Pyrenidium actinellum

are symbionts of

• Global Biotic Interactions: Baeomyces rufus (Huds.) Rebent.
• Global Biotic Interactions: Lecanora jamesii J. R. Laundon
• Global Biotic Interactions: Diploschistes caesioplumbeus (Nyl.) Vain.
• Global Biotic Interactions: Massalongia carnosa (Dicks.) Körb.
• Global Biotic Interactions: Leptogium teretiusculum

parasitize

• Global Biotic Interactions: Heterodermia leucomela
• Global Biotic Interactions: Diploschistes caesioplumbeus (Nyl.) Vain.
• Global Biotic Interactions: Anaptychia ciliaris (L.) Körb.
• Global Biotic Interactions: Leptogium teretiusculum
• Global Biotic Interactions: Baeomyces rufus (Huds.) Rebent.