Spaulding, S.,
Edlund, M.
(2008).
Meridion.
In Diatoms of North America.
Retrieved November 21, 2024, from https://diatoms.org/genera/meridion
Araphid
Meridion
Valve symmetry to the transverse axis variable
Frustules linear to wedge-shaped in girdle view
Frustules may be joined in colonies
Costae present
Valves of Meridion are variable in symmetry to the transverse axis; they are either strongly heteropolar or isopolar. The heteropolar species are clavate (club-shaped) in valve view and wedge-shaped in girdle view. Septae (attached to girdle elements) are present. An apical porefield is present at one end. Valves may have 1-2...