brahaha good catch. heh yeah this painting is probably giving paleontological reconstructionists across the world stomach ulcers right now.
it's a personal thing - (i'm a cetacean nerd) the prehistoric beasties i'm concocting right now are a preliminary leadup to a kids' book, so i wanted to make the ichthyosaurs a bit friendlier looking. heh, they likely didn't hang out with their babies after they were born, either, but it makes the jurassic seas a little less eat-and-be-eaten for the kiddies.
and ya never know, for a while there ceratopsians didnt have cheeks and all their food fell out the sides of their mouths.