Paroxythrips, Masumoto, Masami & Okajima, Shûji, 2017

Masumoto, Masami & Okajima, Shûji, 2017, Paroxythrips gen. n. (Thysanoptera, Thripidae), associated with the gymnosperm order Araucariales in Japan and Australia, Zootaxa 4236 (2), pp. 343-350 : 343-344

Paroxythrips gen. n.

Type species: Paroxythrips podocarpi sp. n.

Female macroptera. Mouth-cone short and rounded at apex, with 3-segmented maxillary palpi. Ocellar setae minute, pair I present, pair III situated behind mid-point between hind ocelli. Postocular setae 4 pairs. Antennae 8- segmented, segment I without median dorsal apical setae, III and IV with sensoria forked, III–VI with some microtrichial rows on both dorsal and ventral surfaces. Pronotum with one pair of posteroangular setae ( Fig. 6 ). Mesonotum with median pair of setae anterior to submedian setae ( Fig. 8 ). Metascutum with irregular transverse lines medially; median pair of setae far from anterior margin. Metapre-episternum transverse, usually with 2, rarely 3 setae. Prosternal ferna undivided, narrow at middle; basantra membranous and without setae; prospinasternum broad and transverse. Mesosternum with sternopleural sutures complete and reaching anterior margin; endofurca with a spinula. Metasternal endofurca without spinula. Fore wing first vein with long gap in setal row, 6–9 basal and 2 distal setae; clavus with 5 or 6 veinal and 1 discal setae; second vein with 6–15 setae often irregularly spaced; posterior fringe cilia wavy. Tarsi 2-segmented. Abdominal tergites without ctenidia but several microtrichia present on VIII anterolateral to spiracles, II–VIII with broad craspedum along posterior margin, but craspedum often indistinct on VIII; tergites II–VII with S3 setae (posteroangular setae) slightly mesad of posterior angle; tergites IV–VIII with S1 setae situated at outer side of CPS and their interval wide, about one-third of tergal width ( Fig 10 ); tergite VIII with posteromarginal comb, microtrichia complete or absent at middle; tergite IX with MD setae prominent; tergite X with median split more than two-thirds; sternites II–VII with lobed posteromarginal craspedum between posteromarginal setae, but absent from median third of VII ( Fig. 11 ); sternites III–VII with 3 pairs of posteromarginal setae, II with 2 pairs. Ovipositor developed.

Male. Abdominal tergite IX without median short and stout setae; sternites III–VII each with a pore plate ( Fig.13 ).

Comments. This genus resembles Oxythrips and related genera in that the species have the following character states: only one pair of pronotal posteroangular setae, three pairs of ocellar setae, and 8-segmented antenna. However, it is distinguished by the following character states: ocellar setae pair III situated behind mid-point between hind ocelli, abdominal tergites setae S1 situated at outer side of median CPS, abdominal tergites and sternites with broad posteromarginal craspeda, tergite X with prominent MD setae, tergite IX of male (also second instar larva) with no short stout setae medially. Two species are here recognised as sharing these character states, one from Japan and the other from Australia .

Etymology. Derived from Greek prefix para and thrips, thripids, in reference to similarity to Oxythrips ; gender masculine.

Figures

FIGURES 6 – 13. Paroxythrips podocarpi n. sp. Female 6 – 11. (6) head & pronotum; (7) antennal segments III – VIII; (8) mesonotum & metascutum; (9) tergite V; (10) tergites VIII – X; (11) sternites VI – VII. Male 12 – 13. (12) tergite IX; (13) sternite V.