A dichotomous key to the genera of the Marine Heterotardigrades (Tardigrada) Author Fontoura, Paulo Author Bartels, Paul J. Author Jørgensen, Aslak Author Kristensen, Reinhardt Møbjerg Author Hansen, Jesper Guldberg text Zootaxa 2017 4294 1 1 45 journal article 32663 10.11646/zootaxa.4294.1.1 4e098c30-d7f2-49d2-9d71-4a2815d76e06 1175-5326 831540 F7EC0547-6984-4C85-B1BF-010C049D0F2D 2. ECHINISCOIDEA Richters, 1926 Heterotardigrades with non digitate legs. Claws always borne on papillae and not directly implanted on the legs. Median cirrus absent48.