Holoengythrips tallagandai, 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

Holoengythrips tallagandai sp.n.

( Figs 39 , 58, 59 , 69 )

Female macroptera: Body and legs brown, mid and hind femora paler distally, tarsi yellowish brown; antennal segment I and base of III yellowish brown, II light brown, remaining segments brown, major setae shaded. Head much longer than wide ( Fig. 39 ), dorsal surface almost without sculpture, ocelli well-developed, cheek setae weak, postocular setae pointed and shorter than eye length; mouth cone not extending to ferna. Antennal segment III with 2 sensoria, IV with 4 sensoria; IV–VII with parallel-sided pedicel, VIII slightly constricted at base. Pronotum transverse, with no sculpture, 5 pairs of pointed major setae. Fore tarsal tooth pointed, less than half as long as tarsal width. Mesonotal lateral setae longer than posterior pairs; metanotum with one pair of small major setae, without sculpture medially. Fore wing parallel-sided, with 6 or 7 duplicated cilia; sub-basal setae short, variable in length and number. Prosternal ferna scarcely meeting medially; mesopresternum of two slender sclerites, mesoeusternal margin weakly angulate ( Fig. 59 ); metathoracic sternopleural sutures present. Pelta anterior margin rounded; tergites with almost no sculpture, II–VII with two pairs of wing-retaining setae; major setae on II–VIII pointed; tergite IX setae S1 and S2 pointed. Anal setae shorter than tube. Sternites with one row of about 10 small discal setae.

Measurements (holotype female in microns). Body length 2000. Head, length 275; median width 175; postocular setae 60. Pronotum, length 110; median width 250; major setae: am 25, aa 25, ml 25, epim 55, pa 40. Tergite IX setae: S1 100, iS 35, S2 110. Tube length 130. Antennal segments III–VIII length 60, 55, 55, 52, 48, 30.

Female microptera: similar to macroptera but wing-retaining setae short and straight.

Male microptera: Similar to female in colour and structure except, fore tarsal tooth longer than tarsal width, fore femora slightly swollen, fore coxae with several short stout setae; mesothoracic spiracular area prominent; mesoeusternal margin sharply angulate ( Fig. 58 ), mesopresternum of two strongly divergent triangles; sternite VIII with pore plate occupying anterior two-thirds of sclerite ( Fig. 69 ).

Measurements (paratype male in microns). Body length 2500. Tergite IX setae: S1 100, iS 35, S2 50.

Material studied. Holotype female macroptera, New South Wales, Tallaganda, Lowden Forest Park, from dead Eucalyptus , 9.ii.2013 ( LAM 5736 ).

Paratypes: 3 female macropterae taken with holotype. Australian Capital Territory, Black Mt. , from dead branch , 1 male microptera, 28.viii.1995, 1 male microptera, 26.ii.2011. Victoria, Nelson , 1 male microptera from Acacia dead twigs, 13.iii.2011. Queensland, Lamington , O’Reillys , 1 male from dead leaves, 11.x.2006.

Comments. This species is very similar in body structure to maynardae , but it is uniformly dark brown, has only two sensoria on the third antennal segment, and the male lacks a tubercle at the apex of the fore tibia.

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.

FIGURES 55–62. Holoengythrips from Australia. Pterothoracic sternites: (55) kathyae sp.n.; (56) maynardae sp.n., male; (57) maynardae sp.n., female; (58) tallagandai sp.n., male; (59) tallagandai sp.n., female; (60) namadgi sp.n.; (61) barrinei sp.n.; (62) padthawayi sp.n.

FIGURES 63–72. Holoengythrips from Australia. Male sternite VIII pore plate 63–70: (63) barrinei sp.n.; (64) kathyae sp.n.; (65) maynardae sp.n.; (66) monteithi sp.n.; (67) namadgi sp.n.; (68) padthawayi sp.n.; (69) tallagandai sp.n.; (70) turcoae sp.n. Tergite IX and tube, 71–72: (71) maynardae sp.n., female; (72) padthawayi sp.n., male.