Among the paleontological evidence for evolution, the discovery and study of fossil forms and the compilation of phylogenetic series

Among the paleontological evidence for evolution, the discovery and study of fossil forms and the compilation of phylogenetic series play an important role. Explain the nature and meaning of these methods and give one example

1) transitional forms have signs of an ancient initial and a new group of organisms, they make it possible to establish the course of the evolutionary process (the origin of a new group)
2) phylogenetic series is a sequence of fossil forms that allows you to establish the evolution of a particular genus or species
3) examples: a transitional form-animal-toothed reptile (ancient cross-finned fish, Archeopteryx); horse phylogenetic series

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