Tapeworms, the Cestoda, are flatworms that live as intestinal parasites in vertebrates and show anatomical and life history changes suited to parasitism. They belong to the Platyhelminthes, the simplest animals that are bilaterally symmetrical and have three fundamental cell layers. Like other flatworms they have no body cavity other than the gut and lack an anus. Flatworms were once divided into the mostly free-living Turbellaria, the parasitic flukes of the Trematoda, and the Cestoda, and the first two of these now seem likely to be paraphyletic. The wider Platyhelminthes have practically no fossil record.
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Tapeworms (Cestoda)
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UC Museum of Paleontology: Introduction to the Platyhelminthes
UC Museum of PaleontologyIntroduction to the PlatyhelminthesQuote, Introduction to the Platyhelminthes
The Cestoda, or tapeworms, are intestinal parasites in vertebrates
Wikipedia: Taenia solium
Has Member: Pork Tapeworm, LeadQuote, Has Member: Pork Tapeworm, Lead
Taenia solium, the pork tapeworm, belongs to the cyclophyllid cestode family Taeniidae.
Dipylidium (Wikipedia)
Has Member: Dipylidium caninum, LeadQuote, Has Member: Dipylidium caninum, Lead
Dipylidium caninum, also called the flea tapeworm, double-pored tapeworm, or cucumber tapeworm (in reference to the shape of its cucumber-seed-like proglottids, though these also resemble grains of rice or sesame seeds) is a cyclophyllid cestode that infects organisms afflicted with fleas and canine chewing lice,
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