Digital Image Collection of Desmids
Desmids are microscopic single-celled green algae with a typical symmetrical appearance. The cells are divided in two halves ('semicells') that are mirror images of each other and they show a remarkable variation in shape and ornamentation. Because desmids thrive in clear and nutrient poor freshwater, they gain increasing attention from ecologists for assessing and monitoring wetland areas.
Netrium digitus
Netrium digitus Itzigsohn & Rothe
Reference: Coesel & Meesters 2007
Remarks: Analysis of the cell size of Netrium digitus (see plot) reveals that Dutch material fall into three groups: a group with breadths of approx. 30 μm, a group with breadths of 40-50 μm, and a group with breadths of >60 μm. The length of the cell increases somewhat proportionally with the breadth. Besides this difference in size there appears also a variation in cell outline and a difference in the amount of ridges of the chloroplast, which can vary between 4 and 8. This is subject to further examination.
Reference: Coesel & Meesters 2007
Remarks: Analysis of the cell size of Netrium digitus (see plot) reveals that Dutch material fall into three groups: a group with breadths of approx. 30 μm, a group with breadths of 40-50 μm, and a group with breadths of >60 μm. The length of the cell increases somewhat proportionally with the breadth. Besides this difference in size there appears also a variation in cell outline and a difference in the amount of ridges of the chloroplast, which can vary between 4 and 8. This is subject to further examination.
Large size
 
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| 2010-016-001 Front view Netherlands |
2011-029-009 Front view Netherlands |
2011-029-009 Front view Netherlands |
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| 2011-029-007 Front view Netherlands |
2010-015-010 Front view Netherlands |
2011-031-007 Front view Netherlands |
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| 2011-032-002 Front view Netherlands |
2011-032-002 Front view Netherlands |
2005-005-004 Front view Netherlands |
Medium size
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| 2011-011-005 Front view Netherlands |
2011-018-012 Front view Netherlands |
2007-007-001 Front view Netherlands |
2011-006-018 Front view Netherlands |
2011-006-018 Front view Netherlands |
Small size
