Overview

Comprehensive Description

Description

 One of the larger red seaweeds, Dilsea carnosa plants are tough and leathery. Several dark reddish brown, flat, blades gradually expand from a single disc shaped holdfast, and have short cylindrical stipes. The blades do not have a midrib or veins and are simple wedge or spoon shaped. The blades can be 15-30 cm long and 5-20 cm wide. Older blades may be split from the margin towards the base but the rounded oblong (obovate) shape of the blade is never quite lost.Sometimes confused with Palmaria palmata and mistakenly called dulse.
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Description

Thallus a broad oval frond arising from a discoid holdfast the short stipe expanding into a thick flat frond up to 50 cms long and 10 cms or so broad. Leatherly and deep blood red in colour, older fronds often split down to the stipe. Palmaria palmata, the edible "Dulse" is vaguely similar, however Dilsea is much more leatherly and less branched.
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Source: Encyclopedia of Marine Life of Britain and Ireland

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Distribution

Around the British Isles including the Shetlands and the Channel Islands. Europe: Portugal, Spain, France, the Baltic, Norway, Spitzbergen and Iceland.
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Ecology

Habitat

Depth range based on 256 specimens in 1 taxon.
Water temperature and chemistry ranges based on 30 samples.

Environmental ranges
  Depth range (m): 0 - 26
  Temperature range (°C): 11.353 - 12.348
  Nitrate (umol/L): 4.729 - 7.121
  Salinity (PPS): 35.008 - 35.363
  Oxygen (ml/l): 6.069 - 6.346
  Phosphate (umol/l): 0.335 - 0.482
  Silicate (umol/l): 2.315 - 3.727

Graphical representation

Depth range (m): 0 - 26

Temperature range (°C): 11.353 - 12.348

Nitrate (umol/L): 4.729 - 7.121

Salinity (PPS): 35.008 - 35.363

Oxygen (ml/l): 6.069 - 6.346

Phosphate (umol/l): 0.335 - 0.482

Silicate (umol/l): 2.315 - 3.727
 
Note: this information has not been validated. Check this *note*. Your feedback is most welcome.

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 Usually found in the lower littoral to shallow sublittoral attached to rocks.
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Common. Epilithic in deep rock pools of the low littoral into the sublittoral to depths of more than 35 m.
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Associations

Foodplant / parasite
Mycaureola dilseae parasitises thallus of Dilsea carnosa

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Molecular Biology and Genetics

Molecular Biology

Barcode data: Dilsea carnosa

The following is a representative barcode sequence, the centroid of all available sequences for this species.


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Source: Barcode of Life Data Systems (BOLD)

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Statistics of barcoding coverage: Dilsea carnosa

Barcode of Life Data Systems (BOLDS) Stats
Public Records: 3
Specimens with Barcodes: 15
Species With Barcodes: 1
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Wikipedia

Dilsea carnosa

Dilsea carnosa, in Carantec

Dilsea carnosa, commonly known as the poor man's weather glass or the sea belt, is a species of red algae in the Dumontiaceae family of the order Gigartinales.

Taxonomy[edit]

The species was first described scientifically by Schmidel in 1794, under the name Fucus carnosus. The German botanist Otto Kuntze transferred the species to Dilsea in 1898.[1]

References[edit]

  1. ^ Kuntze, O. (1898). Revisio generum plantarum. Part 3 (3). pp. 1-576. Leipzig, London, Milano, New York, Paris: Arthur Felix, Dulau & Co., U. Hoepli, Gust. A. Schechert, Charles Klincksierck.
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