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New and Known Plant Parasitic Nematodes From Ethiopia

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For more content, see Nematology.

Soil samples collected from two sites in Ethiopia yielded one new species, Discocriconemella addisababa sp. n., and four known plant parasitic nematode species: Criconemella parva (Raski, 1952) De Grisse & Loof, 1965; Paratylenchus leptus Raski, 1975; Scutellonema brevistyletum Siddiqi, 1972 and Helicotylenchus abunaamai Siddiqi, 1972. Discocriconemella addisababa sp. n. falls into "group two" of Vovlas' (1992) subdivision of the genus that comprises another seven species with a characteristic dorsally and ventrally indented labial disc. The new species differs from the others in a combination of characters: stylet length, frequent anastomoses, total number of annuli (R = 84-104), fewer annuli posterior to vulva (RV = 5-9), retrorse body annuli, high value for the ratio "c" (= 31.3-46.7), long body (L = 323-420 μm), rounded tail and absence of male. Paratylenchus leptus is reported here for the first time outside Brazil. Scanning electron micrographs of four species: Discocriconemella addisababa n. sp., Criconemella parva, Paratylenchus leptus and Scutellonema brevistyletum are also presented.

Affiliations: 1: Instituut voor Dierkunde, Universiteit Gent, Ledeganckstraat 35, B-9000 Gent, Belgium


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