''Anolis roosevelti'', also known commonly as the Virgin Islands giant anole, Roosevelt's giant anole or the Culebra giant anole, is an extremely rare or possibly extinct

species In biology, a species is the basic unit of classification and a taxonomic rank of an organism, as well as a unit of biodiversity. A species is often defined as the largest group of organisms in which any two individuals of the appropriate s ...

lizard Lizards are a widespread group of squamate reptiles, with over 7,000 species, ranging across all continents except Antarctica, as well as most oceanic island chains. The group is paraphyletic since it excludes the snakes and Amphisbaenia alt ...

of the

genus Genus ( plural genera ) is a taxonomic rank used in the biological classification of extant taxon, living and fossil organisms as well as Virus classification#ICTV classification, viruses. In the hierarchy of biological classification, genus com ...

Anolis ''Anolis'' is a genus of anoles (), iguanian lizards in the family Dactyloidae, native to the Americas. With more than 425 species, it represents the world's most species-rich amniote tetrapod genus, although many of these have been proposed to ...

'' in the

family Family (from la, familia) is a Social group, group of people related either by consanguinity (by recognized birth) or Affinity (law), affinity (by marriage or other relationship). The purpose of the family is to maintain the well-being of its ...

Dactyloidae Dactyloidae are a family of lizards commonly known as anoles () and native to warmer parts of the Americas, ranging from southeastern United States to Paraguay. Instead of treating it as a family, some authorities prefer to treat it as a subfami ...

. The species is native to the

Virgin Islands The Virgin Islands ( es, Islas Vírgenes) are an archipelago in the Caribbean Sea. They are geologically and biogeographically the easternmost part of the Greater Antilles, the northern islands belonging to the Puerto Rico Trench and St. Croix ...

and

Vieques Vieques (; ), officially Isla de Vieques, is an island and municipality of Puerto Rico, in the northeastern Caribbean, part of an island grouping sometimes known as the Spanish Virgin Islands. Vieques is part of the Commonwealth of Puerto Rico, ...

Taxonomy and etymology

The Culebra Island giant anole was first described in 1931 by American zoologist

Chapman Grant Chapman Grant (March 27, 1887 – January 5, 1983) was an American herpetologist, historian, and publisher. He was the last living grandson of United States President Ulysses S. Grant. He was married and had two children, one of whom survived him ...

, grandson of

U.S. President The president of the United States (POTUS) is the head of state and head of government of the United States of America. The president directs the executive branch of the federal government and is the commander-in-chief of the United States ...

Grant Grant or Grants may refer to: Places *Grant County (disambiguation) Australia * Grant, Queensland, a locality in the Barcaldine Region, Queensland, Australia United Kingdom *Castle Grant United States * Grant, Alabama *Grant, Inyo County, C ...

. It is named in honor of

Theodore Roosevelt Jr. Theodore Roosevelt III ( ), often known as Theodore Jr.Morris, Edmund (1979). ''The Rise of Theodore Roosevelt''. index.While it was President Theodore Roosevelt who was legally named Theodore Roosevelt Jr., the President's fame made it simple ...

, who was the governor of

Puerto Rico Puerto Rico (; abbreviated PR; tnq, Boriken, ''Borinquen''), officially the Commonwealth of Puerto Rico ( es, link=yes, Estado Libre Asociado de Puerto Rico, lit=Free Associated State of Puerto Rico), is a Caribbean island and Unincorporated ...

at that time. It was initially described as ''Anolis roosevelti'', but some have suggested it should be transferred into the genus '' Xiphosurus'' in 2012. This new classification system is controversial and many have preferred to maintain all anoles in genus ''Anolis''. Poe S (2013). "1986 Redux: New genera of anoles (Squamata: Dactyloidae) are unwarranted". ''Zootaxa'' 3626 (2): 295-299.

Geographic range

''Anolis roosevelti'' is

endemic Endemism is the state of a species being found in a single defined geographic location, such as an island, state, nation, country or other defined zone; organisms that are indigenous to a place are not endemic to it if they are also found elsew ...

to Culebra Island in

, and the

Habitat

''A. roosevelti'' lives in forested zones on the slopes of Mt. Resaca.

Description

''A. roosevelti'' can reach a snout-to-vent length (SVL) of . The color of the body is brown-grey, while the tail has a yellow-brown hue and the abdomen is whitish. The throat fan varies from gray on the upperparts to yellow on the underparts, and the eyelids are yellow. A further feature are two long drawn-out lines on both sides of the body; one starts at the ear, the other at the shoulder.

Reproduction

''A. roosevelti'' is

oviparous Oviparous animals are animals that lay their eggs, with little or no other embryonic development within the mother. This is the reproductive method of most fish, amphibians, most reptiles, and all pterosaurs, dinosaurs (including birds), and ...

Threats

Though ''A. roosevelti'' was only observed again in 1932 after its discovery, there have been unconfirmed sightings since 1973 (the last one in 1978). Some experts believe that it might still exist. It preferred a habitat with

gumbo-limbo ''Bursera simaruba'', commonly known as gumbo-limbo, copperwood, chaca, West Indian birch, naked Indian, and turpentine tree, is a tree species in the family Burseraceae, native to the Neotropics, from South Florida to Mexico and the Caribbean t ...

and

ficus ''Ficus'' ( or ) is a genus of about 850 species of woody trees, shrubs, vines, epiphytes and hemiepiphytes in the family Moraceae. Collectively known as fig trees or figs, they are native throughout the tropics with a few species extending in ...

trees because it fed from the fruits of the trees. Due to human activities the habitat was almost destroyed; only a few specimens of the Culebra Giant Anole can be seen in museums. It was listed as federally

endangered An endangered species is a species that is very likely to become extinct in the near future, either worldwide or in a particular political jurisdiction. Endangered species may be at risk due to factors such as habitat loss, poaching and inva ...

in the

Endangered Species Act The Endangered Species Act of 1973 (ESA or "The Act"; 16 U.S.C. § 1531 et seq.) is the primary law in the United States for protecting imperiled species. Designed to protect critically imperiled species from extinction as a "consequence of ec ...

in 1977.

References

External links

Culebra Island Giant AnoleU.S. Fish and Wildlife Service Division of Endangered Species - Culebra Island Giant Anole

Giant Puerto Rico Lizard listed as Endangered Species
Anoles Lizards of the Caribbean Reptiles of Puerto Rico Culebra, Puerto Rico Critically endangered fauna of North America Critically endangered fauna of the United States Reptiles described in 1931 Taxa named by Chapman Grant ESA endangered species {{lizard-stub