Itaipusa riegeri 1978 Figs 55,56 55: Cuticular cirri in whole mount. 56: Section through distal part of copulatory organ with papilla, papillar cirrus and the biggest cuticular hook.
from Karling TG (1978) Anatomy and systematics of marine Turbellaria from Bermuda. Zool Scr 7:225-248.