Holoengythrips maynardae, 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 : 140-141

Holoengythrips maynardae sp.n.

( Figs 36 , 44, 52 , 56, 57 , 65, 71 )

Male microptera: Bicoloured brownish-yellow with posterior abdominal segments darker, fore femora brown, mid and hind femora brown with distal third sharply yellow; mid and hind tibiae brown, tarsi yellow; antennal segments I–II yellow, III–VIII brown but III–IV with basal stem yellow ( Fig. 52 ); major setae brown, coxal setae dark brown. Head long, slender ( Fig. 36 ), dorsal surface without sculpture, ocelli small, cheek setae weak, postocular setae acute and longer than eye length; mouth cone not extending to ferna. Antennal segment III with 3 sensoria, IV with 4; IV–VII with parallel-sided pedicel VIII broadly joined to VII. Pronotum broad, with median apodeme but no sculpture, 5 pairs of pointed major setae. Fore femora swollen, fore tibia angled with small tubercle ventrally at apex, fore tarsal tooth as long as tarsal width; fore coxae with several short stout setae. Mesonotal setae all small, mesothoracic spiracular area protruding; metanotum with one pair of small major setae, without sculpture medially ( Fig. 44 ). Prosternal ferna abutting medially; mesopresternum of two oval sclerites ( Fig. 56 ) meeting sharply angulate mesoeusternal margin; metathoracic sternopleural sutures present. Pelta almost quadrate; tergites with almost no sculpture, with one pair of very small, straight wing-retaining setae; II–IV with one pair of setae broadly expanded and flattened at apex, acute on V–VIII; tergite IX setae S1 acute, about as long as tube, setae iS longer than S2. Anal setae about as long as tube. Sternites with one row of minute discal setae; VIII with pore plate occupying anterior two-thirds of sclerite ( Fig. 65 ).

Measurements (holotype male in microns). Body length 1840. Head, length 275; median width 175; postocular setae 100. Pronotum, length 170; median width 300; major setae: am 35, aa 30, ml 30, epim 45, pa 45. Metanotal median setae 12. Tergite IX setae: S1 95, iS 55, S2 30. Tube length 100. Antennal segments III–VIII length, 65, 60, 60, 50, 45, 30.

Female microptera: Similar to male in colour and structure, except: fore tarsal tooth about half as long as tarsal width; metanotal median setae longer; mesoeusternal margin weakly angulate, mesopresternum of paired lateral triangles ( Fig. 57 ); mesothoracic spiracular area not prominent; tergite marginal setae all pointed.

Measurements (paratype female in microns). Body length 1880. Metanotal median setae 20. Tergite IX setae: S1 105, iS 60, S2 110. Tube length 125.

Material studied. Holotype male microptera, Norfolk Island, Red Road , from dead wood, 27.xii.2012 (Alice Wells 66).

Paratypes, all micropterae, Norfolk Island: 1 female, 3 males taken with holotype; same locality, from Toona dead branch, 1 female, 2 males, 25.xii.2012 ; Bird Rock Track , 2 females from dead branches, 25–26.xii.2012 , 1 female, 1 male, 26.x.2013; Red Road in forest, 2 females, 5 males from fallen Araucaria and Elaeodendron , 24.xii.2013 ; Mission Road , 2 females, 1 male from dead branch, 22.xii.2013 ; Palm Glen , 1 male from dead palm frond, 23.xii.2013 ; 1 male from dead branch, Highland Lodge, 24.xii.2013.

Comments. Although presumably endemic to Norfolk Island, this species is closely similar to several other species described here in body structure and the form of the male pore plate. It is particularly similar to kathyae and turcoae from eastern Australia.

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.