Roque Chico de Salmor giant lizard Temporal range: Late Pleistocene–Recent | |
---|---|
Scientific classification | |
Kingdom: | Animalia |
Phylum: | Chordata |
Class: | Reptilia |
Order: | Squamata |
Family: | Lacertidae |
Genus: | Gallotia |
Species: | |
Subspecies: | †G. s. simonyi |
Trinomial name | |
†Gallotia simonyi simonyi (Steindachner, 1889) |
The Roque Chico de Salmor giant lizard (Gallotia simonyi simonyi) is the extinct nominate subspecies of Simony's giant lizard (Gallotia simonyi), which was endemic to the small islet Roque Chico de Salmor (lit. "Salmor Small Rock") northwest of El Hierro, the westernmost of the Canary Islands.
Preserved male specimens measure between 223 and 236 mm long, excluding the tail, and females between 174 and 197 mm. Compared to the extant subspecies from the mainland ( G. s. machadoi ), the subspecies from Roque Chico de Salmor was larger and more robust, with the top of the head more triangular and less oval, more depressed head, and on average, more dorsal scales, fewer temporal scales, more femoral pores, and more scales on the sixth ring of the tail. Mitochondrial DNA studies suggest that the two subspecies separated recently, as a result of rising sea levels at the end of the Pleistocene. [2]
Roque Chico de Salmor is a small islet situated 830 meters to the northwest of El Hierro and 340 meters from the larger Roque Grande de Salmor. [2] Its extension is less than one hectare and is surrounded by tall cliffs. Vegetation is sparse but it is home to breeding colonies of seabirds. [1] Plants present include Astydamia latifoliae , Mesembrianthemum , Chenopodium , Chenoloides tomentosa , Beta , Silene and Rubia fruticosa . [2]
Despite being hunted by the Guanches, who also started clearing the island's forests and introduced exotic predators like dogs and possibly cats, giant lizards were still common in areas of El Hierro when Europeans arrived at the beginning of the 15th century. They severely declined with colonization, however, and by the 18th century were forgotten by the inhabitants of the island.
In 1799, José de Viera y Clavijo wrote in his Diccionario de Historia Natural de las Islas Canarias that rumors existed of a small islet near El Hierro that was inhabited by lizards so large that they could bend iron bars with their tails; he presumed these animals to be caimans. Following the publication of Viera y Clavijo's book in 1866, Franz Steindachner of the Naturhistorisches Museum of Vienna requested his colleague Oskar Simony to investigate the matter during a scheduled trip to the Canary Islands. On 28 August 1889, Simony arrived in El Hierro and collected four lizards in Roque Chico de Salmor with the help of grocer Eloy Díaz Casañas. Steindachner used three of these lizards to describe a new species, Lacerta simonyi. [1]
News of the discovery instantly caught the attention of naturalists, adventurers, and collectionists, who traveled to Roque Chico de Salmor to catch their own specimens. [1] The most damaging was wildlife trader Thomas Castle (born Tomás Ximénez del Castillo in Puerto de la Cruz) who, after convincing Díaz Casañas to gift him the fourth lizard collected with Simony and selling it for a high price, returned to capture 21 lizards in 1896 and 27 more in 1908, selling them in London and Hamburg. This trade spurred Díaz Casañas, his son, nephew, and local fishermen to capture more lizards for sale or exhibition. In 1931, English teacher Hugh B. Scott and local journalist José Padrón Machín collected two lizards in Roque Chico de Salmor, but they were already so rare that they spent the first three days without seeing one. No more lizards were seen after this date, and a local legend arised that a British or German trader had captured twenty lizards and poisoned the rest to keep the exclusivity of their sale. [1] Ten specimens are preserved [2] in the Naturhistorisches Museum of Vienna, British Museum of Natural History, Santa Cruz de la Palma, and Santa Cruz de Tenerife. [1]
The species Gallotia simonyi, then considered a monotypic taxon, was believed extinct until the subspecies G. s. machadoi was discovered in the Crag of Tibataje in 1975. [1] In 1999, 36 members of this subspecies were introduced successfully to Roque Chico de Salmor, exhibiting low mortality and signs of reproduction. [3]
The Canary Islands, also known informally as the Canaries, are a Spanish autonomous community and archipelago in Macaronesia in the Atlantic Ocean. At their closest point to the African mainland, they are 100 kilometres west of Morocco. They are the southernmost of the autonomous communities of Spain. The islands have a population of 2.2 million people and are the most populous special territory of the European Union.
El Hierro, nicknamed Isla del Meridiano, is the second-smallest and farthest-south and -west of the Canary Islands, in the Atlantic Ocean off the coast of Africa, with a population of 10,968 (2019). Its capital is Valverde. At 268.51 square kilometres (103.67 sq mi), it is the second-smallest of the eight main islands of the Canaries.
The genus Gallotia are the lacertids of the Canary Islands. This genus consists of a group that has been evolving there ever since the first islands emerged from the sea over 20 million years ago. The endemic species and subspecies of this group have a number of characteristics that make them quite special within their family (Lacertidae); their only close relatives are the sandrunner lizards (Psammodromus) of the western Mediterranean region. Gallotia are characteristic for eating significant quantities of plants, and several lineages are often presented as classic examples for insular gigantism. However, a find of an even larger Gallotia species from the early Miocene of mainland Europe casts doubt on this assumption. Instead the ancestor of all modern Gallotia species of the Canary islands was probably already very large but carnivorous.
The La Gomera giant lizard is a lacertid species that can be found on the island of La Gomera, one of the Canary Islands.
The El Hierro giant lizard is the only extant, critically endangered subspecies of Simony's giant lizard. It is endemic to El Hierro, the westernmost of the Canary Islands, where it is an official symbol.
Acanthodactylus erythrurus, commonly known as the spiny-footed lizard, is a species of lizard in the family Lacertidae. The species is endemic to northwestern Africa and the Iberian Peninsula. It is considered to be the fastest member of the family Lacertidae. Its common name refers to the spines that are arranged like a comb on the toes of its hind legs.
The ocellated lizard or jewelled lizard is a species of lizard in the family Lacertidae. The species is endemic to southwestern Europe.
The La Palma giant lizard is a large wall lizard endemic to the island of La Palma in the Canary Islands, currently extinct or critically endangered.
Simony's giant lizard is a large species of wall lizard endemic to the island of El Hierro and nearby islet Roque Chico de Salmor in the Canary Islands.
The Tenerife speckled lizard is a recently discovered lacertid endemic to Tenerife in the Canary Islands. It is the smallest member of the clade containing the western islands' giant species.
Boettger's lizard is a species of wall lizard in the family Lacertidae. The species is endemic to the Canary Islands. There are two recognized subspecies.
Gallotia galloti, also known commonly as Gallot's lizard, the Tenerife lizard, and the Western Canaries lizard, is a species of wall lizard in the genus Gallotia. The species is native to the Canary Islands of Tenerife and La Palma. Unlike most larger species of its genus, G. galloti is a commonly found animal. There are four recognized subspecies.
Aurora de Albornoz was born in Luarca, Asturias, Spain. As a youth, she lived in Luarca with her parents, sister, and extended family, throughout the Spanish Civil War from 1936 to 1939— an event that inspired her later poetry.
Boettger's wall gecko, also commonly known as the Gran Canaria gecko, is a species of lizard in the family Phyllodactylidae. The species is native to the Canary Islands and the Savage Islands. There are three recognized subspecies.
Iberolacerta cyreni, commonly known as the Cyren's rock lizard, is a species of lizard in the family Lacertidae. The species is endemic to central Spain and is currently listed as endangered by the IUCN due to global warming. I. cyreni has evolved to exhibit key behavioral characteristics, namely individual recognition, in which a lizard is able to identify another organism of the same species, as well as thermoregulation.
Gallotia goliath is an extinct giant lizard species from the island of Tenerife of the Canary Islands, Spain. This reptile lived before the arrival of humans and is believed to have grown to at least 0.9 metres (3.0 ft) long. It was described by the German herpetologist Robert Mertens. Fossils of this lizard have been found in volcanic caves, where they often appear with those of other animals, like the Tenerife giant rat.
Bosc's fringe-toed lizard or Bosk's [sic] fringe-fingered lizard is a species of lizard in the family Lacertidae. The species is endemic to North Africa and Western Asia. Three subspecies are sometimes recognised; A. boskianus boskianus, from Lower Egypt; A. boskianus euphraticus from Iraq; and A. boskianus asper from the rest of the range; however this division is unsatisfactory because each subspecies has much variation and the differences between them are not consistent.
{{cite journal}}
: CS1 maint: multiple names: authors list (link) Database entry includes a range map and justification for why this species is critically endangered