I encourage anyone who is honestly concerned about the “missing links” in the fossil record to review the excellent book provided at macroevolution.net. Eugene M. McCarthy, Ph.D. Genetics provides a very persuasive argument that hybridization between “species” is the source of the jumps in the fossil record.
The missing links I am referring to are with regard to the fact that no animal has gradually changed from one form to the next. In every case, there are sudden jumps in the record, with no intervening types. I found Dr. McCarthy’s carefully written discourse extremely satisfying, answering many of the questions I outlined in prior blog posts. For all those who have argued with me regarding those issues, I refer you to the book available in its entirety at Macroevolution.net.