Ertz, D./ Diederich, P. 2007: Revision of the Opegrapha species with muriform ascospores (previously Dictyographa) (lichenized Roccellaceae). - Lichenologist39(2): 143-151. [RLL List # 206 / Rec.# 28610] Keywords: OPEGRAPHA/ DICTYOGRAPHA/ ARTHONIALES/ GRAPHIDACEAE/ HYSTERIACEAE/ SYNONYMS
Abstract: [Recognition of two species formerly in Dictyographa, Opegrapha arabica and O. varians; key. Several species are placed in synonymy while others are excluded.