Crinozoa definitions

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Crinozoa

Crinozoa logo #10101) Living fossil
Found on https://www.crosswordclues.com/clue/crinozoa

Crinozoa

Crinozoa logo #21003(from the article `echinoderm`) ...Ordovician to Lower Devonian about 400,000,000–500,000,000 years ago; theca globular; respiratory structures pairs of pores.Subphylum CrinozoaBoth ...
Found on http://www.britannica.com/eb/a-z/c/159
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