On some details of comparative anatomy in Aphelenchus, Tylenchus and Heterodera

Abstract

In the microscopic examination of plant-parasitic and free-living nematodes it frequently happens that certain anatomical details stand out clearly whilst others remain obscure. Later examination of further examples of the same species, perhaps from a different source or at another season of the year, may reveal some of the previously obscure details with the result that structures which up to that time had been difficult to elucidate, are now seen distinctly in relation to their surroundings.