Phylum Echinodermata
Phylum Echinodermata
Phylum Echinodermata
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Eldonia, Portalia and Redoubtia, all known from the Burgess Shale have originally<br />
been described as holothourians<br />
Eldonia is now considered to be a jelly fish<br />
Portalia and Redoubtia is of uncertain affinity (polychaete or sponge?)<br />
Eldonia ludwigi Middle Cambrian<br />
<strong>Echinodermata</strong> – classification – Problematica
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