Ceramiales

thumb|right|Acrosorium uncinatum Ceramiales is an order of red algae. It was established by Friedrich Oltmanns in 1904.

Delesseria is a genus of red algae belonging to the family Delesseriaceae.

thumb|right|Wrangelia penicillata at 2m depth. thumb|Ptilota eatoni Dickie, now Plumariopsis eatonii (Dickie) De Toni 1 partial frond, 2 section of stem with young branch, 3 tip of full-grown branch, 4 branch tip with sphaerospores, 5 sphaerospores.

Callithamniaceae is a family of red algae (Rhodophyta) in the order Ceramiales. The family was first described by Friedrich Traugott Kützing in 1843.

Aglaothamnion is a genus of algae belonging to the family Callithamniaceae.

Crouania is a genus of red algae (Rhodophyta) in the Callithamniaceae family. The name of the genus honours the French born Crouan brothers, Pierre-Louis Crouan (1798 - 1871) and Hippolyte-Marie Crouan (1802 - 1871). It was first described by Jacob Georg Agardh in 1842, and the type species is Crouania attenuata.

Griffithsia is a genus of red algae in the family Wrangeliaceae.

genus of algae

Wrangelia is a genus of red algae in the family Wrangeliaceae.

Gymnothamnion is a red alga genus in the family Wrangeliaceae.

Callithamnion is a genus of algae belonging to the family Callithamniaceae.

Choreocolax is a genus of red algae in the order Ceramiales