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Procercoid |
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procercoid [prō′sər‚kȯid]
(invertebrate zoology) The solid parasitic larva of certain eucestodes, such as pseudophyllideans, that develops in the body of the intermediate host. Procercoid one of the larval stages of certain tapeworms (including the broad fish tapeworm). A procercoid is approximately 0.05 mm long and is spindle-shaped. The posterior end is distinct from the rest of the body and is equipped with three pairs of chitinoid hooklets. The procercoid stage is usually passed in the body cavity of copepods, which serve as the first intermediate hosts of many tapeworms. After the second intermediate host—a fish—swallows the parasitized copepod, the procercoid is converted in the fish’s body into the next larval stage—the plerocercoid. Want to thank TFD for its existence? Tell a friend about us, add a link to this page, add the site to iGoogle, or visit the webmaster's page for free fun content. |
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