In 2007, the oldest fossils assignable at that time to the liverworts were announced, Metzgeriothallus sharonae from the Givetian (Middle Devonian) of New York, United States.
En 2007, anunciouse o descubrimento do fósil máis antigo asignable a hepáticas, chamado Metzgeriothallus sharonae do Givetiano (Devoniano medio) de Nova York, Estados Unidos.