The Blue Lias rock is host to a multitude of remains from the early Jurassic, a time from which good fossil records are rare. Many of the remains are well preserved, with complete specimens of several important species. Many of the earliest discoveries of dinosaur and other prehistoric reptile remains were made in the area surrounding Lyme Regis, notably those discovered by Mary Anning (1799–1847). Significant finds include "Ichthyosaur", "Plesiosaur", "Dimorphodon", "Scelidosaurus", one of the first armoured (Thyreophora) dinosaurs. The town now holds an annual Mary Anning Day and Lyme Regis Fossil Festival. A fossil of the world's largest moth was discovered in 1966 at Lyme Regis.