The Heterothrips species of Argentina, with two new species and biological notes (Thysanoptera, Heterothripidae) Author Borbón, Carlos Manuel De text Zootaxa 2010 2562 45 56 journal article 10.5281/zenodo.197145 5c605700-e4bd-4e49-a83f-6aade07bdcb6 1175-5326 197145 Heterothrips Hood Heterothrips Hood, 1908 . Type-species H. arisaemae Hood. The species of this genus have nine antennal segments ( Fig.2 ), with one or more rows of sensory pores around the apex of segments III and IV ( Figs 28–30 ). In the head, the tentorial bridge is not developed, and the head and thorax bear only short setae ( Figs 1 , 13 ). The metanotal sculpture consists of concentric lines bearing microtrichia ( Fig 3 ). Moulton (1942) recognised two groups within the genus: group I with free or independent microtrichia on the posterior margins of the abdominal segments, and group II with these microtrichia arising from lobes, plaques or craspeda. These two groups were also recognised in the key to species by Mound & Marullo (1996) .