Heliothrips

Nakahara, Steve, O’Donnell, Cheryle A. & Mound, Laurence A., 2015, Heliothrips haemorrhoidalis and its relatives, with one new species and one new genus (Thysanoptera: Thripidae), Zootaxa 4021 (4), pp. 578-584 : 579

Key to Heliothrips species

1. Metascutal triangle with posteromarginal flange absent, or not reaching anterior margin of metascutellum ( Fig. 2 ); abdominal tergite I with median minute setal pair arising on reticulate area ( Fig. 2 ); tergites III–VIII with reticulation in front of antecostal ridge weakly developed or absent ( Fig. 9 )......................................................... similis sp.n.

-. Metascutal triangle with posteromarginal flange extending over anterior margin of metascutellum ( Fig. 1 ); tergite I with median minute setal pair arising anterior to reticulate area ( Fig. 1 ); tergites III–VIII with reticulation in front of antecostal ridge strongly developed ( Fig. 8 ).............................................................................. 2

2. Femora dark brown; antennal segment VI dark brown with base slightly paler; antennal segment IV 0.65 as long as III ( Fig. 6 ), with ventral sense cone 0.75 as long as segment......................................................... zucchi

-. Femora yellow; antennal segment VI yellow at least in basal half; antennal segment IV 0.75 as long as III ( Fig. 4 ), with ventral sense cone no more than 0.5 as long as segment................................................. haemorrhoidalis

Figures

FIGURES 1 – 7. Heliothrips species, mesonotum, metanotum and tergite I, 1 – 3: (1) haemorrhoidalis; (2) similis sp. n.; (3) zucchi. Antennae, 4 – 7: (4) haemorrhoidalis; (5) similis sp. n.; (6) zucchi; (7) Neoheliothrips sylvanus comb. n. (arrows indicate paired minute pores on first abdominal tergite).

FIGURES 8 – 9. Heliothrips species, tergites III – IV: (8) haemorrhoidalis; (9) similis sp. n. (arrows indicate tergal antecostal ridge; note reticulation strong or weak in front of this line).