This Zootaxa journal article features an updated list of tardigrade taxa. This list is supplemented by a series of bibliographic references inherent in the synonymies and/or the amended diagnosis of the taxa occurred after 1983, and a list of the main characters used in the diagnosis of the species. These lists are not only aimed at the specialists studying this group, but also researchers interested in biodiversity and those who refer to this animal group. A subscription to Zootaxa may be required to view this article.