Microhypsibiidae

Microhypsibiidae is a family of tardigrades in the class Eutardigrada.
It contains the following species in two genera:Fractonotus

* Fractonotus caelatus Microhypsibius
* Microhypsibius bertolanii Kristensen, 1982
* Microhypsibius japonicus Ito, 1991
* Microhypsibius minimus Kristensen, 1982
* Microhypsibius truncatus Thulin, 1928