EVOLUTIONARY BIOLOGY OF PARASITIC PLATYHELMINTHS - THE ROLE OF MOLECULAR PHYLOGENETICS

As our appreciation of the diversity within the flatworms has grown, s o too has our curiosity about the ways in which these varied creatures are related to one another. In particular, the parasitic groups (trem atodes, cestodes and monogeneans) have been the focus of enquiry. Unti l recently, morphology, anatomy and life histories have provided the r aw data for building hypotheses on relationships. Now, ultrastructural evidence, and most recently, molecular data from nucleic acid sequenc es, have been brought to bear on the topic. Here, David Blair, Andres Campos, Michael Cummings and Juan Pedro Laclette discuss the ways in w hich molecular data, in particular, are helping us recognize the vario us lineages of flatworms.