Masami Masumoto

Review of the genus Thrips and related genera (Thysanoptera, Thripidae) from Japan

Members of Thrips genus-group from Japan are reviewed, and 45 species in seven genera are recognized. Nine species and one genus are newly described: Stenchaetothrips amamiensis sp. n., S. dentatus sp. n., S. pleioblasti sp. n., Thrips nonakai sp. n., T. ogasawarensis sp. n., T. shiranesanus sp. n., T. syringae sp. n., T. typicus sp. n. and Tsutsumiothrips ryukyuensis gen. et sp. n. Moreover, 14 species of two genera are newly recorded from Japan: S. langkawiensis Ng & Mound, S. undatus Wang, Thrips alni Uzel, T. aspinus Mound & Masumoto, T. brevicornis Priesner, T. brunneus Ishida, T. extensicornis Priesner, T. minutissimus Linnaeus, T. pini (Uzel), T. subnudula (Karny), T. sukki Bhatti & Lee, T. trehernei Priesner, T. urticae Fabricius and T. vitticornis Karny. A previously recorded species, Stenchaetothrips bambusae (Shumsher) is excluded from the Japanese fauna.

Species composition of thrips (Thysanoptera: Thripidae) and spider mites (Acari: Tetranychidae) on cultivated chrysanthemum (Asteraceae) in Okinawa, southwestern Japan

We investigated the species composition of phytophagous thrips and spider mites on cultivated chrysanthemum in Okinawa, southwestern Japan. Eight thrips species belonging to the genera Frankliniella, Microcephalothrips, Scirtothrips and Thrips were found on chrysanthemum leaves. Among them, Thrips nigropilosus was the predominant species irrespective of season, island or cultivation environment (meshed greenhouse or open field), with its infestation frequency being 89% of the fields in which thrips occurred. This high frequency of occurrence suggests that T. nigropilosus is a major pest of chrysanthemum in Okinawa, even though this species has rarely been regarded as an important pest of chrysanthemum or other crops in any other areas. Thrips palmi was the second most dominant (infestation frequency 36%) and other species were scarce (<14%). Tetranychus urticae (green form) was the only tetranychid species on chrysanthemum in our survey. This lack of diversity among spider mites on chrysanthemum is peculiar considering that eight Tetranychus species have been found on vegetables in the same area. Since T. urticae (green form) has been shown to be resistant to a number of pesticides, severe pesticide applications might have simplified the spider mite fauna on chrysanthemum in Okinawa.

Rhamphothrips genus-group (Thysanoptera, Thripidae) in Japan, with three new species

In Japan, no members of Rhamphothrips genus-group have hitherto been known, but three species of this group are here newly described from Japan: Exothrips yaeyamanus sp. n., Rhamphothrips nemunoki sp. n. and R. ogasawarensis sp. n. Moreover, an uncertain species of Exothrips is recorded from Okinawa on Poaceae.

Studies on Dendrothripinae (Thysanoptera, Thripidae) from Japan, with new records and one new species

Pseudodendrothrips maculatus sp.n. is described from Morus leaves in Japan, and the following five species of Dendrothripinae are newly recorded from Japan: Leucothrips furcatus Hood, L. nigripennis Reuter, L. piercei (Morgan), Pseudodendrothrips darci (Girault) and P. lateralis Wang. Moreover, P. bhattii is newly recorded from Taiwan. An identification key to Pseudodendrothrips species from Japan and Taiwan is provided, and the metathoracic pleural area is compared between several Dendrothripinae genera.

Anaphothrips genus-group: key to world genera, with two new species and three new records from Japan (Thysanoptera, Thripidae)

An identification key is provided to the 40 genera worldwide that comprise the Anaphothrips genus-group of Thripinae. Oxythrips japonicus sp.n. and Rubiothrips galii sp.n. are described from Japan, and the members of Anaphothrips genus-group from Japan are reviewed, with 15 species in eight genera. Anaphothrips swezeyi Moulton, Caprithrips insularis Beshear and C. melanophthalmus (Bagnall) are newly recorded from Japan.

Paroxythrips gen. n. (Thysanoptera, Thripidae), associated with the gymnosperm order Araucariales in Japan and Australia

An Oxythrips-like new genus and species, Paroxythrips podocarpi, is described from Podocarpus macrophyllus in Japan. An Australian species, Oxythrips agathidis Morison, that is associated with Agathis is transferred to Paroxythrips.

Figures 23–30 In Studies On Dendrothripinae (Thysanoptera, Thripidae) From Japan, With New Records And One New Species

FIGURES 1–10. Japanese species of Dendrothripinae. Leucothrips, female 1–3. (1) L. furcatus; (2) L. nigripennis; (3) L. piercei. Pseudodendrothrips, 4–10; (4) P.bhattii, female; (5) P.darci, female; (6) P.lateralis, female; (7) P.lateralis, male:(8) P. maculatus, female; (9) P.maculatus, male; (10) P.mori, female.

Species-richness in the Oriental fungus-feeding thrips of the genus Azaleothrips (Thysanoptera, Phlaeothripidae)

Azaleothrips, a phlaeothripine genus of fungus-feeding species, is presumably endemic to the Oriental Region between India and Japan. Although only 10 species have been known in this genus until now, a total of 35 species is recorded here, of which 26 are newly described: from Indonesia--A. bali sp.n., A. bulelengi sp.n., A. dentatus sp.n., A. dorsalis sp.n., A. floresi sp.n., A. inflavus sp.n., A. simulans sp.n., A. sulawesicus sp.n., from the Philippines--A. apoensis sp.n., A. bifidius sp.n., A. luzonensis sp.n., A. mindanaoensis sp.n., A. philippinensis sp.n., from Taiwan--A. atayal sp.n., A. formosae sp.n., A. taiwanus sp.n., from Thailand--A. flavicollis sp.n., A. phuketanus sp.n., A. pulcher sp.n., A. toshifumii sp.n., from Vietnam--A. laocai sp.n., A. vietnamensis sp.n., from W. Malaysia--A. malaya sp.n., A. reticulatus sp.n., A. richardi sp.n., A. templeri sp.n. In addition A. magnus Chen, described from Taiwan, is newly synonymized with A. moundi. Azaleothrips laevigatus, described from southern Japan, is newly recorded more widely in Southeast Asia. A key to 33 species is provided, but A. bhattii and A. lineus cannot be recognized because of the poor information in the original descriptions.

Occurrence in Japan of Frankliniella hemerocallis (Thysanoptera, Thripidae), with description of the larva and key to Frankliniella species from Japan.

The occurrence in Japan of the daylily thrips, Frankliniella hemerocallis, is confirmed. This thrips probably originated in Asia or Eurasia, because it is highly specific to Hemerocallis [Liliaceae] which is native to these areas. This thrips feeds on leaf, stem and petals rather than pollen. The second instar larva is described, and a key provided to the adults of Frankliniella species recorded from Japan.