Figures 1–6
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SEM of specimens of Heterosentis holospinus from Leiognathus equulus from Vietnam. (1) The anterior part of a worm showing the proboscis, the spineless anterior trunk cone, and the anterior part of the spiny trunk. (2) A longitudinal Gallium cut section of the anterior hook. Note the thickness of the hook layers and the relationship between the hook and the size and shape of the root. (3) Posterior hooks of the proboscis. (4) A general view of trunk spines and their pattern of distribution. (5) A high magnification of a typical duck-bill-shaped trunk spine showing a continuation of trunk micropores. (6) Micropores in a mid-section of the trunk.
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