A minute animal of the phylum Tardigrada; a water bear.
- The second clade includes arthropods and other molting animals: tardigrades, onychophorans, nematodes, nematomorphans, kinorhynchs, and priapulans.
- The branching pattern between nematodes, onychophorans, and tardigrades relative to Euarthropoda is not well resolved (low Bayesian support values).
- Cryptobiosis is widespread in the animal and plant kingdoms, and occurs for example in tardigrades, nematodes, cysts of crustaceans, yeasts, bacteria, fungi, mosses, pollens, seeds, and even in entire higher plants.
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