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Fossil Collenia undosa from 2110 million year old banded iron formation, Biwabik, Minnesota
Scientific classification
Kingdom: Bacteria
Phylum: Cyanophyta
Family: Spongiostromata
Subfamily: Stromatolithi
Genus: Collenia
  • C. frequens
  • C. symmetrica
  • C. undosa

Collenia is genus of fossil cyanobacteria that form a particular type of stromatolites.[1]


  1. ^ Rich, Thomas H. V.; Fenton, Carroll Lane; Fenton, Mildred Adams; Rich, Pat Vickers (1996). The fossil book: a record of prehistoric life. New York: Dover Publications. ISBN 0-486-29371-8.