Ann. Bot. Fenn. 39, 3: 226 (2002).

Basionym: Leproloma diffusum J. R. Laundon, Lichenologist 21: 16 (1989) "Finlandia; lääni Oulu, Paltamo, Melalahti, Viilonkallio, ad rupem dolomiticam, 11 October 1959, A. J. Huuskonen & L. Heikkinen [Hakulinen, Lichenotheca Fennica exs. no. 1293] (BM! - holotypus [TLC: oxypannaric acid and trace of pannaric acid])".

Type: Finland, lääni Oulu, Paltamo, Melalahti, Viilonkallio, on dolomite rocks, 11 October 1959, A. J. Huuskonen & L. Heikkinen [Hakulinen, Lichenotheca Fennica exs. no. 1293] (BM! - holotypus [TLC: oxypannaric acid and trace of pannaric acid]).

Chemistry: 4-oxypannaric acid 2-methylester by TLC (Sohrabi & Orange 2006: 102).

Ecology: On mosses on soil (Sohrabi & Orange 2006: 102).

Note: There is a variety chrysodetoides (J. R. Laundon) Kukwa.
With the Chemistry: 4-oxypannaric acid 2-methyl ester (major), 4-oxypannaric acid (minor), porphyrilic acid (minor), atranorin (trace), pannaric acid (trace), pannaric acid 2-methyl ester (trace), pannaric acid 6-methyl ester (trace), 2 unknown derivatives of 4-oxy-pannaric acid (both minor) (Elix & Tønsberg 2004: 43).