Thrips diana, Mound & Masumoto, 2005

Mound, Laurence A. & Masumoto, Masami, 2005, The genus Thrips (Thysanoptera, Thripidae) in Australia, New Caledonia and New Zealand, Zootaxa 1020 (1), pp. 1-64 : 22-23

Thrips diana sp. n.

Diagnosis: Female with body and legs yellow, major setae brown; antennal segments IV– VIII also apex of abdominal X light brown; forewings pale.

Head broader than long, vertex and ocellar region transversely striate; ocellar setae III arising close together behind first ocellus ( Fig. 21 ); postocular setae I, III & V twice as long as setae II and IV. Antennae 8­segmented, VII–VIII short, sensilla on III–IV short and forked. Pronotum transverse, surface with faint transverse lines and about 30 discal setae, inner and outer postero­angular setae subequal and short, posterior margin with 3 pairs of setae. Mesonotum with sculptured lines near to campaniform sensilla. Metanotum with irregular partly elongate reticulation, without internal markings ( Fig. 22 ); median pair of setae not close to anterior margin; campaniform sensilla present. Forewing first vein with complete row of short setae; clavus with 5 marginal setae, terminal seta longest. Abdominal tergite I with irregular transverse reticulate sculpture medially, remaining tergites with lines of sculpture absent mesad of campaniform sensilla; tergite II with 3 lateral marginal setae, V–VIII with chaetotaxy and ctenidia typical of Thrips , median pair of setae small; tergite VIII posteromarginal comb complete medially with long slender microtrichia; tergite IX with 2 pairs of campaniform sensilla, median pair of setae shorter than lateral pairs; tergite X with very short median split. Sternites without discal setae, II with 6 posteromarginal setae, VII with median setal pair arising in front of posterior margin; pleurotergites without discal setae, with many oblique rows of ciliate microtrichia and posterior margin with craspedum of fine microtrichia ( Fig. 23 ).

Measurements of holotype female in microns: Body length 1200. Head, length 85; width 140; ocellar setae III 15. Pronotum, length 120; width 175; postero­angular setae 35. Forewing length 660. Antennal segments III–VIII length 40, 45, 27, 38, 5, 8.

Type material: Holotype ♀, New Caledonia, Nouméa , Park Forestier, 20.viii.2002 (Diana Percy), in Musée National d’Histoire Naturelle, Paris.

Distribution: New Caledonia.

Relationships: This is the third species from New Caledonia with three pairs of setae on the posterior margin of the second abdominal sternite, and with T. martini described below and four other species from New Zealand this brings the Thrips obscuratus group to eight species ( Mound, 2005). The rows of ciliate microtrichia on the abdominal pleurotergites of T. diana are particularly unusual.

Figures

FIGURES 15–25. Thrips species. T. coprosmae 15–17: (15) Head & pronotum; (16) Meso­metanota; (17) Tergites & pleurotergites III–IV. T. darwini 18–20: (18) Head & pronotum; (19) Meso­metanota; (20) Tergites VII–VIII. T. diana 21–23: (21) Head & pronotum; (22) Meso­metanota; (23) Pleurotergites III–IV. T. excaeletus 24–25: (24) Head & pronotum; (25) Meso­metanota.