Sullivan, M.,
Frankovich, T.,
Lobban, C.,
Ashworth, M.
(2024).
Bacteriastrum.
In Diatoms of North America.
Retrieved June 16, 2025, from https://diatoms.org/genera/bacteriastrum
Centric
Bacteriastrum
Setae radial
Valves centric
Frustules joined in chains, with fused setae
Chloroplasts discoid, numerous
Rimoportula central
Bacteriastrum
is strictly planktonic and widely distributed in warm, temperate marine waters.
Living cells contain numerous, small discoid chloroplasts. Cells are joined in unbranched chains, in most species. Resting spores, which are formed endogenously, are known in a single species.
Valves are circular, formed from a central annulus....