Biology
provided by Diatom LifeDesk
C. convolutus is a species of diatom associated with fish kills, but not known to be harmful to humans (Horner et al. 1997).
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- Thessen, Anne
Distribution
provided by Diatom LifeDesk
C. convolutus is present on the west coast of North America (Horner et al. 1997).
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- Thessen, Anne
Toxicity
provided by Harmful Phytoplankton Project
No direct toxic effects are known, however, Chaetoceros convolutus is known to have caused deaths of farmed salmon by becoming lodged in fish gills using barbed setae. The spiny setae are regarded as the injurious part of the cell, in fact the whole genus may be harmful to fish.
- bibliographic citation
- Guide to UK Coastal Planktonic Ciliates © 2001 DJS Montagnes, University of Liverpool http://www.liv.ac.uk/ciliate/
- author
- David J.S. Montagnes
Brief Summary
provided by Harmful Phytoplankton Project
Chaetoceros concavicornis and C. convolutus are very similar morphologically and both have a very variable morphology. Rines and Hargraves (1988) suggest the variation is the result of environmental variation and that therefore, these two species cannot be separated reliably until the effect of environmental conditions on morphology has been determined.
- Rines, JEB., & Hargraves PE. 1988. The Chaetoceros Ehrenberg (Bacillariophyceae) flora of Narragansett Bay, Rhode Island, USA. Bibliotheca Phycologica 79:1-196.
- Hustedt, F. 1930. Die Kieselalgen Deutschlands, ísterreichs und der Schweiz. Dr. L. Rabenhorsts, Kryptogamen-Flora von Deutschland, ísterreich und der Schweiz 7(1):1-920.
- bibliographic citation
- Guide to UK Coastal Planktonic Ciliates © 2001 DJS Montagnes, University of Liverpool http://www.liv.ac.uk/ciliate/
- author
- David J.S. Montagnes
Diagnostic Description
provided by Harmful Phytoplankton Project
Cells form small loose chains, sometimes twisted around the perivalvar. Cells are heterovalvate. The anterior valve is highly vaulted and the posterior valve is flat. Intercalary setae on the rounded valve arise from close to the valve centre but the two setae do not touch each other. They extend first along the perivalvar axis but then bend backwards. Intercalary setae are foursided, forming longitudinal ridges which carry small spines. In C. convolutus the anterior intercalary setae have a short basal part that wraps around the setae on the sister posterior valve. But there is no fusion of setae.
- bibliographic citation
- Guide to UK Coastal Planktonic Ciliates © 2001 DJS Montagnes, University of Liverpool http://www.liv.ac.uk/ciliate/
- author
- David J.S. Montagnes
Distribution
provided by Harmful Phytoplankton Project
C.convolutus is a cosmopolitan species, typical of temperate waters.
- bibliographic citation
- Guide to UK Coastal Planktonic Ciliates © 2001 DJS Montagnes, University of Liverpool http://www.liv.ac.uk/ciliate/
- author
- David J.S. Montagnes
Comprehensive Description
provided by Harmful Phytoplankton Project
Chaetoceros convolutus forms short chains. The cells are heterovalvate with long barbed setae, arising from close to the centre of the valve.
- bibliographic citation
- Guide to UK Coastal Planktonic Ciliates © 2001 DJS Montagnes, University of Liverpool http://www.liv.ac.uk/ciliate/
- author
- David J.S. Montagnes
Diet
provided by World Register of Marine Species
phytosynthetic
North-West Atlantic Ocean species (NWARMS)
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- WoRMS Editorial Board
Distribution
provided by World Register of Marine Species
Probably cosmopolitan , more common in temperate waters.
North-West Atlantic Ocean species (NWARMS)
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- cc-by-4.0
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- WoRMS Editorial Board
Habitat
provided by World Register of Marine Species
pelagic or attached to various marine life
North-West Atlantic Ocean species (NWARMS)
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- cc-by-4.0
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- WoRMS Editorial Board
Morphology
provided by World Register of Marine Species
yellow brown in color, not green
North-West Atlantic Ocean species (NWARMS)
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- cc-by-4.0
- copyright
- WoRMS Editorial Board