(Porphyridium) (Porphyridium) is a biological genus in the family Porphyridiaceae and order Porphyridiales.
Porphyridium aerugineum
Porphyridium cruentum
Porphyridium purpureum
Chroothece
Flintiella
Petrovanella
Porphyridium
Rhodosorus
Vanhoeffenia