Sure, they are similar. It would be very strange, however, to argue that they are fragmentations of Lisp in the sense that Ocaml and SML are fragmentation of ML

Sure, they are similar. It would be very strange, however, to argue that they are fragmentations of Lisp in the sense that Ocaml and SML are fragmentation of ML. They may share ideas since they are in the same semantic family (dynamically typed) but that's about the extent of it.