Synonymy:
Cavernularia Degel., Acta horti gothoburgensis 12: 128 (1937)
Ceratophyllum M. Choisy, Bull. mens. Soc. linn. Soc. Bot. Lyon 20: 137 (1951)
Parmelia subgen. Hypogymnia Nyl., Flora, Regensburg 64(34): 537 (1881)

Position in classification:
Hypogymnia, Parmeliaceae, Lecanorales, Lecanoromycetidae, Lecanoromycetes, Ascomycota, Fungi

Note:
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