Arthrotardigrada

Heterotardigrada
Scientific classification
Kingdom:	Animalia
Phylum:	Tardigrada
Class:	Heterotardigrada
Order:	Arthrotardigrada
Families
Archechiniscidae   Batillipedidae   Coronarctidae   Halechiniscidae   Renaudarctidae   Stygarctidae

Arthrotardigrada are an order of tardigrades.^[1][2]

References

1. Justin Gerlach (2011). Crustacea, Platyhelminthes, Nematoda, Nemertea, Annelida, Rotifera and Tardigrada of the Seychelles Islands. Siri Scientific Press. pp. 78–. ISBN 978-0-9558636-9-1. The class Heterotardigrada includes two orders: Arthrotardigrada and Echiniscoidea. The Arthrotardigrada includes only marine species, that very often have also a medial cirrus in the head; legs may be digitate or not. In non-digitate legs ...
2. Jørgensen, Aslak; Faurby, Søren; Hansen, Jesper G.; Møbjerg, Nadja; Kristensen, Reinhardt M. (2010-03-01). "Molecular phylogeny of Arthrotardigrada (Tardigrada)". Molecular Phylogenetics and Evolution. 54 (3): 1006–1015. doi:10.1016/j.ympev.2009.10.006.