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echinoderm or something else?

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Around 1967 Jefferies launched his preliminary ideas on "calcichordates".

Many echinoderm specialists are not convinced by his ideas.

But: his interpretation of functional morphology makes sense,and his plate nomenclature has been taken onboard by at least some non-adherents of his theory.

Although NOT commonly found,in some parts they can be a significant part of the paleofauna.

Time to meet a fascinating group of animals!

NB:LARGE download,and validity of the link expires soon


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