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| Heterotardigrada | |
|---|---|
_Figure_2.jpg)
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| Echiniscus succineus under PCM (left) and SEM (right) | |
Scientific classification 
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| Domain: | Eukaryota |
| Kingdom: | Animalia |
| Phylum: | Tardigrada |
| Class: | Heterotardigrada Marcus, 1927 |
| Families | |
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Order Arthrotardigrada | |
Heterotardigrades (Heterotardigrada) is a class that 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.[1]
- ^ Zhang, Z.-Q. (2011). "Animal biodiversity: An introduction to higher-level classification and taxonomic richness" (PDF). Zootaxa. 3148: 7–12. doi:10.11646/zootaxa.3148.1.3.