The Saint Croix racer (''Borikenophis sanctaecrucis'')
[ www.reptile-database.org.] is a possibly
extinct
Extinction is the termination of a kind of organism or of a group of kinds (taxon), usually a species. The moment of extinction is generally considered to be the death of the last individual of the species, although the capacity to breed and ...
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 ...
of
snake
Snakes are elongated, Limbless vertebrate, limbless, carnivore, carnivorous reptiles of the suborder Serpentes . Like all other Squamata, squamates, snakes are ectothermic, amniote vertebrates covered in overlapping Scale (zoology), scales. Ma ...
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 ...
Colubridae
Colubridae (, commonly known as colubrids , from la, coluber, 'snake') is a family of snakes. With 249 genera, it is the largest snake family. The earliest species of the family date back to the Oligocene epoch. Colubrid snakes are found on ever ...
. The species 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 the island of
Saint Croix
Saint Croix; nl, Sint-Kruis; french: link=no, Sainte-Croix; Danish and no, Sankt Croix, Taino: ''Ay Ay'' ( ) is an island in the Caribbean Sea, and a county and constituent district of the United States Virgin Islands (USVI), an unincorpo ...
,
United States Virgin Islands
The United States Virgin Islands,. Also called the ''American Virgin Islands'' and the ''U.S. Virgin Islands''. officially the Virgin Islands of the United States, are a group of Caribbean islands and an unincorporated and organized territory ...
.
Etymology
The
specific name, ''sanctaecrucis'', refers to the island of Saint Croix, on which the
holotype
A holotype is a single physical example (or illustration) of an organism, known to have been used when the species (or lower-ranked taxon) was formally described. It is either the single such physical example (or illustration) or one of several ...
was collected.
[
]
Description
''B. sanctaecrucis'' may attain a snout-to-vent length (SVL) of . It has smooth dorsal scales
In snakes, the dorsal scales are the longitudinal series of plates that encircle the body, but do not include the ventral scales. Campbell JA, Lamar WW (2004). ''The Venomous Reptiles of the Western Hemisphere''. Ithaca and London: Comstock Publis ...
, which are arranged in 17 rows at midbody. The holotype has a total length of , which includes a tail long.[ Cope ED (1860).]
''B. sanctaecrucis'' 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 ...
.
Habitat
The preferred natural habitat
In ecology, the term habitat summarises the array of resources, physical and biotic factors that are present in an area, such as to support the survival and reproduction of a particular species. A species habitat can be seen as the physical ...
of ''B. sanctaerucis'' is xeric
Deserts and xeric shrublands are a biome defined by the World Wide Fund for Nature. Deserts and xeric (ancient Greek xērós, “dry") shrublands form the largest terrestrial biome, covering 19% of Earth's land surface area. Ecoregions in this h ...
forest.
Conservation
''B. sanctaecrucis'' is feared extinct; it has not been recorded in over 100 years, since the holotype was collected; St. Croix is a densely-populated, and the species is a fairy large snake. If it is extinct, the most probable causes were due to predation from introduced mongooses
A mongoose is a small terrestrial carnivorous mammal belonging to the family Herpestidae. This family is currently split into two subfamilies, the Herpestinae and the Mungotinae. The Herpestinae comprises 23 living species that are native to so ...
and deforestation of its habitat. However, recent rediscoveries of other Caribbean reptiles that were also thought extinct brings hope that a small population (probably less than 50 individuals) of ''B. sanctaecrucis'' survives somewhere in St. Croix.
References
Further reading
* Boulenger GA (1894). ''Catalogue of the Snakes in the British Museum (Natural History). Volume II. Containing the Conclusion of the Colubridæ Aglyphæ''. London: Trustees of the British Museum (Natural History). (Taylor and Francis, printers). xi + 382 pp. + Plates I-XX. (''Dromicus sanctæ-crucis'', new combination and emendation, p. 122).
* Cope ED (1862). "Synopsis of the Species of ''Holcosus'' and ''Ameiva'', with Diagnoses of new West Indian and South American Colubridæ". ''Proceedings of the Academy of Natural Sciences of Philadelphia'' 14: 60–82. (''Alsophis sancticrucis'', new species, p. 76).
* Hedges SB, Couloux A, Vidal N (2009). "Molecular phylogeny, classification, and biogeography of West Indian racer snakes of the Tribe Alsophini (Squamata, Dipsadidae, Xenodontinae)". ''Zootaxa'' 2067: 1–28. (''Borikenophis sanctaecrucis'', new combination).
* Schwartz A, Henderson RW (1991). ''Amphibians and Reptiles of the West Indies: Descriptions, Distributions, and Natural History''. Gainesville: University of Florida Press. 720 pp. . (''Alsophis sanctaecrucis'', p. 576).
*Schwartz A, Thomas R
Thomas may refer to:
People
* List of people with given name Thomas
* Thomas (name)
* Thomas (surname)
* Saint Thomas (disambiguation)
* Thomas Aquinas (1225–1274) Italian Dominican friar, philosopher, and Doctor of the Church
* Thomas the A ...
(1975). ''A Check-list of West Indian Amphibians and Reptiles''. Carnegie Museum of Natural History
The Carnegie Museum of Natural History (abbreviated as CMNH) is a natural history museum in the Oakland neighborhood of Pittsburgh, Pennsylvania. It was founded by Pittsburgh-based industrialist Andrew Carnegie in 1896.
Housing some 22 millio ...
Special Publication No. 1. Pittsburgh, Pennsylvania: Carnegie Museum of Natural History. 216 pp. (''Alsophis sancticrucis'', p. 173).
Borikenophis
Endemic fauna of the United States Virgin Islands
Reptiles of the United States Virgin Islands
Reptiles described in 1862
Taxonomy articles created by Polbot
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