Home›Amphibian Genera›Era First AppearedBrowse ByEra First AppearedFactsEra First AppearedSourcesComments (0)Reader Challenges (0)FactsComparisonTaxonomic Rank OrderWell-attested7 1Era First AppearedCretaceousEra First Appeared1 entryPaleogeneEra First Appeared5 entriesNeogeneEra First Appeared3 entriesQuaternaryEra First Appeared2 entriesSources1. Wikipedia: Taxonomic ranktier 2WikipediaTaxonomic rank, Fundamental ranks section, rank sequence sentence, amphibian generaQuote, Taxonomic rank, Fundamental ranks section, rank sequence sentence, amphibian generakingdom, 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.