Reference

Klaus Groh, C. Elena Ponte-Lira, Maria Rosario Alonso, Miguel Ibanez (1994): Revision of the genus Canariella P. Hesse 1918. Alvaradoa n. subgen., with description of one new species from El Hierro (Gastropoda Pulmonata: Hygromiidae) – Archiv für Molluskenkunde – 123: 89 - 107.