Nesothrips species

Eow, Li-Xin, 2014, Australian species of spore-feeding Thysanoptera in the genera Carientothrips and Nesothrips (Thysanoptera: Idolothripinae), Zootaxa 3821 (2), pp. 193-221 : 211-213

Key to Nesothrips species from Australia

1. Head 1.3–1.5 times as long as wide ( Figs 47–50 ); tergite IX setae S1 more than 0.75 as long as tube.................... 2

-. Head wider than long, or no more than 1.1 times as long as wide ( Figs 51–55 ); tergite IX setae S1 less than 0.6 as long as tube .................................................................................................... 6

2. Head with postocellar setae elongate, more than twice as long as distance between their bases ( Fig. 47 ) [body dark brown with antennal segment III yellow, IV yellow on basal half].................................................. lativentris

-. Head with postocellar setae shorter than distance between their bases........................................... 3

3. Postocellar setae long, about 0.8 as long as distance between their bases, with broadly blunt apices; pronotum with 2 pairs of major epimeral setae ( Fig. 67 ) [legs, head, thorax and abdominal segment I yellow, abdomen dark brown]....... capricornis

-. Postocellar setae small, no more than 0.5 as long as distance between their bases, with apices pointed; pronotum usually with only one pair of long setae on each epimeron................................................................ 4

4. Pronotum with 5 pairs of major setae ( Fig. 62 ); vertex weakly reticulate, mid-dorsal head setae well developed ( Fig. 50 ).............................................................................................. coorongi sp.n.

-. Pronotum with only 3 pairs of major setae; vertex without reticulation even in ocellar region, mid-dorsal head setae small... 5

5. Antennal segment III almost 4 times as long as apical width ( Fig. 60 ); pronotal aa setae less than 0.5 as long as postocellar setae...................................................................................... barrowi sp.n.

-. Antennal segment III less than 3 times as long as wide ( Fig. 59 ); pronotal aa setae about 2.0 times as long as postocellar setae................................................................................................ badius

6. Pelta D-shaped, with no lateral lobes ( Fig. 66 )....................................................... hemidiscus

-. Pelta with lateral lobes................................................................................. 7

7. Metanotum with no sculpture on anterior third, with narrowly linear reticulation on posterior two-thirds ( Fig. 63 )....................................................................................................... rossi sp.n.

-. Metanotal sculpture different, often with equiangular reticulation (see Fig. 64 )..................................... 8

8. Female tergite IX setae S3 short, no longer than basal width of tube; major setae on head, pronotum and metanotum unusually stout and dark [eyes not prolonged ventrally].......................................................... aoristus

-. Female tergite IX setae S3 long, much longer than basal width of tube; major setae on head, pronotum and metanotum not stout and dark........................................................................................ 9

9. Entire posterior margin of eyes prolonged on ventral surface ( Fig. 57 ); usually apterous with ocelli absent ( Fig. 51 ) [antennal segment I yellow]............................................................................. propinquus

-. Ventral posterior margin of eyes not prolonged; usually winged, if micropterous then wing lobe relatively long and hind ocelli present............................................................................................. 10

10. Antennal segment I brown, as dark as head................................................................ 11

-. Antennal segment I yellow to brownish yellow, much paler than head........................................... 12

11. Antennae brown but III sharply yellow near base ( Fig. 61 )................................................ carveri

-. Antennal brown but segment III mainly yellow, IV–V yellow at base....................................... yanchepi

12. Ocellar setae arise on or anterior to a tangent between anterior margins of hind ocelli ( Fig. 54 )............. brigalowi sp.n.

-. Ocellar setae arise posterior to tangent between anterior margins of hind ocelli and close to tangent between posterior margins of hind ocelli ( Fig. 52 ).............................................................................. minor

Figures

FIGURES 47–55. Nesothrips species. Head: (47) lativentris, (48) badius, (49) barrowi, (50) coorongi, (51) propinquus, (52) minor major male, (53) carveri, (54) brigalowi, (55) rossi.

FIGURES 62–68. Nesothrips species. Thoracic features and pelta: (62) coorongi, (63) rossi, (64) brigalowi, (65) barrowi. Pelta: (66) hemidiscus. Pronotum: (67) capricornis. Maxillary palps and mesopresternum: (68) propinquus.

FIGURES 56–61. Nesothrips species. Maxillary palps: (56) badius. Eye ventral surface: (57) propinquus. Antennal segments III–VIII: (58) yanchepi, (59) badius, (60) barrowi. Antennal segments II–VIII: (61) carveri.