Systema naturæ - nature Universum - universe see [unranked] Mundus Plinius naturalia - natural bodies Regnum Lapideum - mineral kingdom Class Fossilia nom. inval. - Lapides aggregati Order Petrificata - fossils Genus Helmintholithus nom. inval. - fossil 'worms' Cornu ammonis nom. inval. see Helmintholithus Nautili compressi nom. inval.