Oogenesis in the tardigrade Hypsibius exemplaris Gąsiorek, Stec, Morek & Michalczyk, 2018 (Eutardigrada, Hypsibiidae).

Tardigrades are small, globally widespred invertebrates that need at least a thin layer of water to be active. There are gonochoric, hermaphroditic, and parthenogenetic species among them. The main aim of this study was to analyze the structure of the ovary, the structure of female germ cell clusters, and the course of oogenesis in the parthenogenetic species Hypsibius exemplaris, which in 2007 was recognized as a model organism.