Here I'll add just one new point, illustrated by the flatworms, Platyhelminthes.    From Wordnik.com.  [The Angry Evolutionist] Reference

The phylum Platyhelminthes contains both parasitic worms and the free living flatworms.    From Wordnik.com.  [Platyhelminthes] Reference

Digeneans, like most other Platyhelminthes, have no special provisions for circulation but do have a lymphatic system.    From Wordnik.com.  [Platyhelminthes] Reference

All of these groups of Platyhelminthes are parasitic and have adapted their life cycles and body structures to help them better utilize their hosts.    From Wordnik.com.  [Platyhelminthes] Reference

In fact, there are so many species of beetles that there are more species of beetles than the total number of species currently living in the Phyla Echinodermata, Mollusca, Annelida, Platyhelminthes, Cnidaria, and Porifera combined!.    From Wordnik.com.  [Species richness] Reference

The planarian belong to the phylum Platyhelminthes.    From Wordnik.com.  [CreationWiki - Recent changes [en]] Reference

Article outlining the biology of the Platyhelminthes and Nemertea.    From Wordnik.com.  [Fishing and Flyfishing with Rangerrob - RSS Feed Available] Reference

The flatworms belong to the phylum Platyhelminthes, which could be simply translated from the Greek as "Flat Worms".    From Wordnik.com.  [Wanderin' Weeta (With Waterfowl and Weeds)] Reference

Traditionally, Acoela were seen as an early branching clade within the Platyhelminthes, but became recently positioned at the base of the Bilateria.    From Wordnik.com.  [BioMed Central - Latest articles] Reference

Tissue plasticity and a substantial regeneration capacity based on stem cells are the hallmark of several invertebrate groups such as sponges, cnidarians and Platyhelminthes.    From Wordnik.com.  [BioMed Central - Latest articles] Reference

Juveniles are eaten by flatworms (Platyhelminthes), leeches (Hirudidae), and crayfish as well as an array of freshwater fish including carp (Cyprinidae), sturgeon (Acipenseridae), catfish (Ictaluridae), and sunfish (Centrarchidae).    From Wordnik.com.  [Freshwater mussels in North America - factors affecting their endangerment and extinction] Reference

A duplication of an ancestral globin gene occurred before the divergence of the Platyhelminthes and the Nematoda and one of the duplicated genes radiated further in the nematode phylum before the split of the Spirurina and Rhabditina and was followed by further radiation in the lineage leading to Caenorhabditis.    From Wordnik.com.  [BioMed Central - Latest articles] Reference

The Platyhelminthes, to a worm, are "already in an advanced state of evolution, the very first time they appear.    From Wordnik.com.  [The Angry Evolutionist] Reference

Platyhelminthes.    From Wordnik.com.  [Platyhelminthes] Reference

Platyhelminthes - Encyclopedia of Earth.    From Wordnik.com.  [Platyhelminthes] Reference

1. Platyhelminthes land planarians.    From Wordnik.com.  [Archive 2006-05-01] Reference

"Platyhelminthes.".    From Wordnik.com.  [Platyhelminthes] Reference

1.1 Parasitic - Parasitic Platyhelminthes.    From Wordnik.com.  [Platyhelminthes] Reference

Tim says he has so far eaten from the following animal phyla: Porifera, Cnidaria, Ctenophora, Platyhelminthes, Nematoda, Nematomorpha, Rotifera, Tardigrada, Sipunculida, Bryozoa, Ectoprocta, Brachiopoda, Mollusca, Annelida, Arthropoda, Chordata and Echinodermata.    From Wordnik.com.  [So many phyla so little time to eat them all] Reference