4 Pairs of Legs


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    Key to Aquatic Macroinvertebrates in Utah - 4 Pairs of Legs

    Aquatic organisms with 4 pairs of legs belong to the class Arachnida and the order Acariformes. 


    Hydrachnidae (water mite)

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    Description: Hydrachnidae are very small and brightly colored. Many are red, but can be green, yellow, and blue. These organisms also have pedipalps that can appear to be a 5th pair of legs. Less than 2mm.

    HabitatFound in all types of freshwater habitats including rivers, streams, lakes, ponds, wetlands, and springs. 

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