Aneura bipinnata (≡ Riccardia bipinnata, described from Jamaica as Jungermannia bipinnata (“2-pinnata“) by Olof Swartz (1788, 1806), is one of the oldest names in Aneuraceae and one of the poorest known. Swartz' original description and the brief diagnosis in Synopsis Hepaticarum (Gottsche et al. 1846) are the only available descriptions for the species. Stephani (1899) was unable to locate mat...