Dudresnaya is a genus of red algae.
The genus name of Dudresnaya is in honour of Guy-Ambroise Dudresnay (1770 - 1837), a French soldier interested in Botany and correspondent with Bonnemaison.
The genus was circumscribed by Théophile Bonnemaison in J. Phys. Chim. Hist. Nat. Arts Vol.94 on page 180 in 1822.
Dudresnaya contains the following species: