Description: Thin sheets, but can exceed 5mm in thickness. Forms extensive irregular patches, to at least 30cm across. A bright, deep, sulphurous orange or bright yellow. The brightness is distinctive under water. Compact, fleshy. According to Topsent, 0.2 to 1mm in diameter and flush with the surface. ? not visible on collection ?

Distribution: Shetlands, Scarborough, South coast of UK, Guernsey, Roscoff. Frequent on vertical rock faces at Valentia Island, Co. Kerry, Ireland.

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

iNaturalist: Pseudosuberites sulphureus at iNaturalist World Species Observations database.