Holoengythrips barrinei, 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 : 139

Holoengythrips barrinei sp.n.

( Figs 34 , 43, 51 , 61 , 63 )

Male aptera: Body and legs brown, tarsi and fore tibiae yellow, mid and hind tibiae paler than femora; antennal segment I brown, II–III mainly yellow, IV–VIII brown base of IV paler than apex; major setae pale to weakly shaded, coxal setae dark brown. Head long, slender, dorsal surface without sculpture ( Fig. 34 ), ocelli absent, cheek setae weak, postocular setae longer than eye length with flattened apices; mouth cone not extending to ferna. Antennal segment III with 3 sensoria, IV with 4; IV–VII with parallel-sided pedicel ( Fig. 51 ), VIII slightly narrower at base than VII at apex. Pronotum transverse, with weak median apodeme but no sculpture, 5 pairs of small major setae, epimerals blunt. Fore femora slightly swollen, fore tibia with minute tubercle ventrally at apex and larger conical tubercle sub-apically on inner dorsal margin; fore tarsal tooth as long as tarsal width; fore coxae with several stout setae. Mesonotal setae all small, mesothoracic spiracular area protruding laterally; metanotum with one pair of small major setae, without sculpture ( Fig. 43 ). Prosternal ferna meeting medially; mesoeusternal margin narrow, mesopresternum of three small sclerites ( Fig. 61 ); metathoracic sternopleural sutures weak. Pelta quadrate ( Fig. 43 ); tergites weakly sculptured, with one pair of very small, straight wing-retaining setae; II–IV with one pair of setae broadly expanded and flattened at apex, blunt on V–VIII; tergite IX setae S1 pointed, setae iS longer than S2. Anal setae about as long as tube. Sternites with one row of about 10 minute discal setae; VIII with large pore plate except anteromedially ( Fig. 63 ).

Measurements (holotype male in microns). Body length 1900. Head, length 325; median width 175; postocular setae 85. Pronotum, length 120; median width 250; major setae: am 10, aa 10, ml 12, epim 55, pa 55. Tergite IX setae: S1 110, iS 45, S2 20. Tube length 130. Antennal segments III–VIII length 55, 55, 55, 50, 45, 25.

Material studied. Holotype male aptera, Queensland, Cairns, Lake Barrine , from dead branch, 10.x.2012 ( LAM 5658 ).

Comments. The structure of the head and thorax of this species is similar to that of most of the other members of the genus. However, it is unique in the form of the male pore plate, and the tubercle on the fore tibia is also distinctive, although there is also a minute ventro-apical tubercle on the fore tibia, as in maynardae .

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 43–54. Holoengythrips from Australia. Pterothorax and abdominal tergites 43–49: (43) barrinei sp.n.; (44) maynardae sp.n., male; (45) monteithi sp.n., female; (46) tarsalis sp.n.; (47) namadgi sp.n.; (48) monteithi sp.n., male; (49) turcoae sp.n. (50) monteithi sp.n., fore tarsus and tibia. Antenna 51–53: (51) barrinei sp.n.; (52) maynardae sp.n.; (53) monteithi sp.n. (54) kathyae sp.n., female fore tarsus and tibia.

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.