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The Behavior and the Morphology of Sea Lilies with Shortened Stalks : Implications on the Evolution of Feather Stars(Animal Diversity and Evolution)
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Nakano Hiroaki
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Hibino Taku
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Hara Yuko
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Oji Tatsuo
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Amemiya Shonan
… Extant crinoids can be divided into two groups, stalked sea lilies and stalkless feather stars. … Feather stars are considered to have evolved from stalked ancestors by losing most of the stalk, but other differences are present between the two groups. … The unsegmented centrodorsal, long and curved cirri near the crown, small calyx, and the ability to swim are all feather star features not found in the sea lilies. …
Zoological science 19(8), 961-964, 2002-08-25
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