Gregorella is a genus of lichenized fungi in the family Arctomiaceae.

[2] This is a monotypic genus, containing the single species Gregorella humida.

[3] The genus and species were circumscribed by Helge Thorsten Lumbsch in Lichenologist vol.37 on page 298 in 2005.

[1] The genus name of Gregorella is in honour of Dieter Gregor Zimmermann (b.1942), a German musician and (amateur) Lichenologist.

"The new genus is described in honour of Dieter Gregor Zimmermann (Düsseldorf) who first introduced HTL to this fascinating lichen in the field.