phyllidia

Noun

phyllidium (plural phyllidia)

1. A muscular, leaf-shaped or cuplike outgrowth from the lateral wall of the scolex of some cestodes.
   • The five species described above form an interesting series illustrating the gradual modification of the entire phyllidium into a sucker, just as individual loculi become modified into suckers.1927, Proceedings of the Zoological Society of London - Part 2, page 526

   Synonyms:

   bothridium

2. A rudimentary form of ctenidium found in some gastropods.