The ultrastructural organization of Acoela and their phylogenetic relationships

  title={The ultrastructural organization of Acoela and their phylogenetic relationships},
  author={Ya. I. Zabotin},
Acoela represent one of the most spectacular taxa in animal kingdom. Their phylogenetic position as well as a taxonomic rank widely varies in zoological literature from the order of flatworms to the separate phylum within the deuterostomes or the sister taxon of all other bilaterians. One of the reasons of the absence of consensus among morphologists and molecular biologists is the insufficient amount of fine structural data on Acoela. In the present work the new ultrastructural features of… 

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