TWO NEW SPECIES OF TRICHODORUS (NEMATODA: DORYLAIMIDA) FROM ENGLAND BY D. J. HOOPER Rothamsted Experimental Station, Harpenden, England Trichodorus velatus n. sp., ♂ and ♀ , is from sandy soils growing Sitka spruce seedlings, arable crops and herbaceous plants. The male resembles T. similis Seinhorst, 1963, but its unstriated spicules are stouter with a wider, non cephalated, proximal end; a narrow characteristically bent central area and a distal region with a distinct subventral flange (velum). The female has smaller refractive thickenings at the vulva than T. similis and resembles T. viruliferus Hooper, 1963, but the refractive thickenings are more obvious and the vaginal cervix has more pronounced lobes in lateral view. T. variopapillatus n. sp., ♂ and ♀ , is from woodland, wet, sandy soil associated with the roots of Elder (Sambucus nigra L.). Some males have two, others three, ventromedian cervical papillae and the unstriated spicules are of a similar shape to T. similis but much thinner. The female has conspicuous refractive blocks at the vulva and the vaginal region is rounded. During the past six years several different populations of a Trichodorus sp. have been examined from various sites in Eastern England. Although the males resemble
Nematologica – Brill
Published: Jan 1, 1972
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