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Genus Mesodorylaimus Andrassy, 1959
“Definition: Dorylaiminae. Characterized by dissimilar tails, female long-filiform, male short and bluntly rounded; cuticle smooth without longitudinal ridges.
Usually medium-sized species, the majority between 1 and 2 mm. but ranging from less than 1 mm. to 6 mm. Lateral pores are siad to be mostly absent from cuticle. Head usually narrower than body and slightly offset; arrangement of papillae as in Dorylaimus. Spear well developed. Guiding ring appearing single or double, the fixed anterior ring tends to be less than a head-width from anterior end of the body. Amphids as in Dorylaimus. Vulva transverse in 4 species, longitudinal in 3, a round pore in 2 and no data available for the great majority. Gonads of both sexes as in Dorylaimus. Supplements either contiguous or somewhat separate from one another with a gap between the ventral series and the pre-anal pair. Submedian, pre-anal papillae present in some series and the pre-anal pair. Submedian, pre-anal papillae present in some species. Pre-rectum of male extending forward beyond the range of the supplements in 13 species, within the range in 6 but no data available for the majority.Type species: Mesodorylaimus mesonyctius (Kreis, 1930) Andrassy, 1959 syn. Dorylaimus mesonyctius Kreis, 1930” From
Goodey, 1963 and from Tom Powers and Peter Mullin’s website http://nematode.unl.edu/
Goodey T. and J.B. Goodey. 1963. Soil and Freshwater Nematodes. Butler and Tanner Ltd, London, Great Britain