Archaeopteryx is known as the earliest and most primitive bird.
Archaeopteryx is said to be considered a link between birds and reptiles, the first bird which changed from a land dweller to a bird.
It was seen in the Late Jurassic Period i.e. around 150–148 million years ago.
Had jaws with sharp teeth, three fingers along with claws, a long bony tail, feathers, and several various skeletal features.
It is referred as a transitional fossil between dinosaurs and birds since it displayed a number of features which were common to both birds and dinosaurs.
Final answer:Archaeopteryx is a missing link between reptiles and birds.