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Overview

Brief Summary

If you use a magnifying glass, you will see where this seaweed got its name. The branches have a banded color. You can even see this in the photo above. And each branch has a claw-like tip, sort of like horns. Banded weeds is found attached to rocks and other seaweeds anywhere between the high tide line or deeper. Many seaweeds are used by humans in various ways and banded weeds is no exception. Experiments are being done with an extract from banded weeds for curing influenza virusses.
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Comprehensive Description

Description

 A small red seaweed growing up to 30 cm tall. It has a filamentous frond that is irregularly and dichotomously branched, with the branches narrowing towards pincer-like tips. The holdfast is a minute conical disc that extend into a dense mass of rhizoidal filaments. The plant is reddish-brown to purple in colour and has a banded appearance when viewed closely.Discrimination of separate species of Ceramium is often difficult. This species can be identified with certainty only by careful microscopic observation and in the field can be easily confused with other species of Ceramium with similar morphology namely Ceramium botryocarpum, Ceramium pallidum and Ceramium secundatum (F. Rindi, pers. comm.). The above taxonomy uses the recent nomenclature from Hardy & Guiry (2003). The confusion concerning Ceramium nodulosum and Ceramium rubrum was discussed by Maggs et al. (2002).
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Source: Marine Life Information Network

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Physical Description

Type Information

Type locality: Ste, HŽrault, Mediterranean France
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Type locality: South Harbour, Helgoland, North Sea
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Type locality: DÕEstrees Bay, Kangaroo Island, South Australia
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Type locality: Ste, HŽrault, Mediterranean France
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Type locality: South Harbour, Helgoland, North Sea
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Type locality: DÕEstrees Bay, Kangaroo Island, South Australia
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Type for Ceramium virgatum Roth
Catalog Number: US
Collection: Smithsonian Institution, National Museum of Natural History, Department of Botany
Preparation: Specimen/Lot
Collector(s): A. Griffiths
Year Collected: 1846
Locality: Torquay., Devon, England, Great Britain, Europe
  • Type:
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Type for Ceramium virgatum Roth
Catalog Number: US
Collection: Smithsonian Institution, National Museum of Natural History, Department of Botany
Preparation: Specimen/Lot
Collector(s): A. Griffiths
Year Collected: 1846
Locality: Torquay., Devon, England, Great Britain, Europe
  • Type:
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© Smithsonian Institution, National Museum of Natural History, Department of Botany

Source: National Museum of Natural History Collections

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Type for Ceramium virgatum Roth
Catalog Number: US
Collection: Smithsonian Institution, National Museum of Natural History, Department of Botany
Preparation: Specimen/Lot
Collector(s): A. Griffiths
Year Collected: 1845
Locality: Torquay, Devon, England, Great Britain, Europe
  • Type:
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© Smithsonian Institution, National Museum of Natural History, Department of Botany

Source: National Museum of Natural History Collections

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Possible type material for Ceramium repens Harv.
Catalog Number: US
Collection: Smithsonian Institution, National Museum of Natural History, Department of Botany
Verification Degree: Status verified from secondary sources
Preparation: Specimen/Lot
Collector(s): F. von Mueller
Locality: Port Phillip (Port Philip)., Victoria, Australia, Australasia
  • Possible type material: Harvey, W. H. 1863. Phycologia Australica. 5: XLVIII.
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© Smithsonian Institution, National Museum of Natural History, Department of Botany

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Lectotype fragment for Ceramium virgatum Roth
Catalog Number: US
Collection: Smithsonian Institution, National Museum of Natural History, Department of Botany
Preparation: Specimen/Lot
Collector(s): J. de Grateloup
Locality: Unknown
  • Lectotype fragment: Agardh, C. A. 1824. Systema Algarum. 141.
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Possible type material for Ceramium repens Harv.
Catalog Number: US
Collection: Smithsonian Institution, National Museum of Natural History, Department of Botany
Verification Degree: Status verified from secondary sources
Preparation: Pressed specimen
Collector(s): F. von Mueller
Locality: Port Phillip (Port Philip)., Victoria, Australia, Australasia
  • Possible type material: Harvey, W. H. 1863. Phycologia Australica. 5: XLVIII.
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Lectotype fragment for Ceramium virgatum Roth
Catalog Number: US
Collection: Smithsonian Institution, National Museum of Natural History, Department of Botany
Preparation: Pressed specimen
Collector(s): J. de Grateloup
Locality: Unknown
  • Lectotype fragment: Agardh, C. A. 1824. Systema Algarum. 141.
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© Smithsonian Institution, National Museum of Natural History, Department of Botany

Source: National Museum of Natural History Collections

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Ecology

Habitat

Depth range based on 157 specimens in 1 taxon.
Water temperature and chemistry ranges based on 8 samples.

Environmental ranges
  Depth range (m): 0 - 34.75
  Temperature range (°C): 11.471 - 12.348
  Nitrate (umol/L): 4.729 - 5.063
  Salinity (PPS): 35.203 - 35.363
  Oxygen (ml/l): 6.138 - 6.200
  Phosphate (umol/l): 0.336 - 0.421
  Silicate (umol/l): 2.315 - 2.578

Graphical representation

Depth range (m): 0 - 34.75

Temperature range (°C): 11.471 - 12.348

Nitrate (umol/L): 4.729 - 5.063

Salinity (PPS): 35.203 - 35.363

Oxygen (ml/l): 6.138 - 6.200

Phosphate (umol/l): 0.336 - 0.421

Silicate (umol/l): 2.315 - 2.578
 
Note: this information has not been validated. Check this *note*. Your feedback is most welcome.
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 Ceramium virgatum is both epilithic and epiphytic, often growing on the stipes and fronds of Fucus spp., Mastocarpus stellatus and Laminaria hyperborea as well as on the leaves of Zostera marina in the subtidal. It is frequent on Codium fragile subsp. Tomentosoides in intertidal rockpools (F. Rindi, pers. comm.).
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Source: Marine Life Information Network

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Molecular Biology and Genetics

Molecular Biology

Statistics of barcoding coverage: Ceramium virgatum

Barcode of Life Data Systems (BOLDS) Stats
Public Records: 0
Specimens with Barcodes: 168
Species With Barcodes: 1
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Source: Barcode of Life Data Systems (BOLD)

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