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      Cover image for A Review and Evaluation of Homology Hypotheses in Echinoderm Paleobiology
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      A Review and Evaluation of Homology Hypotheses in Echinoderm Paleobiology

      Colin D. Sumrall, Sarah L. Sheffield, Jennifer E. Bauer, Jeffrey R. Thompson, Johnny A. Waters

      The extraxial-axial theory (EAT) and universal elemental homology (UEH) are often portrayed as mutually exclusive hypotheses of homology within pentaradiate Echinodermata. The authors of this Element recommend these two hypotheses…

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