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Polysiphonia ceramiaeformis

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Species of alga

Polysiphonia ceramiaeformis
Samples of Polysiphonia ceramiaeformis algae
Scientific classification Edit this classification
Clade: Archaeplastida
Division: Rhodophyta
Class: Florideophyceae
Order: Ceramiales
Family: Rhodomelaceae
Genus: Polysiphonia
Species: P. ceramiaeformis
Binomial name
Polysiphonia ceramiaeformis
P.Crouan & H.Crouan

Polysiphonia ceramiaeformis, also called banded siphon weed, is a small red algae (Rhodophyta), in the genus Polysiphonia. Individuals are irregularly branched with the branches extending up to 5.5 centimetres (2.2 in) from a central node and ending in dense tufts of fibres.

Description

This small red algae lacks a clearly to be seen main axis. Each branch is formed of axial cells with 10 - 12 periaxial cells of equal length, with forcipate incurved tips. It is densely branched and attached by tangled prostrate axes. All axes are ecorticate. The rhizoids are numerous

Reproduction

The plants are dioecious. The alga bears spermatangial branches on a cylindrical axis. Cystocarps are oval with a narrow ostiole. The tetraspores cells divide to forms cells in fours, these occur in a spiral series.

Habitat

In pools at low water in sheltered sites.

Distribution

Very rare on the British Isles. Recorded from a few sites in Dorset, also recorded from north west France and the Mediterranean.

References

  1. "Algae Base: Polysiphonia ceramiiformis P.Crouan & H.Crouan". Retrieved 31 January 2017.
  2. ^ Maggs, C.A. and Hommersand, M.H. 1993. Seaweeds of the British Isles Volume 1. Rhodophyta Part 3A Ceramiales. The Natural History Museum, London ISBN 0-11-310045-0
  3. Jones, W.E. 1964(4) A key to the genera of the British seaweeds. Field studies (reprinted pp 1-32
  4. Hardy, F.G. and Guiry, M.D. 2003. A Check-list and Atlas of the Seaweeds of Britain and Ireland. The British Phycological Society. ISBN 0-9527115-16
  5. Batters, E.A.L. 1902. A Catalogue of The British Marine Algae. supplement to Journal of Botany 1902 pp.80 - 81
Taxon identifiers
Polysiphonia ceramiaeformis


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