Short-tailed snake

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Short-tailed snake
Stilosoma extenuatum.jpg
Scientific classification OOjs UI icon edit-ltr.svg
Domain: Eukaryota
Kingdom: Animalia
Phylum: Chordata
Class: Reptilia
Order: Squamata
Suborder: Serpentes
Family: Colubridae
Genus: Lampropeltis
Species:
L. extenuata
Binomial name
Lampropeltis extenuata
(Brown, 1890)
Synonyms
  • Stilosoma extenuataBrown, 1890
  • Stilosoma extenuatum Cope, 1892
  • Stylophis extenuatus Berg, 1901
  • Stylophis extenuatus
    Stejneger & Barbour, 1917
  • Stilosoma extenuatum
    Stejneger & Barbour, 1933 [1]
  • Lampropeltis extenuata
    Pyron & Burbrink, 2009 [2]

The short-tailed snake (Lampropeltis extenuata) is a small harmless colubrid snake. Fossorial and seldom seen, it is found only in sandy, upland parts of Florida where it is listed as Threatened and is protected by state law.

Contents

Etymology

Hernando County, FL 2011 Short-Tailed Snake close up.jpg
Hernando County, FL 2011

The short-tailed snake's tail comprises less than 10 percent of the snake's total length, hence the common name. Named by A. Erwin Brown in 1890, [3] Stilosoma extenuatum derives its generic name from the Greek stylos for pillar and soma for body. This refers to the stiffness of the short-tailed snake's body, [4] which is caused by its wide and inflexible column of unusually short vertebrae. The specific name, extenuatum, is Latin for thin or slender.

Description

The short-tailed snake is a small serpent averaging 36–51 cm (14–20 in) in total length, with a record total length measurement of 65.4 cm (25+34 in), [5] and is perhaps as thin as a pencil. It is gray above with 50 to 80 dark blotches and may or may not have a yellow stripe running down the spine. The underside is white with dark brown blotches. It bears a more-than-superficial resemblance to other kingsnakes, especially the mole kingsnake ( Lampropeltis calligaster rhombomaculata ), but can be distinguished by its smaller size and much more slender build. [6] Also, Lampropeltis extenuatum has six upper labials, whereas kingsnakes (genus Lampropeltis ) have seven upper labials. [7]

Behavior

Hernando County, FL 2011 Short-Tailed Snake Central Florida.jpg
Hernando County, FL 2011

The short-tailed snake is as poorly understood as it is seldom-seen, rare and geographically limited. It is a burrowing snake that rarely appears above ground and does so even more rarely during the day. Like other snakes of the tribe Lampropeltini, it vibrates its tail when startled by predators or people but can be distinguished from a rattlesnake by its slender build and lack of a rattle. An excitable snake, it makes a poor captive and is protected against harassment or captivity by Florida law. Despite this, much of what little we know about the short-tailed snake has been based on observations of captive specimens.

Diet

Captive specimens show a keen preference for black-crowned snakes of the genus Tantilla and will often eat them exclusively, rejecting other species of small snake or lizard. It is possible that black-crowned snakes, some of which are themselves small, burrowing snakes endemic to Florida, comprise the entire diet of wild short-tailed snakes.

Habitat and range

Marion County, FL Short-tailed Snake.JPG
Marion County, FL

Found only in a handful of counties in central Florida, the short-tailed snake prefers sandy-soiled pine or oak woodlands, but may be found in other habitats, provided it has access to prey and suitable soil for burrowing.

Evolution and taxonomy

As a member of the tribe Lampropeltini, L. extenuata is ultimately derived from Old World rat snakes that crossed the Bering Land Bridge into North America more than 20 million years ago. [8] More recently, L. extenuata is a relict of the Miocene "Florida Island", separated from the mainland by higher sea levels. It is closely related to the kingsnakes and still bears a resemblance to the mole kingsnakes which are also found in Florida. One fossil species, Stilosoma vetustum, dates from the late Miocene, some 5-10 million years ago. [9] How far divergent L. extenuata is from its kingsnake ancestors is still a matter of debate. In 2009 Pyron and Burbrink resolved to include it in the kingsnake genus Lampropeltis based on multiple lines of molecular and morphological evidence obtained in theirs and earlier studies. [10]

Related Research Articles

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The corn snake, sometimes called red rat snake, is a species of North American rat snake in the family Colubridae. The species subdues its small prey by constriction. It is found throughout the southeastern and central United States. Though superficially resembling the venomous copperhead and often killed as a result of this mistaken identity, the corn snake lacks functional venom and is harmless. The corn snake is beneficial to humans because it helps to control populations of wild rodent pests that damage crops and spread disease.

<span class="mw-page-title-main">Colubridae</span> Family of snakes

Colubridae 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 every continent except Antarctica.

<span class="mw-page-title-main">Kingsnake</span> Genus of snakes

Kingsnakes are colubrid New World members of the genus Lampropeltis, which includes 26 species. Among these, about 45 subspecies are recognized. They are nonvenomous and ophiophagous in diet.

<i>Pantherophis obsoletus</i> Species of snake

Pantherophis obsoletus, also known commonly as the western rat snake, black rat snake, pilot black snake, or simply black snake, is a nonvenomous species of snake in the family Colubridae. The species is native to central North America. There are no subspecies that are recognized as being valid. Its color variations include the Texas rat snake. Along with other snakes of the eastern United States, like the eastern indigo snake and the eastern racer, it is called “black snake”.

<span class="mw-page-title-main">Scarlet kingsnake</span> Species of snake

The scarlet kingsnake or scarlet milk snake is a species of kingsnake found in the southeastern and eastern portions of the United States. Like all kingsnakes, they are nonvenomous. They are found in pine flatwoods, hydric hammocks, pine savannas, mesic pine-oak forests, prairies, cultivated fields, and a variety of suburban habitats; not unusually, people find scarlet kingsnakes in their swimming pools, especially during the spring. Until recently, and for much of the 20th century, scarlet kingsnakes were considered a subspecies of the milk snake; however, Pyron and Bubrink demonstrated the phylogenetic distinction of this species and its closer relationship to the mountain kingsnakes of the southwestern United States. These largely fossorial snakes are the smallest of all the species within the genus Lampropeltis, usually ranging from 40 to 50 cm at maturity. The maximum recorded length is in Jonesboro, AR 76.2 cm (30.0 in). Hatchlings range in size from 8 to 18 cm .

<i>Xenopeltis</i> Genus of snakes

Xenopeltis, the sunbeam snakes, are the sole genus of the monotypic family Xenopeltidae, the species of which are found in Southeast Asia. Sunbeam snakes are known for their highly iridescent scales. Three species are recognized, each one with no subspecies. Studies of DNA suggest that the xenopeltids are most closely related to the Mexican burrowing python and to the true pythons (Pythonidae).

<span class="mw-page-title-main">Gray-banded kingsnake</span> Species of snake

The gray-banded kingsnake, sometimes referred to as the alterna or the Davis Mountain king snake, is a species of nonvenomous snake in the family Colubridae. The species is endemic to the southwestern United States and adjacent Mexico. Some sources list two distinct subspecies of Lampropeltis alterna, as L. a. alterna and L. a. blairi differentiated by patterning and locale, but research has shown them to be color morphs of the same species.

<i>Pantherophis</i> Genus of snakes

Pantherophis is a genus of nonvenomous colubrid snakes endemic to central and eastern regions of North America. It consists of the North American ratsnakes, the foxsnakes, and the cornsnakes. The genus, which contains 10 recognized species, first appeared in the fossil record in the Middle Miocene around 16.3 million years ago. They are a large terrestrial snake genus that lack subocular scales. Originally classified in the genus Elaphe, phylogenetic studies have found this taxon to be closely related to Pituophis. As with all snakes Pantherophis is an obligate faunivore with a diet that consists of small mammals, birds, reptiles and amphibians, and even insects. While many species conservation status is categorized as "least concern", many local populations in some species have declined where some places have them listed as federally protected. The corn snake is a popular pet reptile, due to the availability of captive-bred animals, their low maintenance and calm disposition, and the variety of color morphs. There are other species of Pantherophis that are in the pet trade, though are not as popular as the corn snake.

The eastern trinket snake is a species of snake in the family Colubridae. The species is endemic to South Asia.

<i>Lampropeltis calligaster</i> Species of snake

Lampropeltis calligaster is a species of kingsnake known commonly as the prairie kingsnake or yellow-bellied kingsnake.

<i>Pantherophis emoryi</i> Species of snake

Pantherophis emoryi, commonly known as the Great Plains rat snake, is a species of nonvenomous rat snake in the family Colubridae. The species is native to the central part of the United States, from Missouri to Nebraska, to Colorado, south to Texas, and into northern Mexico.

<i>Pantherophis bairdi</i> Species of snake

Pantherophis bairdi is a species of harmless snake in the family Colubridae. The species is native to the southwestern United States and adjacent northeastern Mexico. No subspecies are recognized as being valid.

<span class="mw-page-title-main">Slowinski's corn snake</span> Subspecies of snake

Slowinski's corn snake is a subspecies of nonvenomous snake in the family Colubridae. The subspecies is indigenous to Louisiana, eastern Texas, and Arkansas.

<i>Lampropeltis rhombomaculata</i> Subspecies of snake

Lampropeltis rhombomaculata, commonly known as the mole kingsnake or the brown kingsnake, is a species of snake in the family Colubridae. It is a relatively medium-sized snake that occupies a variety of habitats from Baltimore, Maryland, south through the Florida Panhandle and west into Mississippi and Tennessee.

<i>Cemophora coccinea coccinea</i> Subspecies of snake

Cemophora coccinea coccinea, commonly known as the Florida scarlet snake, is the nominotypical subspecies of the scarlet snake. It is a nonvenomous colubrid snake that is endemic to the southeastern United States.

<i>Pantherophis alleghaniensis</i> Species of snake

Pantherophis alleghaniensis, commonly called the eastern rat snake, is a species of nonvenomous snake in the family Colubridae. The species is endemic to North America.

<i>Lampropeltis nigra</i> Species of snake

Lampropeltis nigra, commonly known as the black kingsnake, is a species of nonvenomous colubrid snake indigenous to the United States. It is a species of kingsnake.

<i>Elaphe moellendorffi</i> Species of snake

Elaphe moellendorffi, commonly called the flower snake or Moellendorf's [sic] rat snake, is a species of snake in the family Colubridae. The species is endemic to southeastern Asia.

<span class="mw-page-title-main">Lampropeltini</span> Tribe of snakes

Lampropeltini is a tribe of colubrid snake endemic to New World. These include the kingsnakes, milk snake, corn snake, gopher snakes, pine snakes, and bullsnakes. At least 51 species have been recognized and the group have been heavily studied for biogeography, morphology, ecology, and phylogenetics. The internal relationships among the genera has been disputed, but generally the most supported placement of the genera are as follows:

References

  1. Highton, R. 1956. Systematics and Variation of the Endemic Florida Snake Genus Stilosoma. Bull. Florida State Mus., Biol. Sci. 1 (2): 73-96. ("Taxonomy and Nomenclature", pp. 80-82.)
  2. The Reptile Database. www.reptile-database.org.
  3. Boulenger, G.A. 1894. Catalogue of the Snakes in the British Museum (Natural History). Volume II., Containing the Conclusion of the Colubridæ Aglyphæ. Trustees of the British Museum (Natural History). (Taylor and Francis, Printers.) London. xi + 382 pp. + Plates I.- XX. (Stilosoma extenuatum, p. 325.)
  4. Schmidt, K.P., and D.D. Davis. 1941. Field Book of Snakes of the United States and Canada. G.P. Putnam's Sons. New York. 365 pp. (Stilosoma extenuatum, pp. 191-192, Figure 59. + Plate 21.)
  5. Conant, R. 1975. A Field Guide to Reptiles and Amphibians of Eastern and Central North America, Second Edition. Houghton Mifflin. Boston. 429 pp.
    ISBN   0-395-19977-8 (paperback). (Stilosoma extenuatum, p. 213 + Plate 21 + Map 162.)
  6. Wright, A.H., and A.A. Wright. 1957. Handbook of Snakes of the United States and Canada. Comstock. Ithaca and London. 1,105 pp. (in two volumes) (Genus Stilosoma, p. 692; and Stilosoma extenuatum, pp. 693-696, Map 52 + Figure 204. on p. 698.)
  7. Smith, H.M., and E.D. Brodie, Jr. 1982. Reptiles of North America: A Guide to Field Identification. Golden Press. New York. 240 pp. ISBN   0-307-13666-3 (paperback). (Stilosoma extenuatum, pp. 178-179.)
  8. Burbrink, F. T.; Lawson, R. (2007). "How and when did Old World ratsnakes disperse into the New World?". Molecular Phylogenetics and Evolution. 43 (1): 173–189. doi:10.1016/j.ympev.2006.09.009. PMID   17113316.
  9. Pyron, R. A.; Burbrink, F. T. (2012). "Trait-dependent diversification and the impact of palaeontological data on evolutionary hypothesis testing in New World ratsnakes (tribe Lampropeltini)". Journal of Evolutionary Biology. 25 (3): 497–508. doi: 10.1111/j.1420-9101.2011.02440.x . PMID   22226034.
  10. Pyron, R. A.; Burbrink, F. T. (2009). "Neogene diversification and taxonomic stability in the snake tribe Lampropeltini (Serpentes: Colubridae)". Molecular Phylogenetics and Evolution. 52 (2): 524–529. doi:10.1016/j.ympev.2009.02.008. PMID   19236930.

Further reading