Abstract
DIFFERENCES in the vulval region of the Tylenchid nematodes of the genus Heterodera are of considerable systematic value1–3. The “bullae”, knob-like structures4 not present in all species, are of particular importance. They seem to be endocuticular, but their function is unknown. This communication reports the presence in the four species so far examined of other endocuticular bodies closely associated with the vulva itself. My attention was directed to them by Dr C. Ellenby, who first observed them in sectioned material of H. rostochiensis and H. tabacum (unpublished work).
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References
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WILSON, E. Vulval Bodies in Certain Species of Heterodera. Nature 217, 879 (1968). https://doi.org/10.1038/217879a0
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DOI: https://doi.org/10.1038/217879a0
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