Lichens of Belgium, Luxembourg and northern France
|Arthonia malicola B. de Lesd.|
Corticolous, on bark of young branches of Malus.
Belgium: - .
Luxembourg: - .
France: Brab.: RRR (<1910, type locality).
Redinger (1937) examined the holotype and found that it represents a species of Arthonia with submuriform ascospores. The holotype has unfortunately been destroyed. Sundin (1999) studied several isotypes that represent Naetrocymbe punctiformis.
Lit.: Bouly de Lesdain (1910: 229), Redinger (1937: 55-56), Sundin (1999: 65).