A newly-discovered type of crab from the Cretaceous period looks like it had the eyes of a larva, the mouth of a shrimp, and the carapace of a lobster
Source:
https://www.newscientist.com/article/2200724-rule-breaking-crab-fossils-have-weird-shrimp-and-lobster-features/?utm_campaign=RSS%7CNSNS&utm_source=NSNS&utm_medium=RSS&utm_content=home