Description: A recent addition to the lichen flora of Great Britain and Ireland, L. sorediata is currently known from the siliceous sea cliffs of South Kerry and Connemara, west Galway. It is easily overlooked for Dirina massiliensis f. sorediata or species of Peterjamesia, except that it forms smaller sterile crusts that are cream to white-pink in colour, instantly changing to crimson red when touched with a drop of bleach. It grows best on rock underhangs near the sea.

Key Identification Features:

• Thallus thin, without discs, cream or white-pink, never grey; usually in dense mosaics surrounded by a conspicuous network of black lines (thalline margins)
• Centrally, the thallus has a fine granular texture; the surface explodes with colour with a drop of bleach, C+ crimson-red (super-fast reaction).

Original text submitted by Vince J. Giavarini

Distribution Map from NBN: Ingaderia vandenboomii at National Biodiversity Network mapping facility, data for UK.

iNaturalist: Ingaderia vandenboomii at iNaturalist World Species Observations database.