Holoengythrips tarsalis, Mound & Tree, 2014

Mound, Laurence A. & Tree, Desley J., 2014, Fungus-feeding phlaeothripine Thysanoptera in the genus Holothrips from Australia and New Caledonia, with a structurally similar new genus, Holoengythrips, Zootaxa 3860 (2), pp. 125-148 : 143-146

Holoengythrips tarsalis sp.n.

( Fig. 41 )

Female microptera: Body and legs brown, tarsi yellow; antennal segment I yellow, II light brown, III–V yellow at base, V–III brown, major setae shaded. Head much longer than wide, dorsal surface almost without sculpture ( Fig. 41 ), ocelli small, cheek setae very weak, postocular setae weakly capitate, shorter than eye length; mouth cone just extending to ferna. Antennal segment III with 2 sensoria, IV with 3 sensoria; IV–VII with parallel-sided pedicel, VIII broadly joined to VII. Pronotum transverse, with no sculpture, 5 pairs of short, bluntly pointed major setae. Fore tarsal tooth acute, nearly as long as tarsal width ( Fig 41 . Mesonotal setae small; metanotum with one pair of small major setae, without sculpture medially. Prosternal ferna not meeting medially; mesopresternum of two slender sclerites, mesoeusternal margin almost straight; metathoracic sternopleural sutures present. Pelta subquadrate; tergites with almost no sculpture, major setae on II–VIII pointed; tergite IX setae S1 and S2 long and finely pointed. Anal setae shorter than tube. Sternites with one row of about 10 small discal setae.

Measurements (holotype female in microns). Body length 1900. Head, length 300; median width 225; postocular setae 50. Pronotum, length 135; median width 280; major setae: am 20, aa 20, ml 20, epim 45, pa 30. Wing lobe 30. Tergite IX setae: S1 100, iS 45, S2 95. Tube length 110. Antennal segments III–VIII length 55, 50, 50, 50, 45, 25.

Male: not known.

Material studied. Holotype female microptera, New South Wales, Walcha , from Helichrysum leaf, 28.xii.2000 ( LAM 3997 ).

Paratypes: Queensland: Brisbane, Mt Glorious , 1 female microptera from dead branch, 19.i.2006 ; Aldershot , 1 female microptera from Eucalyptus bark spray, 18.vii.2011 .

Comments. Each of the three micropterae has a very small wing lobe that does not bear any long setae, and each of them also has three ocelli present. Although similar in body structure to tallagandai , this species has three sensoria on the fourth antennal segment and the female fore tarsal tooth is longer.

Figures

FIGURES 34–42. Holoengythrips from Australia. Heads: (34) barrinei sp.n.; (35) kathyae sp.n.; (36) maynardae sp.n.; (37) monteithi sp.n.; (38) namadgi sp.n.; (39) tallagandai sp.n.; (40) padthawayi sp.n.; (41) tarsalis sp.n.; (42) turcoae sp.n.