Actinastrum sp.
Click on image to view photo information.
Taxonomic Group: Chlorophyte
Trophic Status: Autotrophic
Size Range: N/A
Key Characteristics: Cells much longer than broad, cylindrical, or cigar-shaped, radiating out from a common center to form colonies of 4-8-16-cells; chloroplast is elongate, parietal, with one pyrenoid
Confused With: At first glance this could be mistaken for a diatom like Asterionellopsis glacialis or Thalassionema frauenfeldii, but closer examination shows cigar-shaped cells radiating out three dimensionally from a central point
Toxin: None known