Home›Other Invertebrate Genera›Era First AppearedBrowse ByEra First AppearedFactsEra First AppearedSourcesComments (0)Reader Challenges (0)FactsComparisonTaxonomic Rank OrderWell-attested7 1Era First AppearedCambrianEra First Appeared7 entriesSilurianEra First Appeared2 entriesDevonianEra First Appeared2 entriesCarboniferousEra First Appeared3 entriesPermianEra First Appeared1 entryCretaceousEra First Appeared2 entriesPaleogeneEra First Appeared1 entryNeogeneEra First Appeared1 entryQuaternaryEra First Appeared3 entriesSources1. Wikipedia: Taxonomic ranktier 2WikipediaTaxonomic rank, Fundamental ranks section, rank sequence sentence, other invertebrate generaQuote, Taxonomic rank, Fundamental ranks section, rank sequence sentence, other invertebrate 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.