Descriptions of Filenchus japonicus n. sp. and Ottolenchus helenae (SZCZYGIEL, 1969) BRZESKI, 1982 from Japan (Tylenchida: Tylenchidae)

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Filenchus japonicus n. sp. collected from rhizosphere of Scirpus wichurai forma concolor in Mt. Aso, Kumamoto has two incisures of lateral field, large spear knobs, functional spermatheca, and tail nearly as long as vulva-anus distance. On these bases, Tylenchus filiformis: DAS, 1960, nec BÜTSCHLI, 1873 was synonymized with the new species, although it differed from the latter in larger MB value (50 vs. 43), more rounded median oesophageal bulb, shorter body, etc. From T. filiformis: THORNE, 1961 nec BÜTSCHLI, 1873, this new species was distinguished by the longer body, tail nearly as long as vulva-anus distance, two incisures of lateral field, and presence of functional spermatheca. It differed from T. vulgaris by having large spear knobs, lateral field with two incisures, and wider annule at mid-body (1.5μm vs. 1.0μm). Tylenchus vulgaris and T. exiguus were considered distinct species and were trasf erred to Filenchus. Ottolenchus helenae from rhizosphere of Cirsium suffultum in Mt. Aso, Kumamoto was a new record of the species from Japan and was redescribed. Jpn. J. Nematol. 16: 1-9 (1986).
日本線虫学会の論文