Roque Chico de Salmor Giant Lizard
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| Gallotia simonyi simonyi (Steindachner, 1889) |
The Roque Chico de Salmor Giant Lizard (Gallotia simonyi simonyi) was the nominate subspecies of the lacertid (wall lizard) Gallotia simonyi. It was once present on a small islet near El Hierro in the Canary Islands.
Gallotia simonyi simonyi was only known from the Roque Chico de Salmor off northwestern Valverde municipality, El Hierro. It disappeared around the 1930s through unsustainable collecting of animals for scientific institutions and commercial interests, as well as predation by feral cats and possibly Herring Gulls (Diaz & Bischoff 1994, Miras & Pérez-Mellado 2005). Following this population's disappearance, the species was believed to be entirely extinct until Gallotia simonyi machadoi was discovered on El Hierro itself in 1974 (Böhme & Bings 1975).
The newly-discovered population is also most rare and might go extinct due to stochastic events. Presently however it seems to hold its own - not the least due to reintroduction to the Roque Chico de Salmor which is now a protected area (Miras & Pérez-Mellado 2005).
[edit] See also
[edit] References
- Blanco, Juan Carlos & González, José Luis (eds.) (1992): Libro rojo de los vertebrados de España. ICONA, Madrid.
- Böhme, W. & Bings, Werner (1975): Zur Frage des Überlebens von Lacerta s. simonyi Steindachner. Salamandra 11(1): 39-46. [Article in German]
- Diaz, Carlos Naeslund & Bischoff, Wolfgang (1994): Studien am Roque Chico de Salmor bei El Hierro (Kanaren): 1. Mögliche Ursachen für das Aussterben von Gallotia simonyi, 2. Die Artzugehörigkeit seiner Geckos (Tarentola). Salamandra 30(4): 246-253. [Article in German] HTML abstract
- European Environment Agency (2006): European Nature Information System (EUNIS): Species Factsheet: Gallotia simonyi simonyi. Downloaded on 24 Feb 2007.
- Maas, Peter H.J. (2006): The Extinction Website: Extinctions in Europe. Downloaded on 18 May 2006.
- Miras, J.A.M. & Pérez-Mellado, V. (2005). Gallotia simonyi. 2006 IUCN Red List of Threatened Species. IUCN 2006. Retrieved on 11 May 2006. Database entry includes a range map and justification for why this species is critically endangered
[edit] Footnotes
- ^ Blanco & González (1992)
[edit] External links
- lacerta.de: Gallotia simonyi machadoi image gallery. Contains several good photos of habitat on Roque Chico de Salmor. Retrieved 2007-FEB-25.
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