Phlaeothripinae, Uzel, 1895

Mound, Laurence A., Tree, Desley J. & Wells, Alice, 2022, Convoluted maxillary stylets among Australian Thysanoptera Phlaeothripinae associated mainly with Casuarinaceae trees, Zootaxa 5190 (3), pp. 301-332 : 304

Key to Phlaeothripinae genera associated with Casuarinaceae

1. Antennal segment VIII slender and sharply constricted to narrow basal pedicel ( Fig. 77 ); antennal segment II with sensorium on basal half of segment; mouth cone pointed and extending to (or almost to) mesosternum ( Fig. 74 ).......... Xyelethrips

-. Antennal segment VIII short with broad base; antennal segment II with sensorium usually on distal half of segment; mouth cone shorter, rarely extending across prosternum................................................................. 2

2. Antennal segment IV with 2 sense cones, III without sense cones (rarely with only 1); fore wing without duplicated cilia or micropterous......................................................................................... 3

-. Antennal segment IV with 3 sense cones (rarely with only 2), III with one sense cone; fore wing usually with duplicated cilia, rarely micropterous.................................................................................... 5

3. Antennal segment VI broadly truncate at apex, VII scarcely narrowed at base ( Figs 2–9 ); maxillary stylets crossing over each other in head or at least touching medially ( Figs 11–19 )................................................ Adrothrips

-. Antennal segment VI with apex slightly narrowed, VII clearly narrowed to base ( Fig. 72 ); maxillary stylets more widely separated............................................................................................ 4

4. Antennal segment III without sense cones; female abdominal segment IX without sclerotised fustis; postocular setae long in macropterae, short in micropterae.............................................................. Iotatubothrips

-. Antennal segment III with one sense cone; female abdominal segment IX with fustis well developed; post ocular setae always minute..................................................................................... Phallothrips

5. Fore femora of both sexes with row of tubercles on inner margin ( Fig. 47 )............................ Thaumatothrips

-. Fore femora never with row of tubercles on inner margin...................................................... 6

6. Head of females with inter-antennal projection about as long as antennal segment I ( Fig. 40 ), males with this projection only half as long as antennal segment I................................................................ Akthethrips

- Head not produced between bases of antennal segments...................................................... 7

7. Head elongate, more than 1.5 times as long as wide ( Fig. 44 ), with mouth cone acute, extending across prosternum; mesopresternum reduced to small median sclerite ( Fig. 45 ); tergite II strongly eroded laterally; antennal segment II with sensorium on basal half of segment ( Fig. 43 ); fore wing when present broad but without duplicated cilia and tergites without wing-retaining setae.................................................................... Enigmathrips gen.n.

-. Head wider than long, rarely more than 1.1 times as long as wide, mouth cone not extending across prosternum; mesopresternum transverse or reduced to two lateral triangles ( Figs 64–66 ); tergite II complete laterally; antennal segment II with sensorium on distal half of segment; fore wing rarely absent, with duplicated cilia................................... Heligmothrips

Figures

FIGURES 69–78. Iotatubothrips & Xyelethrips. I. daguilari 69–73: (69) head & pronotum; (70) metanotum & pelta; (71) tergites IX–X; (72) antenna; (73) macroptera tergites IV–VI. X. quadritibia 74–78: (74) prosternites; (75) head; (76) tergites VIII–X; (77) antenna; (78) metanotum & pelta.

FIGURES 2–10. Adrothrips species antennae. (2) aureus; (3) cotteri; (4) intermedius; (5) latrarei; (6) lihongae; (7) madiae; (8) vernoni; (9) westoni; (10) mitchelli.

FIGURES 11–19. Adrothrips heads. (11) acanthus; (12) aureus; (13) cotteri; (14) intermedius; (15) lihongae; (16) latrarei; (17) madiae; (18) systenus; (19) westoni male.

FIGURES 40–50. Akthethrips, Enigmathrips, Phallothrips, Thaumatothrips. A. strobus 40-42: (40) head; (41) pronotum; (42) metanotum & pelta. E. carnarvoni 43–46: (43) antenna; (44) head; (45) prosternites; (46) pronotum. (47) T. froggatti head & fore legs. P. houstoni 48–50: (48) microptera; (49) macroptera; (50) macroptera tergites V–VII.

FIGURES 60–68. Heligmothrips species thorax and antenna. (60) eiletus; (61) narrabri; (62) exallus; (63) xanthoskelus; (64) exallus; (65) xanthoskelus; (66) narrabri; (67) exallus antenna; (68) macropus pronotum.