Pseudotachidiidae is a family of marine benthic copepods in the order Harpacticoida. Members of this family are small, typically ranging from about 0.2 to 1.5 mm in length, and are adapted to living in marine sediments, including both shallow coastal and deep-sea environments. Pseudotachidiidae are primarily deposit feeders in sedimentary habitats and form an important component of meiofaunal communities, particularly in deep-sea settings where they can be among the dominant harpacticoid families.

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