• Ceratophyllum Gürich, 1896 † [Family: Rugosa (awaiting allocation)]
• Ceratophyllum Linnaeus, 1753 [Family: Ceratophyllaceae]
• Ceratophyllum M. Choisy, 1951 accepted as Hypogymnia (Nylander) Nylander, 1896 [Family: Parmeliaceae]
• Ceratophyllum apiculatum Cham. accepted as Ceratophyllum demersum L.
• Ceratophyllum australe Griseb. accepted as Ceratophyllum muricatum Cham.
• Ceratophyllum bitterianum (Zahlbr.) M. Choisy, 1951 accepted as Hypogymnia farinacea Zopf, 1907
• Ceratophyllum cristatum Spruce ex K. Schum. accepted as Ceratophyllum muricatum Cham.
• Ceratophyllum demersum L.
• Ceratophyllum echinatum Gray
• Ceratophyllum floridanum Fassett accepted as Ceratophyllum muricatum Cham.
• Ceratophyllum llerenae Fassett accepted as Ceratophyllum muricatum Cham.
• Ceratophyllum muricatum Cham.
• Ceratophyllum physodes (L.) M. Choisy, 1951 accepted as Hypogymnia physodes (L.) Nyl., 1896
• Ceratophyllum submersum L.
• Ceratophyllum tubulosum (Schaer.) M. Choisy, 1951 accepted as Hypogymnia tubulosa (Schaer.) Hav., 1918
• Ceratophyllum vittatum (Ach.) M. Choisy, 1951 accepted as Hypogymnia vittata (Ach.) Parrique, 1898