“…When one turns to the Platyhelminthes, one finds a somewhat similar picture, although this phylum is far less homogeneous than the Nematoda, with such variant groups as the non-parasitic Turbellaria and the parasitic Trematoda and Cestoda. groups remain only partially resolved (Kodedova et al, 2000;Mackiewicz, 1981Mackiewicz, , 1982Mackiewicz, , 1994Mackiewicz, , 2003Olson et al, 2001Olson et al, , 2008Waeschenbach et al, 2007) Les caryotypes de trois planaires marines nord-americaines: contribution a la phylogenie et a la c l a s s i f i c a t i o n d u g r o u p e ( P l a t y h e l m i n t h e s , Tu r b e l l a r i a , Tricladida). Canadian Journal of Zoology,vol.…”