Peyssonnelia

Peyssonnelia
Peyssonnelia squamaria
Scientific classification
Domain:	Eukaryota
(unranked):	Archaeplastida
Division:	Rhodophyta
Class:	Rhodophyceae
Order:	Gigartinales
Family:	Peyssonneliaceae
Genus:	Peyssonnelia Decaisne, 1841

Peyssonnelia is a genus of thalloid red alga comprising approximately 63 species. It includes the algae commonly known as rumoi-iwanokawa, mayoi-iwanokawa and akase-iwanokawa. Specimens can reach around 20 cm in size. Peyssonnelia produces tetraspores.

The genera Cruoriella and Cruoriopsis are sometimes considered to be part of Peyssonnelia, but a 2007 dissertation by Krayesky separates them.

The species currently recognised are:

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