Comprehensive checklists of tardigrade species are listed below. Guidetti and Bertolani (2005) is an early checklist which was expanded by Degma and Guidetti (2007) and later by Degma, Bertolani and Guidetti (2014).
- Tardigrade taxonomy: An updated check list of the taxa and a list of characters for their identification (Guidetti and Bertolani, 2005 – abstract only): Tardigrade Taxonomy
- Notes to the current checklist of Tardigrada (Degma and Guidetti, 2007 – abstract only): Notes to the Current Checklist of Tardigrada
- Actual Checklist of Tardigrada Species (2009-2014, Vers. 24: 15-01-2015 (Degma, Bertolani and Guidetti, 2014): Actual checklist of Tardigrada (updates available at: http://www.tardigrada.modena.unimo.it/)
Other Lists of Tardigrade Species:
- List of Tardigrada (Wikipedia, based on the Actual Checklist of Tardigrtada Species): http://species.wikimedia.org/wiki/List_of_Tardigrada