Encyclopedia of Life · EOL (see source)
Polycladida
Sign in to saveThe Polycladida 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.
Species
polyclades
Order
- PhylumPlatyhelminthes
- OrderPolycladida
ヒラムシ（扁虫、平虫）は、磯の石の下にすむ扁形動物渦虫鋼ヒラムシ目（多岐腸目）動物の総称。海産で、岩の表面等を這って生活している。一部には寄生種がある。 体は扁平で、表面は粘液で覆われている。頭部背面には触角のような突起を持つものがある。
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- Pseudobiceros hancockanus.jpg
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- Polycladida
- taxon name
- Polycladida
- taxon common name
- Πολύκλαδοι
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Article
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- Description
- Development
- Ecology
- Systematics
- Phylogeny
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The Polycladida 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.
== Description == Polyclads range from to in length with a flattened, roughly oval, body shape and, in many cases, a pair of short tentacles on the head. They are distinguished from other related animals by the presence of a folded pharynx, an elongated intestine with numerous complex diverticula, and multiple ocelli.