Ctenophores (Comb-jellies)

The Coelenterata are an obsolete phylum which encompassed sponges and Cnidarians (with ctenophores within Cnidaria).  The Ctenophora (comb jellies) are divided into two classes depending on presence of tentacles with the vast majority of species in Tentaculata.  This Wall Chart illustrates the body forms of some Ctenophores, note only two tentacles (when present), the rows and/or clumps of cilia which beat to produce movement (produce rainbow effect in doing so), and the presence of a through gut.  Interesting to note is the elongate body plan (fig. 4) of a repersentative of the family Cestidae which moves via undulations throughout it’s length.