bothridium

bothridium

[bä′thrid·ē·əm]
(invertebrate zoology)
A muscular holdfast organ, often with hooks, on the scolex of tetraphyllidean tapeworms.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.
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Costula short, extending anteriorly from base of bothridium towards lamellar setae but not reaching lamellar setae, strongly arcuate.