Stygarctidae

The Stygarctidae are a family of tardigrades. The family was first described by Schulz in 1951. The genus Neoarctus was first placed in the family Stygarctidae, but it was moved to a separate family, Neoarctidae, in 1998.

Subfamilies and genera
They are divided into the following subfamilies and genera:
 * Megastygarctidinae Bello & de Zio Grimaldi, 1998 :
 * Megastygarctides McKirdy, Schmidt & McGinty-Bayly, 1976
 * Stygarctinae Schulz, 1951 :
 * Faroestygarctus Hansen, Kristensen & Jørgensen, 2012
 * Mesostygarctus Renaud-Mornant, 1979
 * Parastygarctus Renaud-Debyser, 1965
 * Prostygarctus Rubal, Veiga, Fontoura & Sousa-Pinto, 2013
 * Pseudostygarctus McKirdy, Schmidt & McGinty-Bayly, 1976
 * Stygarctus Schulz, 1951