Catalog of Liverworts (Marchantiophyta) and Hornworts (Anthocerotophyta) from Central America and Cocos Island

This catalog represents the first enumeration of all species of liverworts (Marchantiophyta) and hornworts (Anthocerotophyta) for Central America, including Belize, Costa Rica, El Salvador, Guatemala, Honduras, Nicaragua, Panama, and Cocos Island of Costa Rica. It includes 846 liverwort species in 126 genera as well as 19 hornwort species in 7 genera and 4 families. The catalog is based on more than 1,500 publications and from more than 900 herbarium specimens examined by the authors. There are 184 new country or region records reported: Belize (17), Costa Rica (10), El Salvador (22), Guatemala (7), Honduras (51), Nicaragua (45), Panama (7), and Cocos Island of Costa Rica (25). Accepted names are listed alphabetically, and auxiliary information including basionyms and heterotypic synonyms is presented for each taxon where appropriate. Broader geographical distribution is also provided for each taxon for context. There are 42 reported taxa (species and infraspecific taxa) that are considered doubtful and 38 reported taxa that are excluded. Sixteen taxa are reported as new to Central America. Harpalejeunea exocellata Herzog is synonymized under Harpalejeunea tridens (Besch. et Spruce) Steph., and Leucolejeunea nana S.Winkl. is placed under the synonymy of Cheilolejeunea conchifolia (A.Evans) W.Ye et R.L.Zhu. The taxonomic, geographic, and auxiliary information included here will have broad utility beyond liverwort and hornwort systematics, extending to the study and analyses of species richness, conservation, and systematic research at both country and regional levels.