Description: Encrusting, lobed with free margins, lobes up to 3 cms in diameter, convoluted with secondary lobes, overgrowing itself in parts. Concentric markings.

Habitat: Usually epiphytic on Corallina. Mid-littoral and sublittoral to 8 m.

Distribution: Widespread in the British Isles on western coasts. Europe: Mediterranean and the Netherlands. Further afield: Mauritania and the Canary Islands.

Key Identification Features:

• Thin leafy crusts epiphytic on Corallina.

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

iNaturalist: Mesophyllum lichenoides at iNaturalist World Species Observations database.

WoRMS: Mesophyllum lichenoides at World Register of Marine Species.