Antbase now provides access to all the ant species of the world, one of the ecologically most important groups of animals worldwide, including information on distribution, taxonomy, and ant sample datasets. Antbase is a collaborative effort between scientists from around the world, aiming at providing the best possible access to the wealth of information on ants, to fulfill the conservation needs of the International Union for the Study of Social Insects (IUSSI), and the Species Survival Commission of the World Conservation Union (IUCN). Antbase, together with the Hymenoptera On-line Database, is the data provider for ants to the Integrated Taxonomic Information System, ITIS.Antbase is a collaborative effort between scientists from around the world, aiming at providing the best possible access to the wealth of information on ants, to fulfill the conservation needs of the International Union for the Study of Social Insects (IUSSI), and the Species Survival Commission of the World Conservation Union (IUCN). Antbase, together with the Hymenoptera On-line Database, is the data provider for ants to the Integrated Taxonomic Information System, ITIS.