Leptothrips Hood 1909
Creators: name: Mound, Laurence
name: O'Donnell, Cheryle
Publisher: name: Zenodo
Year: 2017
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Thysanoptera
Phlaeothripidae
Leptothrips

description: Key to the Leptothrips species from North America
1. Fore tarsus of female with small or minute tooth on inner margin................................................ 2
- Fore tarsus of female without a tooth on inner margin......................................................... 4
2. Fore wing with 6–10 duplicated cilia; antennal segment III with one sense cone; pronotal mid-lateral setae present... distalis
- Fore wing without duplicated cilia; combination of other characters different......................................3
3. Pronotum without any lines of sculpture medially; antennal segment III with one sense cone; antennal segments IV–VI uni- formly brown; pronotal mid-lateral setae present (Fig. 22)............................................ fasciculatus
- Pronotum medially with closely spaced transverse sculpture lines; antennal segment III with no sense cone; antennal segments IV–VI largely yellow; pronotal mid-lateral setae absent (Fig. 24)........................................ purpuratus
4. Pronotum medially with prominent sculpture lines...........................................................5
- Pronotum with a few striae laterally and near posterior margin, but sculpture lines medially either absent or very weak.... 1 1
5. Antennal segment II asymmetric with apical margin oblique (Fig. 6)........................................ opimus
- Antennal segment II symmetric, apex transverse.............................................................6
6. Antennal segment III with no sense cone, length of segment III usually no more than sub-equal to length of segment II; length of antennal segments III+IV no more than 125 microns [fore wing with number of duplicated cilia varying from 0–6]; appar- ently host specific to Larrea tridentata ................................................................ larreae
- Antennal segment III with one sense cone; length of antennal segments III+IV usually more than 140 microns............ 7
7. Antennal segment IV with four major sense cones............................................................8
- Antennal segment IV with three major sense cones..........................................................10
8. Maxillary stylets retracted into head to level of postocular setae, and close together medially (Fig. 5).......... occidentalis
- Maxillary stylets retracted about half way to postocular setae and wide apart (Figs 1–3)..............................9
9. Fore wing with 5 or more duplicated cilia; pronotal striae weak and widely spaced medially....................... mali
- Fore wing usually without, or with very few duplicated cilia; pronotal striae strongly developed............... heliomanes
10. Fore wing with duplicated cilia present............................................................. mcconelli
- Fore wing not known to have any duplicated cilia....................................................... papago
11. Antennal segment IV with 2 sense cones................................................................. 12
- Antennal segment IV with 3 or 4 sense cones............................................................. 13
12. Pronotum as dark as head, hind tibiae uniformly dark brown................................................. pini
- Pronotum paler than head, hind tibiae yellow distally................................................. singularis
13. Antennal segment IV with three major sense cones................................................ macroocellatus
- Antennal segment IV with four major sense cones...........................................................14
14. Antennal segment IV without a small ancillary sense cone............................................... oribates
- Antennal segment IV with a small ancillary sense cone on outer margin..................................... cassiae
description: Published as part of Mound, Laurence & O'Donnell, Cheryle, 2017, Predation, phytophagy and character state confusion among North American species of the genus Leptothrips (Thysanoptera: Phlaeothripinae), pp. 301-315 in Zootaxa 4294 (3) on page 306, DOI: 10.11646/zootaxa.4294.3.1, http://zenodo.org/record/832558