Spaulding, S.,
Metzeltin, D.
(2011).
Rhopalodia.
In Diatoms of North America.
Retrieved November 03, 2024, from https://diatoms.org/genera/rhopalodia
Epithemioid
Rhopalodia
Symmetry dorsiventral
Raphe positioned in dorsal keel
Valve faces nearly planar
Frustules of Rhopalodia have a strong dorsiventral symmetry. The raphe is positioned on the dorsal side of each valve in a shallow keel. The valve faces are nearly planar, that is, each frustule is shaped like 1/2 of an orange. The central endings of the raphe are expanded. The raphe is supported internally by costae. In contrast to...