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[Hymenolepis diminuta] [Hymenolepis nana]

Adult Hymenolepis nana tapeworms. Adults measure 15-40 mm and have a small, rounded scolex at the anterior end. The scolex is knoblike with four suckers and a rostellum bearing 20-30 hooks.  The proglottids overlap (craspedote) and can be distinguished at the posterior, wider end.

A	B

A: Three adult specimens of H. nana.  Image courtesy of the Georgia Department of Public Health.
B: Scolex of H. nana in an unstained wet mount of stool.  Image courtesy of Dr. David Bruckner.

C

C: Higher magnification of the scolex in Figure B.  In this image, two of the suckers and the rostellar hooks are clearly visible.