Chapter 14, Problem 18RQ

Summary Introduction

To determine: The characters that unite the rotifers and acanthocephalans as members of clade Syndermata.

Introduction: The three phyla- Phoronida, Ectoprocta, and Brachiopoda- possess a crown of ciliated tentacles, called a lophophore that they use in food capture and respiration. Brachiopods were abundant in the Paleozoic era but began to decline thereafter.