The third, updated electronic version of the world list of cetrarioid lichens ( http://esamba.bo.bg.ut.ee/checklist/cetrarioid/home.php) contains more than 570 names representing 149 accepted species. It is based on a FileMaker powered database, allowing users to view data in different sets and to perform searches. The list presents new information about the phylogenetic status of accepted taxa, and about the type materials for most of the names. A concise list of the cetrarioid lichens displayed below includes all the currently accepted 25 genera and 149 species which are now or have earlier been considered to be cetrarioid; taxa belonging to the monophyletic cetrarioid core group (17 genera and 101 species) are pointed out. A new combination Nephromopsis sikkimensis is proposed and some nomenclatural details discussed.