Dotyophycus is a genus of red algae, from the family Liagoraceae, characterised by a "terete, dichotomously divided, calcified thallus.

"[1] It can be recognised by its reproductive features, particularly the gonimoblast that follows fertilization and the absence of sterile cells in mature cystocarp.

Visually it is distinguished by its "almost creamy-white" appearance derived from its outer mucilage and calcification.

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