The Hettangian Age (201–199 Ma) is the first age in the Early Jurassic Epoch of the Jurassic Period of the Mesozoic Era. It occurs after the Rhaetian Age of the Triassic Period and before the Sinemurian Age.
201.3±0.2–199.3±0.3 Ma
Bennettitales: Otozamites mimetes and Otozamites tenuatus
Conifers: Brachyphyllum crucis
Seed ferns: Sagenopteris pualensis