Spaulding, S.
(2010).
Epithemia.
In Diatoms of North America.
Retrieved May 01, 2026, from https://diatoms.org/genera/epithemia?x-craft-preview=cab8b13ef68d1e257235fd2491770f51dfe0c9a6c0ad3b95411776e5316d603alxhbyabypv
Epithemioid
Epithemia
Raphe eccentric, positioned along ventral margin
Raphe opens internally into a canal
Areolae complex
Epithemia has an eccentric raphe system, positioned along the ventral margin. Each branch of the raphe is arched toward the dorsal margin. Externally, the proximal raphe slits terminate in expanded ends, while internally, the raphe slit is continuous through the central nodule. The raphe is also supported internally by large, transapical...