A total of 78 Japanese species belonging to the family Tetranychidae (spider mites) are assigned to two subfamilies, five tribes, 16 genera, and 13 species groups (only in four genera). A guide to identification of the Japanese species is provided, and information is also given about the important literature references, host plants, and distribution of each species. Three new species, Eotetranychus rubricans, Oligonychus gotohi, and Tetranychus parakanzawai are described.Eotetranychus lewisi (McGregor), recently recorded from Japan, is redescribed.Key Words: classification, fauna, host plants, Japan, keys, new species, spider mites, Tetranychidae. IntroductionAll spider mites, constituting the family Tetranychidae, are obligatory plant feeders, and many of them are ranked as very important pests of agricultural and ornamental plants. Because of their ecomomic importance, the tetranychids have much been studied in the fields of taxonomy, biology, ecology, cytology, genetics, biochemistry, etc. throughout the world. Early valuable contributions to the taxon omy of Tetranychidae were made by Oudemans, Zacher, Hirst, and Geijskes in Europe, and by Banks, Ewing, and McGregor in the U.S.A. Since 1950 some major monographs of tetranychids have been published: McGregor (1950), Pritchard and Baker (1955), Reck (1959), Wainstein (1960), Tuttle and Baker (1968), Meyer (1974Meyer ( , 1987, Wang (1981), Baker and Tuttle (1994), and Bolland et al. (1998). Other important works have been published in many parts of the world.With respect to the taxonomy of Japanese tetranychids, a few important articles were early published (Kishida 1927;Yokoyama 1929Yokoyama , 1932Yokoyama and Ishii 1934). Since Ehara (1954) Japanese tetranychid species have been studied exten sively by the author and his co-workers. Seventy-five species of tetranychids have hitherto been reported from Japan. In the present taxonomic revision the 78 species now known in this country are divided into subfamilies, tribes, genera, and species groups, with keys and illustra tions of diagnostic characters. The type locality of each species is given in parenthe ses following the citation of the original description. For every species, important references (redescriptions, etc.) and information on the host plants and distribution are also included.The type series of all the Japanese tetranychid species that were previously described by the author, as well as the new species described herein, are now preserved in the Department of Biology, Faculty of Education and Regional Sciences, Tottori University, Tottori. However, at least the holotypes will be deposited in the 64 Shozo Ehara National Science Museum, Tokyo, in the near future. Terminology and Diagnostic CharactersThe measurements are in micrometers Cfim' often being omitted in the text), and those of the holotypes of the new species are given in parentheses following the mean ± S.E.The tetranychid body is divided into the gnathosoma and idiosoma, and the latter is dorsally subdivided into the prodorsum and the...
Tetranychus takafujii Ehara & Ohashi sp. nov. is described from the black nightshade, Solanum nigrum L. (Solanaceae) in Osaka. This new mite was found to severely attack S. nigrum, S carolinense L. (horse nettle), and S. melongena L. (eggplant) in Osaka and Kyoto.
The classification of the mite family Phytoseiidae in Japan is revised. The 77 species recognized from Japan are assigned to three subfamilies, five tribes, nine genera, and 11 subgenera. Moreover, three large subgenera are divided into a total of 16 different species groups. A new tribe, Indoseiulini, is proposed, Okiseius Ehara, 1967 is reduced to a subgenus of Amblyseius, and three new species, Amblyseius (Proprioseiopsis) nemotoi, Typhlodromus (Typhlodromus) pseudopyri, and T. (T.) armiger, are described. Additionally, there is a possibility that 'Japanese Amblyseius cucumeris', which was recently reported from Saitama Prefecture in a popular book, is not A. cucumeris (Oudemans), but A. paraki Ehara, a rather common species in Saitama Prefecture. The biology of Japanese phytoseiid mites is also examined, and on this basis the species diversity of the phytoseiid fauna in Japan is interpreted. Finally, relationships between phytoseiid taxa and biological characters are discussed.Key Words: Amblyseius (Okiseius), Amblyseius (Proprioseiopsis) nemotoi, biologi cal grouping, classification, Indoseiulini, Japan, keys, new taxa, Typhlodromus (Typhlodromus) armiger, Typhlodromus (Typhlodromus) pseudopyri. IntroductionAbout 1600 species belonging to the mite family Phytoseiidae are now known to occur in the world (Chant and McMurtry 1994). The classification of this large family is quite variable among workers. Muma (1961) proposed a number of new genera in the Phytoseiidae, whilst Chant (1965) recognized fewer genera in this family. Since these two works, two schools of thought have developed, sometimes referred to as 'splitters' and 'lumpers.' In addition, Chant and his coworkers made important studies on the idiosomal setal patterns in this family (e.g., Chant and Yoshida-Shaul 1992b). In a recent paper (Ehara et al. 1994), 74 species of Japanese phytoseiid mites were assigned to eight genera and seven subgenera. In that classification, for example, the large genus Amblyseius comprises 38 Japanese species, of which the subgenus Amblyseius, without subdivisions, contains 36 (95%).Such a situation is inconvenient for economic entomologists who often utilize phytoseiids, and also for taxonomists themselves, even if it is logical. In the present paper, the classification of Japanese Phytoseiidae is revised somewhat, with practical ity in mind. The external morphology was explained concisely in an earlier paper (Ehara 1975). However, as in Ehara et a/.(1994), the setal nomenclature follows that of Chant and Hansell (1971) and Rowelle^a/. (1978). Namely, the idiosomal setae on the dorsum are divided into the dorsocentral (j-setae on podoscutum, J-setae on 26 S. Ehara and H. Amano opisthoscutum), mediolateral (z-Z), lateral (s-S), and sublateral series (r-R). For each species, the type locality and distribution records and the list of important references including redescriptions arc omitted in this paper, but these can be found in Ehara et a/. (1994). In this paper three new species are described. The measurements are in...
Two new spider mites were described and illustrated from Honshu:Panonychus osmanthi sp. nov.from Osmanthus fragrans Lour.var.aurantiacus Makino in Ryugasaki,Ibaraki Pref.,and Tetranychus pueraricola sp.nov.from Pueraria lobata(Willd.)Ohwi in Hitachi-Ohta,Ibaraki Pref. Specimens of P.osmanthi from Fukuoka Pref.,Kyushu,were also examied.P.osmanthi is a sibling species of P.citri(McGregor),while T.pueraricola is a sibling species of T.urticae Koch.
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