Bacteriastrum

Bacteriastrum is a genus of marine diatoms, which are a type of single-celled algae belonging to the phylum Bacillariophyta. These microorganisms are characterized by their intricate silica cell walls, known as frustules. Bacteriastrum frustules are typically cylindrical and often appear in chains or colonies. A distinguishing feature of this genus is the presence of characteristic radiating spines or pseudocilia that project from the ends of the cells, helping to connect them in colonial arrangements. These spines are usually solid and unbranched. The arrangement and morphology of these spines are important taxonomic characteristics for identifying different species within the Bacteriastrum genus. Bacteriastrum species are found in various marine environments worldwide, particularly in coastal waters and estuaries. They play a role in primary production, forming the base of some marine food webs and contributing to the global carbon cycle through photosynthesis. Like other diatoms, Bacteriastrum reproduces both sexually and asexually. Their siliceous frustules contribute to marine sediments, and fossilized forms can be found in geological records, providing insights into past ocean conditions.