Description: With a crustose thallus and discs reminiscent of D. alboatrum (described elsewhere), this species occurs at scattered localities throughout coastal Ireland. The thallus, however, is much thicker than its relative, and often warted. This distinction is also reflected in its chemistry which is K+ yellow-red; Pd+ yellow-orange. It is drawn to mildly basic maritime rocks where candidate specimens should be tested freshly in the field with K. At scattered localities around Ireland.

Key Identification Features:

• Thallus similar to D. alboatrum but thicker and more warted, mildly basic shore rocks
• K+ yellow-red; Pd+ yellow-orange.

Original text submitted by Vince J. Giavarini

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

iNaturalist: Diplotomma chlorophaeum at iNaturalist World Species Observations database.