Pantherophis emoryi

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Pantherophis emoryi
Pantherophis guttatus emoryi.jpg
Scientific classification OOjs UI icon edit-ltr.svg
Domain: Eukaryota
Kingdom: Animalia
Phylum: Chordata
Class: Reptilia
Order: Squamata
Suborder: Serpentes
Family: Colubridae
Genus: Pantherophis
Species:
P. emoryi
Binomial name
Pantherophis emoryi
(Baird & Girard, 1853)
Synonyms [2]

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.

Contents

Etymology

The epithet, emoryi, is in honor of Brigadier General William Hemsley Emory, who was chief surveyor of the U.S. Boundary Survey team of 1852 and collected specimens for the Smithsonian Institution. [3] As such, it is sometimes referred to as Emory's rat snake.

Common names

Additional common names for Pantherophis emoryi include the following: brown rat snake, chicken snake, eastern spotted snake, Emory's Coluber, Emory's pilot snake, Emory's racer, Emory's snake, gray rat snake, mouse snake, prairie rat snake, spotted mouse snake, Texas rat snake, and western pilot snake. [4]

Description

The Great Plains rat snake is typically light gray or tan in color, with dark gray, brown, or green-gray blotching down its back, and stripes on either side of the head which meet to form a point between the eyes. It is capable of growing to 3–5 feet (0.91–1.52 m) in total length (including tail).

Habitat and behavior

The Great Plains rat snake prefers open grassland or lightly forested habitats, but is also found on coastal plains, semi-arid regions, as well as rocky, moderately mountainous regions. It can often be found on farmland, which often leads to its being erroneously called a chicken snake, and other areas with a relatively high rodent population, which is its primary diet. It will also eat birds, and occasionally snakes, lizards and frogs, all of which it subdues by constriction. It is primarily nocturnal, and oviparous, laying clutches of as many as 25 eggs in the late spring. Like most rat snakes, when agitated, the Great Plains rat snake will shake its tail vigorously, which by itself makes no noise, but when it shakes among dry leaf litter, it can sound remarkably like a rattlesnake, and often leads to misidentification. The Great Plains rat snake tends to remain still for a majority of its time awake, which is odd for a nocturnal being. On average, the Great Plains rat snake only moves 188 m (617 ft) per day. The yellow-bellied racer (Coluber constrictor flaviventris), a snake that often lives in the same habitat, moves more often than the Great Plains rat snake, which could lead to a decline in the Great Plains rat snake's population as it is not as mobile. [5]

Warning signs of agitation are curling up tightly and shaking its tail rapidly. Though P. emoryi has very small teeth and is nonvenomous, it will bite. However, as a whole, this species of snake is very calm and non-aggressive.

Taxonomy

This species, Pantherophis emoryi, has undergone extensive reclassification since it was first described by Spencer Fullerton Baird and Charles Frédéric Girard in 1853 as Scotophis emoryi. It has often been placed in the genus Elaphe, but phylogenetic analyses performed in the 2000s have resulted in its transfer to Pantherophis. [6] [7] [8]

P. emoryi has been elevated to full species status and downgraded to a subspecies of P. guttatus multiple times. Most recently, Burbrink suggested that P. guttatus be split into three species: P. guttatus, P. emoryi, and P. slowinskii . [9]

The most recent taxonomic paper on this species complex refutes Burbrink's species suggestions based on more comprehensive sampling and genetic work. "Our data support a revision of the taxonomy of this group, and we recognize two species within the complex and three subspecies within P. emoryi. This study illustrates the importance of thorough sampling of contact zones and consideration of gene flow when delimiting species in widespread complexes containing parapatric lineages." [10]

Related Research Articles

<span class="mw-page-title-main">Rat snake</span> Common name for various snakes

Rat snakes are members – along with kingsnakes, milk snakes, vine snakes and indigo snakes – of the subfamily Colubrinae of the family Colubridae. They are medium to large constrictors and are found throughout much of the Northern Hemisphere. They feed primarily on rodents. Many species make attractive and docile pets and one, the corn snake, is one of the most popular reptile pets in the world. Like all snakes, they can be defensive when approached too closely, handled, or restrained. However, rat snake bites are not dangerous to humans. Like nearly all colubrids, rat snakes pose no threat to humans. Rat snakes were long believed to be completely nonvenomous, but recent studies have shown that some Old World species do possess small amounts of venom, though the amount is negligible relative to humans.

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

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 fossil species of the family date back to the Late Eocene epoch, with earlier origins suspected. Colubrid snakes are found on every continent except Antarctica.

<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">Gray ratsnake</span> Species of nonvenomous snake

The gray ratsnake or gray rat snake, also commonly known as the black ratsnake, central ratsnake, chicken snake, midland ratsnake, or pilot black snake, is a species of nonvenomous snake in the genus Pantherophis in the subfamily Colubrinae. The gray ratsnake is one of about ten species within the American ratsnake genus Pantherophis.

<i>Elaphe</i> Genus of rat snakes

Elaphe is a genus of snakes in the family Colubridae. Elaphe is one of the main genera of the rat snakes, which are found in many regions of the northern hemisphere. Elaphe species are medium to large constrictors by nature.

<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.

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

The trinket snake, also known commonly as the common trinket snake, is a species of nonvenomous constricting snake in the family Colubridae. The species is native to southern Central Asia.

<span class="mw-page-title-main">Mandarin rat snake</span> Species of snake

The mandarin rat snake is a species of nonvenomous colubrid snake endemic to Asia. It is closely related to Euprepiophis conspicillata, the Japanese forest rat snake. Mandarin rat snakes are one of the most popular rat snakes found in the pet trade.

<span class="mw-page-title-main">Radiated ratsnake</span> Species of snake

Coelognathus radiatus, commonly known as the radiated ratsnake, copperhead rat snake, or copper-headed trinket snake, is a nonvenomous species of colubrid snake.

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

<span class="mw-page-title-main">Eastern racer</span> Species of snake

The eastern racer, or North American racer, is a species of nonvenomous snake in the family Colubridae. The species is endemic to North America and Central America. Eleven subspecies, including the nominotypical subspecies, are recognized, which as a group are commonly referred to as the eastern racers. The species is monotypic in the genus Coluber.

<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">Colubrinae</span> Subfamily of snakes

The Colubrinae are a subfamily of snakes within the family Colubridae. It includes numerous genera, and although taxonomic sources often disagree on the exact number, the Reptile Database lists 717 species in 92 genera as of September 2019. It is the second largest subfamily of colubrids, after Dipsadinae. Many of the most commonly known snakes are members of this subfamily, including rat snakes, king snakes, milk snakes, vine snakes, and indigo snakes.

<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>Senticolis</i> Genus of snakes

Senticolis is a genus of nonvenomous snake in the family Colubridae. The genus Senticolis is monotypic, containing the sole species Senticolis triaspis, also known as the green rat snake. The species is endemic to Central America, Mexico, southern Arizona, and southern New Mexico.

<span class="mw-page-title-main">Eastern rat snake</span> Species of snake

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

<span class="mw-page-title-main">Transcaucasian ratsnake</span> Species of snake

The Transcaucasian ratsnake, also commonly known as the Gavand snake, is a species of nonvenomous ratsnake in the family Colubridae. The species is native to Western Asia and the Middle East. There are three recognized subspecies.

<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.

References

  1. ↑ Hammerson GA (2007). "Pantherophis emoryi ". IUCN Red List of Threatened Species . 2007: e.T63861A12723067. doi: 10.2305/IUCN.UK.2007.RLTS.T63861A12723067.en . Retrieved 19 November 2021.
  2. ↑ Pantherophis emoryi at the Reptarium.cz Reptile Database. Accessed 29 March 2021.
  3. ↑ Beolens, Bo; Watkins, Michael; Grayson, Michael (2011). The Eponym Dictionary of Reptiles. Baltimore: Johns Hopkins University Press. xiii + 296 pp. ISBN   978-1-4214-0135-5. (Pantherophis emoryi, pp. 83-84).
  4. ↑ Wright AH, Wright AA (1957). Handbook of Snakes of the United States and Canada. Ithaca and London: Comstock. 1,105 pp. (in 2 volumes) (Elaphe emoryi emoryi, pp. 218-223, Figure 68, Map 23).
  5. ↑ Klug, Page E.; Fill, Jennifer; With, Kimberly A. (2011). "Spatial ecology of eastern yellow-bellied racer (Coluber constrictor flaviventris) and Great Plains rat snake (Pantherophis emoryi) in a contiguous tallgrass-prairie landscape". Herpetologica. 67 (4): 428–439. doi:10.1655/HERPETOLOGICA-D-10-00076.1. S2CID   3065840.
  6. ↑ Utiger, Urs; Helfenberger, Notker; Schätti, Beat; Schmidt, Catherine; Ruf, Markus; Ziswiler, Vincent (2002). "Molecular systematics and phylogeny of Old and New World ratsnakes, Elaphe Auct., and related genera (Reptilia, Squamata, Colubridae)". Russian Journal of Herpetology. 9 (2): 105–124. doi:10.30906/1026-2296-2002-9-2-105-124 (inactive 1 November 2024).{{cite journal}}: CS1 maint: DOI inactive as of November 2024 (link)
  7. ↑ Burbrink, Frank T.; Lawson, Robin (2007). "How and when did Old World ratsnakes disperse into the New World?". Molecular Phylogenetics and Evolution. 43 (1): 173–189. Bibcode:2007MolPE..43..173B. doi:10.1016/j.ympev.2006.09.009. PMID   17113316.
  8. ↑ Pyron, R. Alexander; Burbrink, Frank T. (2009). "Neogene diversification and taxonomic stability in the snake tribe Lampropeltini (Serpentes: Colubridae)". Molecular Phylogenetics and Evolution. 52 (2): 524–529. Bibcode:2009MolPE..52..524P. doi:10.1016/j.ympev.2009.02.008. PMID   19236930.
  9. ↑ Burbrink F (2002). "Phylogeographic analysis of the cornsnake (Elaphe guttata) complex as inferred from maximum likelihood and Bayesian analyses". Molecular Phylogenetics and Evolution. 25 (3): 465–476. Bibcode:2002MolPE..25..465B. doi:10.1016/S1055-7903(02)00306-8. PMID   12450751.
  10. ↑ Marshall, Thomas L.; Chambers, E. Anne; Matz, Mikhail V.; Hillis, David M. (September 2021). "How mitonuclear discordance and geographic variation have confounded species boundaries in a widely studied snake". Molecular Phylogenetics and Evolution. 162: 107194. Bibcode:2021MolPE.16207194M. doi:10.1016/j.ympev.2021.107194. PMID   33940060.

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