sparganum

noun

spar·​ga·​num ˈspär-gə-nəm 

plural spargana -nə  also sparganums

: an intramuscular or subcutaneous vermiform parasite of various vertebrates including humans that is the plerocercoid larva of a tapeworm

—sometimes used as though a generic name when referring to such a larva

Sparganum mansoni is the larva of Spirometra mansoni