Acolium sessile, Cyphelium sessile Caliciaceae
Acolium sessile (Cyphelium sessile) #

Lichenicolous fungus on Pertusaria coccodes
Chemical results: Only those of the host
Left and immediately below identified by Bryan Edwards, Vince Giavarini

Usually found on Pertusaria coccodes on old, well-lit oaks. Occasionally recorded from Pertusaria amara and P. albescens

Apothecia sessile, not pruinose, the discs black. Spores brown, 1-septate, constricted at septum, (10-)12-15 x 6-9 Ám. Micro photo below.

Similar: Cyphelium inquinans. K+ yellow > red and larger spores

Acolium sessile, Cyphelium sessile

Acolium sessile, Cyphelium sessile

Microscope photograph
Acolium sessile, Cyphelium sessile, spores
Acolium sessile (Cyphelium sessile)
On Pertusaria coccodes. Holton Lee, Dorset. March and April 2013

All images used are copyright. Please contact me if you find errors.