Chondracanthus acicularis (Roth) Fredericq
Also known as Gigartina acicularis
Description: Cartilaginous, cylindrical, purple-red or
blackish fronds, to 100 mm long, irregularly bipinnately
branched, branches curved, sharply pointed. Base discoid, often
stoloniferous.
Habitat: On rocks, lower intertidal, generally uncommon
but may be locally common on sheltered, silty shores in the
lower intertidal, southern and western shores reaching its
northern limit on the mid-western Irish coast.
Similar species: Gigartina pistillata (S.G.
Gmelin) Stackhouse, a very uncommon species except in the lower
intertidal of south-western English shores north to
Penbrokeshire and Co. Waterford, Ireland, forms pinnately
branched ultimate branches and is not stoloniferous.
Chondracanthus teedei (Roth) Kützing (formerly
Gigartina teedei) is brownish red in colour, distinctly
compressed, regularly pinnately branched, and occurs in a few
localities on the south and west coasts of Britain and
Ireland.
Link:
Algaebase
Photographs © M.D. Guiry
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