Lissothrips

Mound, Laurence A. & Tree, Desley J., 2015, Species of Lissothrips and Williamsiella from mosses and lichens in Australia and New Zealand (Thysanoptera, Phlaeothripinae), Zootaxa 3946 (3), pp. 361-373 : 362

Key to Lissothrips species from Australia and New Zealand

1. Antennal segments VII and VIII broadly joined ( Fig. 3 ), segment III with one sense cone; fore tarsus with a tooth, although this is sometimes small and directed ventrally.................................................................. 2

-. Antennal segment VIII slender and narrowed to base ( Figs 1–2, 4–7 ), segment III with no sense cone; fore tarsus usually without a tooth in both sexes................................................................................ 3

2. Pelta broadly D-shaped ( Fig. 17 ); pronotal am setae less than 0.5 as long as aa setae; New Zealand and Australia.... dentatus

-. Pelta reduced to irregular sub-circular sclerite; pronotal am and aa setae equally long and slender; New Zealand.... dugdalei

3. Head with po setae capitate ( Figs 8–10 ); both sexes micropterous with wing lobe more than 25 microns long ( Fig. 18 ); male [where known] with no pore plate on sternite VIII........................................................... 4

-. Head with po setae finely acute ( Figs 11–13 ); apterous, or micropterous with wing lobe no more than15 microns ( Fig. 21 ) [one macroptera known]; male sternite VIII pore plate present or absent.............................................. 6

4. Antennal segment III wider than long, almost disc-shaped ( Fig. 2 )...................................... discus sp.n.

-. Antennal segment III longer than wide, laterally convex ( Figs 1, 4 )............................................. 5

5. Antennal segment IV with 2 stout sense cones; maxillary stylets about 1/3 of head width apart; wing lobe 25–30 microns long; pelta transverse ( Fig. 16 ), extending across 0.7 of width of tergite II; female fore tarsus with no tooth....... corticosus sp.n.

-. Antennal segment IV with 3 slender sense cones; maxillary stylets about 1/4 of head width apart; wing lobe 40–60 microns long; pelta D-shaped ( Fig. 19 ), extending across 0.5 of width of tergite II; female fore tarsus with minute tooth... hypni sp.n.

6. Mesopresternum transverse and entire ( Fig. 26 ); antennal segment III scarcely 1.3 times as long as wide ( Fig. 6 ); male with no pore plate on sternite VIII; both sexes with minute fore wing lobe 10–15 microns long bearing one major seta...................................................................................................... taverneri sp.n.

-. Mesopresternum absent or reduced to two lateral sclerites ( Fig. 25 ); antennal segment III more than 1.5 times as long as wide ( Figs 5, 7 ); male sternite VIII with or without pore plate medially; both sexes fully apterous......................... 7

7. Male sternite VIII without pore plate; female with pronotal am scarcely 3 times as long as pronotal posterior discal setae ( Fig. 11 ), male am setae about 20 microns long............................................................. gersoni

-. Male sternite VIII with small oval or broadly transverse pore plate; both sexes with pronotal am setae about 5 times as long as posterior discal setae ( Figs 13, 15 )....................................................................... 8

8. Male sternite VIII with small oval pore plate medially ( Fig. 27 ); mesonotum of both sexes usually with pair of long setae laterally ( Fig. 20 )............................................................................ tallagandai sp.n.

-. Male sternite VIII with narrow elongate pore plate medially ( Fig. 28 ); mesonotum never with lateral setae elongate................................................................................................. thomsonae sp.n.

Figures

FIGURES 1 – 7. Lissothrips species from Australia—antennae. (1) corticosus; (2) discus; (3) dentatus; (4) hypni; (5) tallagandai; (6) taverneri; (7) thomsonae.

FIGURES 16 – 21. Lissothrips species from Australia—meso & metanotum and pelta. (16) corticosus; (17); dentatus; (18) discus; (19) hypni; (20) tallagandai; (21) taverneri.

FIGURES 8 – 15. Lissothrips species from Australia—head and pronotum. (8) corticosus; (9) discus; (10) hypni; (11) gersoni; (12) taverneri; (13) tallagandai; (14) discus; (15) thomsonae.

FIGURES 22 – 28. Lissothrips species from Australia. (22) thomsonae meso & metanotum and pelta. (23) hypni male tergites VIII-X. Thoracic sternites 24 – 26: (24) corticosus, (25) tallagandai, (26) taverneri. Male sternite VIII 27 – 28: (27) tallagandai, (28) thomsonae.