Background In the classification of living organisms on Earth, the Animalia kingdom or Metazoa comprises all extant multicellular heterotrophic eukaryotes. It is divided into a number of distinct phyla, differing mainly by the level of&hellip

Background In the classification of living organisms on Earth, the Animalia kingdom or Metazoa comprises all extant multicellular heterotrophic eukaryotes. It is divided into a number of distinct phyla, differing mainly by the level of&hellip