• Diplotomma pharcidium (Ach.) M. Choisy 

There are no records for this species at present.

This epiphytic member of the genus has recently been found in Ireland (Westmeath). Like D. alboatrum (described elsewhere), it has submuriform spores but unlike that species, possesses a conspicuous rim or exciple around the large flat disc. Examination of the spores shows that longitudinal divisions occur immediately to either side of the septum. Smooth nutrient-rich bark.

Key characteristics

  • On smooth nutrient-rich bark such as ash, poplar, willow; slightly frosted disc with distinctive exciple not unlike that of Buellia disciformis
  • Spores with longitudinal divisions either side of the septum.

Original text submitted by Vince J. Giavarini

 Simms, M. J., (2016). Diplotomma pharcidium (Ach.) M. Choisy . [In] LichenIreland. Accessed on 2019-05-23.