| Ceramium echionotum | |
|---|---|
 | |
Scientific classification  | |
| (unranked): | Archaeplastida |
| Division: | Rhodophyta |
| Class: | Florideophyceae |
| Order: | Ceramiales |
| Family: | Ceramiaceae |
| Genus: | Ceramium |
| Species: | C. echionotum |
| Binomial name | |
| Ceramium echionotum J.Agardh | |
Ceramium echionotum is a small marine alga in the division Rhodophyta.
This is a small branched alga no more than 15 cm long. [1] It consists of large cells forming erect cylindrical filaments which are basically monosiphonous. At the nodes where the large axial cells meet there is cortication by small cells ascending and descending, these give a banded effect. The thalli grow in a rather tangled manner, matted at the base by rhizoids. The main branches are strongly rolled in at their apices and unicellular spines develop on the outer sides of the branches. [1] [2] The species is similar to Ceramium shuttleworthianum , Ceramium ciliatum and Ceramium gaditanum all of which have spines. In the British Isles, only Ceramium echionotum has spines formed of single cells which grow on the cortical bands. [1] [3] [4]
Recorded in Ireland in the north-west [5] and the north-east. [6] [4] Recorded from the east of Scotland, England, Isle of Man, [4] the Channel Isles, Norway, the Canary Isles and the Azores. [1]
The species is dioecious producing spermatangia, carposporangia and tetraspores. [1]
Ceramium is a genus of Ceramium algae. It is a large genus with at least 15 species in the British Isles.
Ceramium diaphanum is a species of marine red algae.
Polysiphonia denudata is a small red alga, Rhodophyta, growing as tufts up to 20 cm long without a main branch axis.
Polysiphonia elongella Harvey in W.J. Hooker is a branched species of marine red algae in the genus in the Polysiphonia in the Rhodophyta.
Polysiphonia fibrata is a species of Polysiphonia that grows as small dense tufted and finely branched marine alga in the Rhodophyta.
Melanothamnus harveyi, Harvey's siphon weed, is a small marine red alga in the division of Rhodophyta.
Ceramium botryocarpum is a small red marine alga in the Division Rhodophyta.
Ceramium flaccidum is a small red marine alga in the Division Rhodophyta.
Ceramium ciliatum is a small marine red alga in the Division Rhodophyta.
Ceramium cimbricum is a small red alga in the division Rhodophyta.
Ceramium deslongchampsii is a small marine red alga in the Division Rhodophyta.
Ceramium gatitanum is a small marine red alga.
Ceramium nodulosum is a small red marine alga. There is confusion surrounding this name.
Ceramium secundatum is a small marine red alga.
Ceramium shuttleworthianum is a small marine red alga.
The taxon Ceramium siliquosum is a small marine alga. It belongs to the red algae genus Ceramium.
Ceramium strictum is a small marine red alga.
Ceramium circinatum is a small marine red algae.
Ceramium virgatum, or the red hornweed, is a small red marine alga.
Gymnogongrus griffithsiae is a small uncommon seaweed.