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cyanobacteria  search
NTRenalcis
UFblue algae
 blue-green algae
 Cyanophyta
 Schizophyta
RTmicrofossils
 algae
 algal mats
 lichens
 stromatolites
 thallophytes
 prokaryotes
 Collenia
SNUsed for Schizophyta which includes blue and blue-green algae. Before 1998, algae was a broader term. For paleontologic studies, index microfossils. Index algae if applicable.