Relating to or belonging to the phylum Gastrotricha or characteristic of gastrotrichs.
From 'gastrotricha' (phylum of microscopic animals) + '-an' (adjective-forming suffix). The suffix '-an' transforms the phylum name into an adjective describing membership or characteristics.
Gastrotrichan anatomy is bizarre by human standards—they have no blood vessels, no circulatory system, and their muscles connect directly to their outer layer, making them perfectly adapted to life at microscopic scales!
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