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| Polycladida Temporal range:
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|---|---|
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| Pseudobiceros bedfordi (Persian carpet flatworm) | |
Scientific classification 
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| Domain: | Eukaryota |
| Kingdom: | Animalia |
| Phylum: | Platyhelminthes |
| Subphylum: | Rhabditophora |
| Order: | Polycladida Lang, 1884 [1] |
| Suborder | |
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The Polycladida[1] represents a highly diverse clade of free-living marine flatworms. They are known from the littoral to the sublittoral zone (extending to the deep hot vents), and many species are common from coral reefs. Only a few species are found in freshwater habitats.
- ^ a b Lang, Arnold (1884). Die Polycladen (Seeplanarien) des Golfes von Neapel und der angrenzenden Meeresabschnitte. Eine Monographie. Fauna und Flora des Golfes von Neapel und der angrenzenden Meeresabschnitte, herausgegeben von der Zoologische Station in Neapel. Leipzig: W. Engelmann. p. 688.