Codium

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Codium
Scientific classification
Kingdom:
Plantae
Division:
Chlorophyta
Class:
Bryopsidophyceae
Order:
Codiales
Family:
Codiaceae
Genus

Codium

Codium is a genus of seaweed in the Chlorophyta of the Order Bryopsidales.

Dead Man's Fingers (Codium fragile) off Massachusetts coast

Botanical description

Thalli dichotomously branched, erect or prostrate. Branched filaments form a compact spongy structure. Not calcareous. The final branches form a surface layer of close palisade cortex of utricles.

Taxonomy

A genus in the Chlorophyta.

There are 5 species in the British Isles: Codium adhaerens C.Agardh; Codium bursa (Linnaeus) C.Agardh; Codium fragile (Suringar) Hariot; Codium tomentosum Stackhouse and Codium vermilara (Olivi) Delle Chiaje.

Distribution

Ireland

Two of these species are very rare in Ireland. Codium adhaerens has been recorded from a few sites on the west coast and from Tory Island on the north coast in County Donegal. In 1837 it was found in Church Bay in County Antrim, but has not been found there since.

  • Codium adhaerens C.Agardh
  • Codium bursa (Linnaeus) C.Agardh; has been found in Mulroy Bay in County Donegal in 1977 (specimen in the Ulster Museum) and 1988. There is an old record of it from "near Belfast" between 1793 and 1810.
  • Codium fragile (Suringar) Hariot
    • Codium fragile (Suringar) Hariot subsp. atlanticum (A. Cotton) Silva
  • Codium tomentosum Stackhouse
  • Codium vermilara (Olivi) Delle Chiaje

There are other species of "doubtful validity":- Codium amphibium is included in Harvey's Phycologia Britannica Pl.xxxv. and noted as: "spreading in patches of great extent along the edge of the sea, over the surface of a turf-bog which meets the shore at Roundstone Bay" (Ireland).

Codium world-wide

  • Codium cuneatum S. & G. California (U.S.A.)
  • Codium duthiae Silva Australia, Tasmania and South Africa.
  • Codium extricatum Silva Cape Agulhas to southern Natal.
  • Codium fragile (Suringar) Hariot Japan, American Pacific from Alaska to Cape Horn, Australia and New Zealand, British Isles, Norway, Denmark and Netherlands.
  • Codium fragile (Suringar) Hariot subsp. capense Silva South Africa.
  • Codium hubbsii Daws. California (U.S.A.)
  • Codium johnstonei Silva California (U.S.A.)
  • Codium lucasi Setchell Australia, Tasmania.
  • Codium geppiorum Australia and Indo-PacificSouth Africa.
  • Codium spongiosum Australia.
  • Codium setchellii Gardn. Califirnis (U.S.A.)

References

  • Burrows, E.M. 1991. Seaweeds of the British Isles. Volume 2 Chlorophyta. Natural History Museum, London. ISBN 0-565-00981-8
  • Hardy, G. and Guiry, Michael D. 2006 A Check-list and Atlas of the Seaweeds of Britain and Ireland. British Phycological Society, London. ISBN 3-906166-35-X
  • Morton, O. 1978. Some interesting records of algae from Ireland. Ir. Nat. J. 19: 140 - 242.
  • Morton, O. 1994. Marine Algae of Northern Ireland. Ulster Museum, Belfast. ISBN 0 900771 28 8
  • Morton, O. 2003. The marine macroalgae of County Donegal, Ireland. Bull. Ir. biogeog. Soc. No.27: 3 - 164.
  • Parkes, Hilda M. 1975. Records of Codium species in Ireland. Proc. R.I.A., 75 B:123 - 134.
  • Silva, P.C. 1955. The dichotomous species of Codium in Britain. J. Mar. biol. Ass. U.K 24, 565 - 577.
  • Silva, P.C. and Irvine, D.E.G. 1960. Codium amphibium: a species of doubtful validity. J. mar. biol. Ass. U.K. 39: 631 - 636.

External links

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