Integrative description of Hypsibius repentinus sp. nov. (Eutardigrada: Hypsibiidae) from Sweden

D.V. Tumanov & G.S. Avdeeva

Abstract. A new species of tardigrade from the genus Hypsibius Ehrenberg, 1848 is described from the bottom sediments of a small lake in the central part of Scandinavian Peninsula (Sweden), using an integrative approach, i.e. morphological techniques (light and scanning electron microscopy) combined with a molecular analysis (18S rRNA, 28S rRNA, ITS-2 and COI markers). Hypsibius repentinus sp. nov. belongs to the Hypsibius dujardini species–group and differs from the most similar species of this group in having a second macroplacoid with a definite constriction and in some other morphometric characters. Morphological diagnosis for the Hypsibius dujardini species–group is proposed, and its composition is discussed.
Key words: freshwater tardigrades, Europe, Tardigrada, Hypsibioidea, Hypsibiidae, Hypsibius, Hypsibius dujardini species–group, new species

Zoosystematica Rossica, 2021, 30(1): 101-115  ▪  Published online 16 June 2021


https://doi.org/10.31610/zsr/2021.30.1.101  ▪  Open full article  

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