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Amanda Louise Reid, PhD

Phylum Tardigrada Number of families 20

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Microscopic, aquatic, multicellular, segmental animals with four pairs of legs

Photo: Colored scanning electron micrograph of a water bear (Echiniscus testudo) in its crypto-biotic tun, or barrel, state. (Photo by Andrew Syred/Science Photo Library/Photo Researchers, Inc. Reproduced by permission.)

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