| It is conceivable that a twisting of the body organization would have turned a protostome into a deuterostome. |
| Even if it is not a protostome, it is widely accepted as a bilaterian. |
| The larva and the pattern of its early development indicate that the entoprocts may be linked remotely with the annelids and other protostome phyla, but precise evolutionary relationships with other phyla are not yet clear. |
| Eyes appear in the bilaterally symmetrical animals in the protostome invertebrate branch, including the Phylum Arthropoda, Annelida, and Mollusca. |
| Evidence from 18S ribosomal DNA that the Lophophorates are protostome animals. |
