Tardigrades, microscopic animals, are less cosmopolitan and more diverse than has been thought (IMAGE)
Caption
A tardigrade belonging to the genus Echiniscus, photographed by scanning electron microscope. Differences between one or two physiological traits were long thought sufficient to distinguish between species, giving rise to false cosmopolitan species, which have now been excluded from the list in the Neotropical and Andean regions
Credit
André Garraffoni
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