Their phylogenetic position as well as a taxonomic rank widely varies in zoological literature from the order of flatworms. Historically they were treated as an order of turbellarian flatworms. The acoelomorpha ehlers, 1984, comprising acoela and nemertodermatida, were traditionally considered monophyletic and were.
Acoela represent one of the most spectacular taxa in animal kingdom.
Historically they were treated as an order of turbellarian flatworms. Acoela(acoels) phylum platyhelminthesclass acoelanumber of families 20thumbnail description tiny marine wormlike metazoans (acoela)— the first case of longitudinal fission in plathelminthes. Acoela represent one of the most spectacular taxa in animal kingdom. Acoela is an order of animals treated either as a group of flatworms or as one of the two classes of the phylum acoelomorpha, containing the majority of that phylum's species.