Strepterothrips okajimai, Mound, Laurence A. & Tree, Desley J., 2015

Mound, Laurence A. & Tree, Desley J., 2015, Fungus-feeding Thysanoptera: Phlaeothripinae of the Idiothrips genus-group in Australia, with nine new species, Zootaxa 4034 (2), pp. 325-341 : 332

Strepterothrips species (apterae) from Australia

1. Mesoeusternum anterior margin entire ( Fig. 16 ); antennal segment III at least 1.5 times as long as wide ( Fig. 26 ); pelta without discal setae.......................................................................................... 2 -. Mesoeusternum divided longitudinally ( Figs 17–19 ); antennal segment III shorter and broader, no more than 1.3 times as long as wide ( Figs 20–25 ); pelta often with discal setae............................................................ 3 2. Metanotum with 20–50 short pale setae distributed evenly across sclerite ( Fig. 41 ); pronotum with discal setae distributed almost evenly ( Fig. 41 ), postero-median third with 8–10 setae; meso and metanota coarsely tuberculate ( Fig. 41 )..................................................................................................... tuberculatus -. Metanotum with less than 10 setae on anterior two-thirds, posterior third with narrow transverse band of 20–30 setae ( Fig. 40 ); pronotum medially and posteriorly with 4–6 setae, anterolaterally with dense groups of 25–30 setae ( Fig. 39 ); meso and metanota finely and densely tuberculate ( Fig. 40 )..................................................... verruculus s p.n. 3. Antennal segment III clear yellow, or brownish-yellow, in contrast to dark brown IV ( Figs 23–24 ); antennal segment IV with three sense cones...................................................................................... 4 -. Antennal segment III as dark brown as IV ( Figs 20–22 ); antennal segment IV with two sense cones................... 5 4. Antennal segment II as yellow as III ( Fig. 24 ), segment III short, 1.1 times as long as wide; postocular setae less than 0.5 as long as fore tarsal width; apterae with posteromarginal setae on tergites II–V scarcely longer than apical width; tube less than 2.8 times as long as basal width ( Fig. 45 )............................................................ orientalis -. Antennal segment II brown ( Fig. 23 ); segment III 1.2–1.3 times as long as wide; postocular setae as long as fore tarsal width ( Fig. 30 ); apterae with posteromarginal setae on tergites II–V at least twice as long as apical width; tube at least 3 times as long as basal width ( Fig. 44 )...................................................................... okajimai sp.n. 5. Antennal segment III with one small fine sense cone......................................................... 6 -. Antennal segment III small, without any sense cones........................................................ 7 6. Metanotum with no more than 12 small, fine setae ( Fig. 36 ); pelta without discal setae; pronotum weakly sculptured with no more than 16 fine setae........................................................................... apterus -. Metanotum with about 30 short, blunt setae ( Fig. 37 ); pelta with discal setae; pronotum strongly reticulate with more than 24 small stout discal setae ( Fig. 38 )............................................................... barbatus sp.n. 7. Pelta with no discal setae ( Fig. 42 ); tube of female more than 2.2 times longer than basal width; antennal segments IV–V with distinct sculpture lines......................................................................... moffati sp.n. -. Pelta with 2 or more discal setae ( Fig. 34 ); tube of female less than 2.0 times as long as basal width; antennal segments IV–V with no sculpture lines................................................................................. 8 8. Antennal segment III goblet-shaped, maximum width no more than 1.1 times apical width ( Fig. 20 ); pronotal midlateral setal pair not developed; tergites III–IV with discal setae pointed............................................ arake sp.n. -. Antennal segment III maximum width 1.4 times apical width ( Fig. 25 ); pronotal midlateral setal pair capitate; tergites III–IV with discal setae bluntly pointed.............................................................. parvulus sp.n.

Figures

FIGURES 16 – 26. Strepterothrips species from Australia. Mesoeusternal anterior margin 16 – 19: (16) verruculus; (17); arake; (18) orientalis; (19) parvulus. Antennae 20 – 26: (20) arake; (21) barbatus; (22) moffati; (23) okajimai; (24) orientalis; (25) parvulus; (26) tuberculatus.

FIGURES 36 – 45. Strepterothrips species from Australia. Metanotum and pelta 36 – 37: (36) apterus; (37) barbatus. Pronotum 38 – 39: (38) barbatus; (39) verruculus. (40) verruculus metanotum and pelta. (41) tuberculatus thorax and pelta. (42) moffati metanotum, pelta and tergites. Apical abdominal segments 43 – 45: (43) arake; (44) okajimai; (45) orientalis.

FIGURES 27 – 35. Strepterothrips species from Australia. Head 27 – 29: (27) moffati, (28) tuberculatus; (29) verruculus. Head and pronotum 30 – 32: (30) okajimai; (31) parvulus;; (32) arake. Metanotum, pelta and tergites 33 – 34: (33) okajimai; (34) akake. (35) Male verruculus.