Ptychodactiaria
Ptychodactiaria (class Anthozoa, subclass Zoantharia) A small order, containing two genera, of coelenterates that have primitive musculature, nematocysts, and mesenterial structure (they lack ciliated tracts) in anemone-like polyps. They are often regarded as a family of the order Actiniaria.
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Ptychodactiaria