The first phylum within Spiralia that we will investigate is Platyhelminthes. These are the so-called flatworms. What are their characteristics? What are the clades within this phylum? Let's set ourselves up for a thorough...

With the basics regarding phylum Platyhelminthes covered, it's time to start digging into the clades within. Free-living flatworms were originally classified within the class Turbellaria. But more recently the clades needed to be...