fern family vs family Isoetaceae

Other hyponyms of fern family include family Hymenophyllaceae, Hymenophyllaceae, family Osmundaceae, Osmundaceae, family Schizaeaceae, Schizaeaceae, family Marsileaceae, Marsileaceae, family Salviniaceae, Salviniaceae, Azollaceae, family Azollaceae, family Ophioglossaceae, Ophioglossaceae, family Gleicheniaceae, Gleicheniaceae, family Parkeriaceae, Parkeriaceae, family Polypodiaceae, Polypodiaceae, Adiantaceae, family Adiantaceae, family Vittariaceae, Vittariaceae, Aspleniaceae, family Aspleniaceae, Blechnaceae, family Blechnaceae, Cyatheaceae, family Cyatheaceae, Davalliaceae, family Davalliaceae, Dennstaedtiaceae, family Dennstaedtiaceae, Dicksoniaceae, family Dicksoniaceae, Athyriaceae, Dryopteridaceae, family Athyriaceae, family Dryopteridaceae, family Lomariopsidaceae, Lomariopsidaceae, family Lophosoriaceae, Lophosoriaceae, family Loxomataceae, Loxomataceae, family Oleandraceae, Oleandraceae, family Pteridaceae, Pteridaceae, family Marattiaceae, Marattiaceae, family Psilotaceae, Psilotaceae, family Psilophytaceae, Psilophytaceae, family Rhyniaceae, Rhyniaceae, Equisetaceae, family Equisetaceae, horsetail family, family Lepidodendraceae, Lepidodendraceae, clubmoss family, family Lycopodiaceae, Lycopodiaceae, family Selaginellaceae, Selaginellaceae, Isoetaceae, quillwort family, Cryptogrammataceae, family Cryptogrammataceae, family Thelypteridaceae, Thelypteridaceae.