ArthrotardigradaArthrotardigrada are an order of tardigrades, first described by Ernst Marcus in 1927.In 2018, a report integrating multiple morphological and molecular studies concluded that the Arthrotardigrada appear to be paraphyletic.FamiliesArthrotardigrada consists of the following families: Anisonychidae Archechiniscidae Batillipedidae Coronarctidae Halechiniscidae Neoarctidae Neostygarctidae Renaudarctidae Stygarctidae Styraconyxidae Tanarctidae