Holopothrips striatus Jorge, Cavalleri, Bedetti & Isaías

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 : 86

Holopothrips striatus Jorge, Cavalleri, Bedetti & Isaías

( Figs 257–261 )

Holopothrips striatus Jorge, Cavalleri, Bedetti & Isaias, 2016: 175 .

Diagnostic features. Body (except antenna) uniformly dark brown; maxillary stylets not retracted to po level; one pair of long setae on epimeral region; metanotal sculpture thoroughly striate; pelta anterior margin forming an acute tip, sculpture with thin reticles medially, bearing internal markings; males with pore plates on sternites VII– VIII, two anteroangular plates and a transverse posterior band, which is largely interrupted medially on VII; female spermatheca not enlarged.

Comments. This dark brown species is known only from the type series collected in leaf-roll galls of Myrcia retorta ( Fig. 4 ) in Southern Brazil ( Jorge et al. 2016). The head is about 1.4 times as long as wide and the maxillary stylets are wide apart and retracted to basal third of head length ( Fig. 258 ). The anteromarginal setae are very short and the metanotum is characteristic in having longitudinally striate sculpture ( Fig. 260 ). Larvae are largely white, but with bright transverse bands of red internal pigmentation on thorax and abdomen. The general body structure of H. striatus resembles the Peruvian species H. orites , but is distinguished from that by the overall smaller body size, absence of internal markings on mesonotal sculpture, and female spermatheca not being swollen medially. Other dark-bodied Holopothrips species, such as H. atlanticus , H. nigrum and H. nigrisetis also have some similarities, but H. striatus is distinct from these species in lacking the second pair of major ep setae ( Fig. 259 ).

Material studied. 2 male 2 female paratypes; Brazil, Rio Grande do Sul, São Francisco de Paula, Pró-Mata, in Myrcia retorta gall, 17.ii.2014 (Cavalleri, A. col.), at UFRGS . 1 female non-type, Rio Grande do Sul, Cambará do Sul, Aparados da Serra, in Myrcia guianensis gall, 27.i.2013 (Cavalleri, A.), at UFRGS. Slides with codes UFRGS 2476 , UFRGS 3449 , UFRGS 3450 , UFRGS 3455 , UFRGS 3456 .

Figures

FIGURES 254–261. Holopothrips stannardi and H. striatus. 254–256. Holopothrips stannardi paratypes: (254) body; (255) head and pronotum; (256) spermatheca; 257–261. Holopothrips striatus holotype and paratypes: (257) body; (258) head; (259) pronotal setae; (260) mesonotum and metanotum; (261) pelta.

FIGURES 1–9. Leaf-galls induced by Holopothrips (white arrows). (1) galls on Siphoneugena reitzii (by H. curiosus); (2) galls on Myrciaria floribunda (by H. spermathecus) (Photo: André Santana); (3) gall on Myrcia guianensis (by H. molzi); (4) gall on Myrcia retorta (by H. striatus); (5) gall on Myrcia sp. (by H. cardosoi) (Photo: João C. Cardoso); (6) gall on Myrcia splendens (by H. conducans); (7) gall on Myrcia splendens (by H. longisetus); (8) gall on Myrcia selloi (by H. acrioris); (9) galls on Neomitranthes obscura (by H. varicolor) (Photo: Sheila Carvalho-Fernandes).