Ceratopsian (horned) dinosaurs appear to develop their horns as a sign of maturity. Some young specimens may have been wrongly classified as evolutionary links. Check this out:
“Liaosaurus has features that spoil the idea of a smooth evolutionary progression. Rather, some structural similarities between different ceratopsians are now regarded as homoplasies, i.e. independently arisen and not the result of evolution from a common ancestor. This is consistent with separate creation. The homoplasies have also caused the researchers to reverse the previous order of evolution (phylogeny) in one case, showing how uncertain evolutionary theories are…
…Anyway, as shown in Dinosaurs: Phylogenetic Chart, gaps, not progressions, dominate.”
Read more about this here: https://creation.com/liaosaurus-a-missing-link-of-the-horned-dinos
