Triploblastic relationships were examined in the light of molecular and morphological evidence. Representatives for all triploblastic "phyla" (except Loricifera) were represented by both sources of ...

Recent molecular phylogenetic analysis has shown that the marine animals known as peanut worms are not a separate phylum, but are definitely part of the family of annelids, also known as segmented ...

The Annelida collection, including Echiura, Sipuncula and free-living nematode worms, contains a wealth of important and historic material, including the most comprehensive collection of Siboglinidae ...