The flatworm classes are the traditional divisions of the Platyhelminthes, which were once split into three groups. The Turbellaria are mostly free-living and found in oceans, fresh water and moist land, with a few parasites. The Trematoda, or flukes, are all parasitic with complex life cycles, and the Cestoda, or tapeworms, are intestinal parasites in vertebrates. Recent studies suggest the first two are paraphyletic, and that the Platyhelminthes as a whole may even be polyphyletic, so most flatworms may belong to the Lophotrochozoa while the rest sit near the base of animal diversity.
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Flatworm Classes
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Sources
UC Museum of Paleontology: Introduction to the Platyhelminthes
UC Museum of PaleontologyIntroduction to the PlatyhelminthesQuote, Introduction to the Platyhelminthes
Flatworms were once divided into three groups.
Wikipedia: Turbellaria
Has Member: Turbellaria, LeadQuote, Has Member: Turbellaria, Lead
The Turbellaria are one of the traditional sub-divisions of the phylum Platyhelminthes (flatworms), and include all the sub-groups that are not exclusively parasitic.
Wikipedia: Cestoda
WikipediaHas Member: Cestoda, LeadQuote, Has Member: Cestoda, Lead
Cestoda is a class of parasitic worms in the flatworm phylum (Platyhelminthes).
Wikipedia: Trematoda
WikipediaHas Member: Trematoda, LeadQuote, Has Member: Trematoda, Lead
Trematoda is a class of flatworms known as trematodes, and commonly as flukes.
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