Database of fungal genome size information has been launched in 2005: the Fungal Genome Size Database (http://www.zbi.ee/fungal-genomesize/). The database provides freely accessible genome size data assembled from literature. The taxonomy and the names of the used updated species follow Index Fungorum (http://www.indexfungorum.org). Genome size data are given as haploid (1C) values in megabases (Mb) and in picograms (pg).