies from 25 to 60 microns between species. All seven species share with P. achaetus View in CoL a range of structural character states as well as their Australian country of origin. Homochaetothrips was therefore placed into synonymy with Pseudanaphothrips View in CoL by Mound and Palmer (1981), together with a full generic diagnosis. All eight species included here seem to be associated with flowers or inflorescences of various plant species. Most importantly, Mound and Palmer recognized that females of all these species bear laterally on abdominal tergites VI–VII, patches of irregular microtrichia that are sometimes arranged into a pair of ill-formed ctenidia. On tergite VIII these ctenidia are more clearly defined and are situated anterolateral to the spiracles ( Figs 27–34 View FIGURES 27–34 ).As indicated above, these character states among Pseudanaphothrips View in CoL species, together with the three pairs of ocellar setae and the chaetotaxy of the metanotum and fore wing, place this genus as a member of the Frankliniella View in CoL genus-group.

Generic diagnosis: Antennae 8-segmented, III & IV with forked sense cone. Head wider than long, with three pairs of ocellar setae, ocellar setae pair III arising within ocellar triangle and usually between anterior margins of hind ocelli, never longer than distance between two ocelli. Pronotum transverse, usually with two pairs of prominent posteroangular setae, but one species with these setae no longer than the rest of the seven posteromarginal setae; anterior margin usually without any setae longer that discals. Metanotum with median setal pair arising at anterior margin, paired campaniform sensilla usually present near posterior margin; sculpture lines usually long and parallel, varying to weakly reticulate in some species. Fore wing with both longitudinal veins bearing complete row of setae. Tergites VI–VII laterally with irregular row of microtrichia sometimes forming a weakly developed ctenidium; tergite VIII laterally with pair of ctenidia more clearly defined, anterolateral to spiracles; VIII posteromarginal comb usually well developed, with median microtrichia often forming a more closely spaced group. Male similar to, but smaller than, female, sternites III–VII each with oval to transverse pore plate.