Dolichothrips utae, Mound & Okajima, 2015

Mound, Laurence A. & Okajima, Shûji, 2015, Taxonomic studies on Dolichothrips (Thysanoptera: Phlaeothripinae), pollinators of Macaranga trees in Southeast Asia (Euphorbiaceae), Zootaxa 3956 (1), pp. 79-96 : 93-94

Dolichothrips utae sp.n.

( Figs 9, 13 , 28 )

Male macroptera: Body and legs dark brown, mid and hind tarsi also apex of fore tibiae paler, fore tarsi yellow; antennal segment III yellow, IV–VI yellow with apex weakly shaded light brown, VII brown on apical half, VIII uniformly brown; major setae brown to dark brown; fore wing clear, very weakly shaded at base.

Head longer than wide, narrowed to base ( Fig. 9 ), without sculpture between ocelli, but rest of vertex transversely striate; po setae bluntly pointed, shorter than dorsal eye length, arising almost behind inner margins of eyes; maxillary stylets retracted almost to postocular setae, weakly V-shaped in position, more than one third of head width apart medially with prominent maxillary bridge; mouth cone long and pointed, extending across prosternal basantra; maxillary palps more than 7 times as long as wide. Antennae 8-segmented; segment III with 3 short sense cones, IV with 4 sense cones; VIII narrowed to base.

Pronotum smooth, with narrow band of reticulation along posterior margin; major setae all bluntly capitate; notopleural sutures complete. Fore femora slender; fore tarsal tooth small, less than one fifth as long as tarsal width. Prosternum with basantra well-developed, close under mouth cone; ferna large, triangular; mesopresternum of two triangles, with mesoeusternal anterior margin almost acute medially; metathoracic sternopleural sutures not developed. Mesonotum with median longitudinal division scarcely one third as long as this sclerite, lateral setae well-developed with blunt apices ( Fig. 13 ). Metanotum medially with sculpture weak, forming narrow longitudinal parallel reticulation laterally, median setae acute. Fore wings almost parallel sided, sub-basal setae S1 and S2 with blunt to weakly capitate apices, S3 bluntly pointed; with about 12 duplicated cilia.

Pelta broadly triangular to D-shaped with weak sculpture, campaniform sensilla present ( Fig. 28 ); tergites II– VII each with an additional pair of sigmoid setae anterolateral to wing retaining setae, also 2 or more pairs of straighter setae pointing toward mid-line ( Fig. 28 ); tergite IX setae pointed, S1 longer than tube, but S2 minute. Sternites with median pair of marginal setae slender, arising sub-marginally; about 16 small discal setae in irregular transverse row across each sternite; sternite VIII without a pore plate.

Measurements (holotype male in microns). Body length 2400. Head, length 270; width across cheeks 160; po setae 60. Pronotum, length 170; median width 250; major setae, am 35, aa 30, ml 35, epim 70, pa 70. Mesonotal lateral setae 45. Fore wing, length 950; sub-basal setae 70, 75, 85. Tergite IV lateral setae 90, 65. Tergite IX setae S1 210, S2 18. Tube length 165; longest anal setae 200. Antennal segments III–VIII length 75, 80, 65, 60, 50, 30.

Female macroptera: Similar to male but larger; pronotum with small median longitudinal apodeme; fore tarsal tooth almost half as long as tarsal width; tergite IX setae S2 as long as S1.

Measurements (paratype female in microns). Body length 2700. Head, length 270; po setae 60. Pronotum, length 190; median width 280; major setae, am 35, aa 35, ml 50, epim 70, pa 70.Fore wing length 1000. Tergite IV lateral setae 130, 100. Tergite IX setae S1 230, S2 230. Tube length 165; longest anal setae 240. Antennal segments III–VIII length 75, 70, 60, 60, 50, 30.

Specimens examined. WEST MALAYSIA, Frasers Hill , holotype male, from Macaranga gigantea , 30.vi.1999 (Ute Moog 99/150), in BMNH.

Paratypes: 3 females, 1 male, taken with holotype; EAST MALAYSIA, SARAWAK, Lambir Hills National Park , 1 female and 2 males from female flower of Macaranga gigantea , 15.vi.2006, 1 female from female flower of Macaranga hosei (= pseudopruinosa), 25.vi.2006, 1 female from male bud (or flower) of Macaranga hosei (= pseudopruinosa), 29.vi.2006, 1 male from female flower of Macaranga hosei (= pseudopruinosa), 4.vii.2006, 1 male from male flower of Macaranga hosei (= pseudopruinosa), 10.vii.2006 (Chikako Ishida); SARAWAK, Jalan Borneo Hts, 1 female, 1 male from Macaranga gigantea , 12.vi.2000 (Ute Moog 00/061). SABAH, Kota Kinabalu, 2 females, 3 males from Macaranga gigantea , 22.ix.2008. WEST MALAYSIA, Perak, Sepangan , 6 females, 1 male from Macaranga gigantea , 4.iv.2012.

Non-paratype: WEST MALAYSIA, Ulu Gombak , 1 damaged female from Macaranga hosei , 29.iv.1998 .

Comments. This species was taken from Macaranga flowers rather less frequently than fialae , and is unusual in having particularly short setae S2 on tergite IX of males. The abdominal chaetotaxy is similar to that of the unique female from northern India on which fumipennis is based. However, that species has longer and more finely pointed postocular setae, and also longer pronotal setae.

Figures

FIGURES 7 – 16. Dolichothrips species. Head & pronotum 7 – 9: (7) macarangai; (8) fialae sp. n.; (9) utae sp. n. Mesonotum and metanotum 10 – 15: (10) chikakoae sp. n.; (11) eriae sp. n.; (12) fialae sp. n.; (13) utae sp. n.; (14) franae sp. n.; (15) reuteri; (16) indicus mesonotum and pelta.

FIGURES 17 – 33. Dolichothrips species. (17) eriae sp. n. fore leg; (18) chikakoae sp. n. pelta, tergites II – III; (19) crassusensus tergites II – IV; (20) fialae sp. n. pelta, tergites II – III; (21) indicus (nesius holotype) tergites II – III; (22) indicus Syntype tergites II – IV; (23) indicus from Mo’orea, pelta, tergites II – III; (24) franae sp. n. tergites II – III. Pelta and tergites II – III 25 – 29: (25) eriae sp. n.; (26) longicollis; (27) macarangai; (28) utae sp. n.; (29) reuteri. Male pseudovirga 30 – 33: (30) fialae sp. n.; (31) longicollis; (32) macarangai; (33) reuteri.