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Cryptonemiales

plural noun
Cryp·​to·​ne·​mi·​a·​les | \ˌkriptəˌnēmēˈā(ˌ)lēz\

Definition of Cryptonemiales 

: an order of red algae (class Rhodophyceae) having the auxiliary cells borne on filaments that differ markedly from the vegetative filaments (as in lacking chromatophores and in being filled with dense protoplasm)

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History and Etymology for Cryptonemiales

New Latin, from crypt- + Greek nēma thread + New Latin -i- + -ales

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