Thrips razanii, G, N, 2010

G, N, 2010, A new species of genus Thrips (Thysanoptera, Thripinae) from flowers in Peninsular Malaysia, Zootaxa 2638, pp. 65-68 : 65-66

Thrips razanii sp. n.

Female macroptera. Body brown ( Fig. 4 ), apex of tibiae paler, tarsi yellow; antennal segments brown, including segment III ( Fig. 3 ); forewings uniformly brown; major setae on pronotum and metanotum dark. Antennae 8-segmented, segments VII–VIII small. Head wider than long; with faint transverse striations in front of first ocellus, ocellar area smooth, vertex with fine transverse striations ( Fig 1 ); ocellar setae III arising on or just outside anterior margins of ocellar triangle; postocular setae arising in a row parallel to eye margin, seta II smaller than I or III. Pronotum wider than long, with faint transverse striations medially, almost none laterally; less than 20 small scattered discal setae; 2 pairs of long posteroangular setae, posterior margin with 2 pairs of short setae ( Fig. 2 ). Mesonotum with fine transverse striations; anteromedian campaniform sensilla present, but no striations close to these. Metanotum striate laterally, anterior half with weak transverse striations but irregular longitudinal reticulation posteromedially; median setae stout, at anterior margin, arising closer to each other than to lateral pair ( Fig. 5 ). Forewing first vein with 7 setae on basal half, 3 setae on distal half; second vein with 11 setae; forewing clavus apical and subapical setae variable, more or less equally long ( Fig. 8 ). Abdominal tergite I transversely reticulate, campaniform sensilla close to posterior margin; tergites II-VII with 1 or 2 faint transverse lines anteriorly between setae pair I, but almost no sculpture on median area mesad of setae pair II; tergite VIII posteromarginal comb complete but microtrichia unusually short and irregular ( Fig. 7 ); tergite IX with 2 pairs of campaniform sensilla, median setae extending beyond apex of X. Pleurotergites without discal setae. Sternites III–VII with 8–11 discal setae, II with about 4 discal setae and 2 pairs of marginal setae; sternite VII posteromarginal setae long, S1 arising in front of posterior margin.

Measurements (holotype female in microns). Body length 1430. Head, length 115; width across eyes 150; ocellar setae III length 20. Pronotum, length 127, width 203; posteroangular setae 58; posteromarginal setae 14–19. Metanotum median setae 45. Forewing, length 700; distal setae on first vein length 30–40. Antennal length 301; segments III–VIII length 62, 56, 36, 66, 5, 10.

Male macroptera. Body paler brown than female; antennal segment III paler brown than other segments; forewings slightly paler at base. Abdominal sternites III–VII with pore plates medially ( Fig. 6 ).

Measurements (paratype male in µm). Body length 1030. Head, length 100; width across eyes 140; ocellar setae III 20. Pronotum, length 114, width 175; posteroangular setae 56–58. Metanotum median setae 38; Forewing, length 605. Antennal length 275; segments III–VIII length 51, 49, 33, 56, 5, 9.

Material studied. Holotype female: MALAYSIA, Perak, Pulau Pangkor, on Ixora sp. flowers ( Rubiaceae ), 5– 7.v.2009 (Ng, Y.F. & Eow, L.X.)(in Centre for Insect Systematics, UKM, Malaysia). Paratypes: 14 females, 8 males, all collected Ng, Y.F. & Eow, L.X.: collected with holotype, 2 females, 1 male; Penang, Penang Butterfly Farm, 3 females, 1 male on Stachytarpheta mutabilis flower ( Verbenaceae ), 10.vii.2009; Penang, Penang Botanical Garden, 1 female, 1 male on Clerodendrum paniculatum flower ( Verbenaceae ), 9.vii.2009; Melaka, Melaka Botanical Garden, 2 females on Clerodendrum paniculatum flower, 5.ii.2009; Pahang, Lata Jarum, 1 female on Cosmos caudatus flower ( Asteraceae ), 19.xi.2009; Pahang, Lata Jarum, 1 female on dry leaves, 16.xi.2009; Penang, Berapit, Bukit Mertajam, 4 females, 5 males on Ixora sp. flower, 12-17.xii.2009 (in CIS; Australian National Insect Collection, Canberra, Australia; Natural History Museum, London, UK; National Museum of Natural History, Washington DC, USA).

Comments. This new species shares many morphological character states with T. hawaiiensis and T. florum , and it keys to that pair using the key to Malaysian Thrips species ( Mound & Azidah, 2009). However, it differs from both of them in having uniformly dark forewings that are not paler at the base. Moreover, antennal segment III is deeply shaded not pale, and ocellar setae pair III arise on the anterior margins of the ocellar triangle not clearly outside the triangle. Judging from the key to Asian species by Palmer (1992), this new species is similar to T. tristis (Priesner) from Java, and to T. pavettae (Priesner) from Sumatra. It differs from the former in having the two median metanotal setae closer to each other than they are to the lateral pair, and from the latter in having tergite II with four rather than three lateral marginal setae.

Figures

FIGURES 1 – 8. Thrips razanii sp. n.. (1) Head, dorsal; (2) Pronotum; (3) Antenna; (4) Female; (5) Meso- and metanotum; (6) Male abdominal sternites; (7) Female abdominal tergite VII – VIII; (8) Forewing.