Abstract
Pin nematode species are widely distributed and known to be associated with damage to a variety of shrubs, grasses, fruit and flowering trees. So far, no pin nematode species has been reported from Mulberry in China. During this study, a new Paratylenchus species recovered from the rhizosphere of mulberry tree, in Zhejiang Province is described and molecularly characterized. The species can be characterized by having swollen and slender females, four incisures in the lateral field, lip region conoid with anterior end flattened and without submedian lobes. The slender females have stylet 56.2 (50–62) μm long, excretory pore located at the level of nerve ring; vulval region with small advulval flap; tail conoid gradually tapers to form a finely pointed terminus. The swollen females comparatively larger than slender females, vulval lips enlarged, protruding and bulges out from the body contour, the tail is shorter than the slender female ending in a finely pointed terminus. The male is devoid of stylet, spicule 17.5 (16.8–18.2) μm long. Phylogenetic analysis based on partial 18S, ITS and D2-D3 expansion segments of the 28S rRNA gene sequences revealed that this new species grouped within paratylenchid species clade. Morphologically, this new species belongs to the Group 10 of Paratylenchus sensu lato (stylet >40 μm, 4 lateral lines and advulval flaps present).
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