Taxonomic Notes: This species is morphologically different from all other Ramalina species in Macaronesia (Aptroot & Schumm 2008) and elsewhere in the world. See Aptroot & Schumm (2008) for a key to distinguishthis species from others.
This is a Macaronesian endemic, only known worldwide from Porto Santo Island. This species is not currently protected and is at high risk of extinction. There are under 100 individuals, which meets the criterion D threshold for Endangered of under 250 mature individuals. Although this species has arestricted distribution and occurs in a single subpopulation, there is no information on continuing declines and therefore, this species cannot be assessed under criteria B or C. Therefore, this species isassessed as Endangered.
Assessor/s: Aptroot, A.; Reviewer/s: Scheidegger, C.; Contributor(s): Perez-Ortega, S, Spribille, T. & Dahlberg, A.
Bibliography:
Aptroot, A. & Schumm., F. (2008) Key to Ramalina species known from Atlantic islands, with two newspecies from the Azores. Sauteria 15:21-57.
IUCN (2015) The IUCN Red List of Threatened Species. Version 2015-4. Available at: www.iucnredlist.org. (Accessed: 19 November 2015).
Krog, H. (1990) New Ramalina species from Porto Santo, Madeira. Lichenologist22(3): 241-247.
Find out more about the IUCN Red List Categories and Criteriahere.