Sequencing success for different morphological groups of taxa included in this study. Specimens were grouped into three main morphological categories: 1 Buellia, Catillaria and other crustose saxicolous taxa 2 Endocarpon and other squamulose terricolous taxa 3 the foliose corticolous genus Parmotrema. In the graph, stalked columns show successful samples (sequence generated for the target species) in dark grey and unsuccessful samples (no sequence generated or generated sequences not from the target species) in light grey. The total number of samples (N) is indicated below each corresponding column.