Heterotardigrada

The class Heterotardigrada includes tardigrades (water bears) that have cephalic appendages and legs with four separate but similar digits or claws on each. 444 species have been described.

Heterotardigrada
Echiniscus succineus under PCM (left) and SEM (right)
Scientific classification
Domain: Eukaryota
Kingdom: Animalia
Phylum: Tardigrada
Class: Heterotardigrada
Marcus, 1927
Families

Order Arthrotardigrada
  Archechiniscidae
  Batillipedidae
  Coronarctidae
  Halechiniscidae
  Neoarctidae
  Neostygarctidae
  Renaudarctidae
  Stygarctidae
  Styraconyxidae
  Tanarctidae
Order Echiniscoidea
  Carphaniidae
  Echiniscidae
  Echiniscoididae
  Oreellidae

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