Fig. 5. SEM micrographs of Corynosoma semerme from grey seals, Halichoerus grypus, in the Swedish Baltic Sea. a. ♀, entire worm, ventro-lateral view, from the Bothnian Sea, Hälsingland, Stocka. Spines cover the entire ventral surface of the hind-trunk. b. ♂, whole worm, ventral view, from the Bothnian Sea, Hälsningland, Stocka. Ventral spination of the entire hind-trunk and numerous genital spines. c. Proboscis of a ♀, ventral view, showing the arrangement of the hooks. d. Base of proboscis of a ♀, lateral view, showing the spineless neck and the posterior and middle series of hooks. e. Anterior end of proboscis of a ♀ showing the bare tip. f. Trunk spines of the fore-trunk of a ♂, ventral view. g. Posterior end of a ♀ showing the trunk-spines that extend over the ventral surface as far as the gonopore. h. Posterior end of a ♂ with numerous genital spines.

Published as part of Leidenberger, Sonja, Boström, Sven & Wayland, Matthew T., 2019, Morphological observations on three Baltic species of Corynosoma Lühe, 1905 (Acanthocephala, Polymorphidae), pp. 1-19 in European Journal of Taxonomy 514 on page 10, DOI: 10.5852/ejt.2019.514, http://zenodo.org/record/2637577