Illustrated descriptions of Macrobiotus danilovi sp. n., Macrobiotus tenuiformis sp. n. from Tien Shan (Kirghizia) and Macrobiotus voronkovi sp. n. from Spitsbergen are given. These new species belong to the tenuis-group of the genus Macrobiotus. Members of the tenius-group have claws with a particularly long and thin common tract with a prominent frontal appendage at the base. Macrobiotus danilovi and M. tenuiformis differ from all known species of this group in the structure of their buccal armature. Macrobiotus voronkovi differs from all known species of the tenuis-group in its combination of features in adult animals and in the egg shell.
Tardigrada, Macrobiotus danilovi sp. n., Macrobiotus tenuiformis sp. n., Macrobiotus voronkovi sp. n.