Fig. S1 Relationship between success in obtaining nuclear ribosomal internal transcribed spacer DNA sequence data and the age of specimens.

Fig. S2 Results of the blastclust analysis, showing the number of clusters or taxonomic units – a proxy for species – in each category (i.e. DNA sequence pool) and their overlaps based on ≥ 97% DNA sequence similarity.

Table S1 Specimens which yielded internal transcribed spacer DNA sequences used in the analysis

Table S2 Summary of the 21 (≥ 97%) blast matches which were to the wrong species

Table S3 Output from the BLASTclust analysis showing only the herbarium sequences

Methods S1 blastclust analysis.

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