Clonophycus

Clonophycus is a genus of fossil microalgae whose type species, C. elegans, was described from the Barney Creek Formation of the McArthur Group in northern Australia, part of a temporal range that stretches from the Statherian into the Ediacaran, roughly 1.8 billion to 541 million years ago. Its precise biological nature is unsettled, with researchers uncertain whether known specimens represent cyanobacteria or true eukaryotic algae, and it is treated as being of uncertain taxonomic placement pending further study.