Aulacoseira spp.
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Taxonomic Group: Diatom
Trophic Status: Autotrophic
Size Range: 5.7-7.5 μm wide x 20-22.8 μm long (LUMCON Guide)
Key Characteristics: Cells in linear colonies, joined together by several spines which are sometimes visible on terminal cells; frustules usually heavily silicified
Confused With: Species under Aulacoseira were previously classified in the genus Melosira, a genus now restricted primarily to marine species
Toxin: None known