Seilacher and MacClintock (2005) have presented scenarios for the functional morphology of the attachment structures of a number of Paleozoic crinoid taxa. Their interpretations include many with which echinoderm workers will agree, but there also are some that will raise eyebrows. The concept of the ecology of extant stalked crinoids was revised completely when Macurda and Meyer (1974) demonstrated that they are rheophiles, not rheophobes as previously envisaged. It is now recognized that isocrinines can relocate by crawling with their arms (Messing et al., 1988), can regenerate the crown following autotomy (Amemiya and Oji, 1992), have...

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