Spaulding, S.,
Edlund, M.
(2009).
Actinella.
In Diatoms of North America.
Retrieved November 21, 2024, from https://diatoms.org/genera/actinella
Eunotioid
Actinella
Valves distinctly asymmetric
Raphe highly reduced
Helictoglossae distinct
Spines present
Cells of Actinella grow singly, or in small colonies that are joined by mucilage secreted at the narrow ends of the cells. Valves are distinctly asymmetric to the apical and transapical axes. The raphe is highly reduced and is restricted to the ventral margins of valves. Helictoglossae are distinct as dark, silicious thickenings on the...