Triploblastic Relationships with Emphasis on the Acoelomates and the Position of Gnathostomulida, Cycliophora, Plathelminthes, and Chaetognatha: A Combined Approach of 18S rDNA Sequences and Morphology
Gonzalo Giribet, Daniel L. Distel, Martin F. Polz, et al.·2000·Systematic Biology