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 | |
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.