Cosmarium amoenum Ralfs
Reference: Coesel & Meesters 2007
Remarks: Specimen with a more open sinus and straight, almost parallel sides are considered to belong to Cosmarium pseudamoenum Wille. In the material that I have studied this distinction was difficult to make.
Notice that the two rows of granules just under and above the sinus of specimen 2008004007 are well separated, while those of specimen 2011030027 are so close associated that the base of the granules are merged with each other.
C0667
2011051007
C0667
2011051007
C0667
2011051007
2011051-007
Front view
Netherlands
2011051-007
Apical view
Netherlands
2011051-007
Apical view
Netherlands
C0667
2008004007
C0667
2008004007
C0667
2008004007
2008004-007
Front view
Netherlands
2008004-007
Front view
Netherlands
2008004-007
Front view
Netherlands
C0667
2011030027
C0667
2011030027
C0667
2011030027
C0667
2011030027
2011030-027
Front view
Netherlands
2011030-027
Front view
Netherlands
2011030-027
Side view
Netherlands
2011030-027
Side view
Netherlands