Holopothrips kaminskii, Lindner & Ferrari & Mound & Cavalleri, 2018

Lindner, Mariana F., Ferrari, Augusto, Mound, Laurence A. & Cavalleri, Adriano, 2018, Holopothrips diversity-a Neotropical genus of gall-inducing insects (Thysanoptera, Phlaeothripidae), Zootaxa 4494 (1), pp. 1-99 : 55-57

Holopothrips kaminskii sp. n.

( Figs 145–150 )

Diagnostic features. Body (except antenna) uniformly brown; maxillary stylets V-shaped; one pair of long pronotal setae on epimeral region; metanotal sculpture longitudinally striate; pelta clearly bell-shaped; male without pore plates; female spermatheca not enlarged.

Macropterous female: Body ( Fig. 145 ) brown, with anterior half of abdomen slightly lighter, all tarsi yellow to light brown, tergite X brown basally and lighter on apical half. Antennal segment I concolourous with head, II yellow with extreme base brown, III–IV light yellow, V–VI yellow shaded light brown, VII yellowish to very light brown, VIII yellow lightly shaded with brown. Fore wings pale, without median dark line, clavus pale; major body setae yellow to very light brown.

Head ( Fig. 148 ) about 1.2–1.3 times as long as width behind eyes, dorsal surface with weak transverse lines of sculpture, cheeks straight to very slightly curved. Eyes well-developed, dorsal length about 0.4 of head length; po with expanded apex, about as long as the dorsal length of the eye, sometimes a third well-developed setae present. Maxillary stylets V-shaped, reaching close to po level, about a third to a half of head width apart. Mouth cone with rounded tip, not reaching the posterior margin of fore coxae. Antennal segment III with 2–3 sense cones and IV with 3 sense cones + 1 additional small sense cone.

Pronotum ( Fig. 148 ) trapezoidal, with few transverse lines near posterior margin, and faint indication of reticulation anteriorly; epimeral sutures incomplete, sometimes almost reaching the posterior margin of pronotum. Four or five major pairs of pronotal setae, one pair on epimeral region; am and aa reduced, sometimes absent; ml variable, either short with acute tip or long with capitate tip, ep and pa well-developed and with capitate tips. Basantra absent; prosternal ferna well-developed, not close medially. Mesonotum ( Fig. 146 ) with irregular reticles medially; internal markings on sculpture present, but faint and restricted to few reticles. Metanotum ( Fig. 147 ) with long longitudinal lines forming a striate pattern, few internal markings on sculpture present anteromedially; one or two anterior discal setae and one pair or median major setae present. Fore tarsal hamus not enlarged. Fore wings with 11 to 14 duplicated cilia.

Pelta ( Fig. 149 ) bell-shaped, anterior margin rounded, with very long lateral wings; paired campaniform sensilla present and one pair of short setae medially to the sensilla. Sculpture covering the whole pelta but might be weaker laterally; almost equiangular reticles medially, surrounded by elongated irregular reticles laterally, transverse striation near posterior margin, internal markings on sculpture absent. Tergite II with well-defined irregular reticles medially, transverse lines laterally; sculpture less defined on further tergites. Tergites II–VII with three pairs of wing retaining setae. Tergite IX setae S1, S2 and S3 with finely acute apexes. Tube about 0.75 of head length and about 2.0 times as long as greatest width near base, apical width about 0.5 of basal width. Spermatheca ( Fig. 150 ) S-shaped, slightly thickened but not swollen medially.

Measurements (female holotype in microns): Length about 2390; head length 260, width behind eyes 205, po length 87, eye dorsal length 95; median length of pronotum 162, width across ep 290, am 35, ml 50, ep 112, pa 102; width of mesonotum 317; fore wing length 980; tergite IX setae S1 305, S2 270, S3 212; tergite X length 197, basal width 97, apical width 50; length(width) of antennal segments III–VIII 72 (32), 54(32), 62(32), 57(27), 50(25), 36(12), respectively.

Macropterous male: Similar to female in both colouration and structure, but slightly smaller; sternites without pore plates.

Measurements (male paratype in microns): Length about 1777; head length 232, width behind eyes 197, po length 80, eye dorsal length 90; median length of pronotum 135, width across ep 275, am 7, ml 50, ep 95, pa 90; width of mesonotum 300; fore wing length 900; tergite IX setae S1 237, S2 237, S3 235; tergite X length 172, basal width 82, apical width 46; length(width) of antennal segments III–VIII 65 (27), 52(27), 57(30), 52(27), 45(25), 32(11), respectively.

Larvae: Body largely yellow but with conspicuous rings of red internal pigmentation on thorax and abdomen.

Material studied. Holotype female, Brazil, Bahia, Lençóis , in Vochysia cf. obovata gall, 6.ii.2007 (Kaminski, L.A.), at UFRGS . Slide code UFRGS 0 990 .

Paratypes: 1 male and 4 females collected with holotype, at UFRGS.

Non-type specimens: 2 females collected with holotype, at UFRGS.

Etymology. Named after Lucas Kaminski, for his frequent help with collecting thrips specimens.

Comments. This species is unique within the genus in having a clearly bell-shaped pelta, with well-defined median constriction and long lateral wings ( Fig. 149 ). Holopothrips kaminskii shares a few character states with H. affinis and H. omercooperi , in the V-shaped maxillary stylets, head longer than wide and striate metanotum, but is readily distinguished from both by the pelta shape and lack of male pore plates. This thrips was found inducing galls on leaves of Vochysia cf. obovata, which become folded along the midvein ( Figs 12–13 ).

Figures

FIGURES 145–150. Holopothrips kaminskii sp. nov. holotype and paratypes. (145) body (wings not showing due to edition of photo); (146) mesonotum; (147) metanotum; (148) head and pronotum; (149) pelta; (150) spermatheca.

FIGURES 10–15. Leaf-galls induced by Holopothrips (white arrows). (10) galls on Myrtaceae (by H. flavisetis); (11) galls on Acca sellowiana (by H. infestans); 12–13. galls on Ƒochysia cf. obovata (by H. kaminskii) (Photos: Lucas A. Kaminski): (12) general view; (13) opened gall; (14) galls on Miconia sp. (by H. brevicapitatum); (15) galls on Tabebuia heterophylla (by H. tabebuia) (Photo: Irma Cabrera).