There was a highly significant difference between the spicule lengths of the Nottingham-maintained H. bakeri (mean = 0.518 mm) and H. polygyrus (0.598 mm) from 11 different localities across the British Isles.
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Quantitative assessment of spicule length in <i>Heligmosomoides</i> spp. (Nematoda, Heligmosomidae): distinction between <i>H. bakeri</i>, <i>H. polygyrus</i> and <i>H. glareoli</i>.
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