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Bacillaria is a genus of algae that belongs to the class Bacillariophyceae, commonly known as diatoms. Diatoms are a major group of algae, characterized by their unique cell walls made of silica, called frustules. These organisms are found in a wide range of environments, including freshwater, marine, and soil habitats. The classification of algae is complex and subject to ongoing scientific debate, with different systems placing Bacillariophyceae within various divisions or even separate divisions.1234

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