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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.There are about 4,500 species, which range from 1 mm (0.039 in) to large freshwater forms more than 500 mm (20 in) long [3] or terrestrial species like Bipalium kewense which can reach 600 mm (24 in) in length.
Free-living turbellarians are mostly black, brown or gray, but some larger ones are brightly colored. [5] The Acoela and Nemertodermatida were traditionally regarded as turbellarians, [13] [19] but are now regarded as members of a separate phylum, the Acoelomorpha, [20] [21] or as two separate phyla. [22]
Phylum: Platyhelminthes. Class: Turbellaria. Order: Prolecithophora. Family: ... Pseudostomum klostermanni is a species of flatworms in the family Pseudostomidae. It ...
Planarians (triclads) are free-living flatworms of the class Turbellaria, [2] [3] order Tricladida, [4] which includes hundreds of species, found in freshwater, marine, and terrestrial habitats. [5] Planarians are characterized by a three-branched intestine, including a single anterior and two posterior branches. [5]
Rhabditophora (from rhabdito-, rhabdite + Greek-φορος [-phoros], bearer, i.e., "rhabdite bearers") is a subphylum (previously a class) of flatworms.It includes all parasitic flatworms (clade Neodermata) and most free-living species that were previously grouped in the now obsolete class Turbellaria.
Cestoda is a class of parasitic worms in the flatworm phylum (Platyhelminthes). Most of the species—and the best-known—are those in the subclass Eucestoda; they are ribbon-like worms as adults, commonly known as tapeworms. Their bodies consist of many similar units known as proglottids—essentially packages of eggs which are regularly shed ...
Trepaxonemata (from trepa-, spiral + axoneme) is a subclass of the Platyhelminthes or flatworms. [1] It includes all parasitic flatworms (clade Neodermata) and several free-living species that were previously grouped in the now obsolete class Turbellaria.
The Temnocephalida are an order of turbellarian flatworms. Unlike most other turbellarians, all the species in this order are either commensal or parasitic. They can be found living on crustaceans, molluscs, and, in some species, even turtles. The commensal species typically live in the gill or mantle cavities of their hosts, while the ...