Home›Class›Era First AppearedBrowse ByEra First AppearedFactsEra First AppearedSourcesComments (0)Reader Challenges (0)FactsComparisonTaxonomic Rank OrderWell-attested4 1Era First AppearedPrecambrianEra First Appeared5 entriesCambrianEra First Appeared19 entriesOrdovicianEra First Appeared10 entriesSilurianEra First Appeared7 entriesDevonianEra First Appeared8 entriesCarboniferousEra First Appeared3 entriesPermianEra First Appeared3 entriesTriassicEra First Appeared3 entriesJurassicEra First Appeared1 entryCretaceousEra First Appeared9 entriesPaleogeneEra First Appeared5 entriesNeogeneEra First Appeared1 entryQuaternaryEra First Appeared1 entrySources1. Wikipedia: Taxonomic ranktier 2WikipediaTaxonomic rank, Fundamental ranks section, rank sequence sentence, classQuote, Taxonomic rank, Fundamental ranks section, rank sequence sentence, classkingdom, phylum or division, class, order, family, genus, and speciesView the SourceComments (0)No comments yet. Be the first to share a thought.Sign in to join the discussion.Reader Challenges (0)No disputes yet. Spotted an error or a better source? Open the first one.Sign in to dispute this or suggest a correction.