Echinoderms such as starfish are unusual for their five-fold body symmetry. Maps of gene-expression patterns show how this body plan was acquired, and that the genes specifying head structures do the ...
Taphonomy as an indicator of behavior among fossil crinoids / Tomasz K. Baumiller ... [et al.] -- Attachment, facies distribution, and life history strategies in crinoids from the Upper Ordovician of ...
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