Heterotardigrada

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

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

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