Arthrotardigrada

Arthrotardigrada are an order of tardigrades, first described by Ernst Marcus in 1927.

Batillipes is genus of tardigrades, the only genus in the family Batillipedidae. It was first described by Ferdinand Richters in 1909.

species of waterbears

Archechiniscus is the only genus of tardigrades in the family Archechiniscidae. It was first described by Erich Schulz in 1953.

species of waterbear (tardigrade)

Actinarctus is a genus of tardigrades in the family Tanarctidae. The genus was named and described by Erich Schulz in 1935.

Tanarctus is a genus of tardigrades in the family Tanarctidae, named and described by Jeanne Renaud-Debyser in 1959.

Neostygarctus is a genus of tardigrades. It is the only genus in the family Neostygarctidae. It was named and described by Grimaldi de Zio, D'Addabbo Gallo and Morone De Lucia in 1982.