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Pantherophis spiloides — Pyron & Burbrink, 2009 The gray ratsnake or gray rat snake ( Pantherophis alleghaniensis ), [ 5 ] 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 . [ 6 ]
In 2021, genetic analysis found that the holotype for P. allegheniensis belongs to the species known as Pantherophis spiloides, commonly called the central or gray rat snake. This species is now known to occupy a range between the Mississippi River in the west and the Piedmont in the east, north to New England.
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.
Their eyes remain dark. They range in appearance between amelanistic corn snakes to normal corn snakes with greatly reduced melanin. Ultra – A hypomelanistic-like gene that is an allele to the amelanistic gene. Ultra corn snakes have light gray lines in place of black. The Ultra gene is derived from the gray rat snake (Pantherophis spiloides ...
Pantherophis obsoletus, also known commonly as the western rat snake, black rat snake, pilot black snake, or simply black snake, [5] is a nonvenomous species of snake in the family Colubridae. The species is native to central North America .
Pantherophis spiloides (A. M. C. Duméril, Bibron, & A. H. A. Duméril, 1854) Abundant [n 3] The taxonomy of the genus Pantherophis, and especially P. alleghaniensis and P. spiloides, are in flux, and the names and validity of this species are prone to change Generally west of the Appalachians: Eastern hog-nosed snake: Heterodon platirhinos ...
Across their range in North America each species of rat snake has different ideal body temperatures. In Ontario, the average ideal body temperature of a rat snake is 28.1 degrees Celsius with free ranging gravid females tending to require a bit higher in order to meet their thermoregulatory requirements for gestation . [ 15 ]
This is a checklist of American reptiles found in Northern America, based primarily on publications by the Society for the Study of Amphibians and Reptiles (SSAR). [1] [2] [3] It includes all species of Bermuda, Canada, Greenland, Saint Pierre and Miquelon, and the United States including recently introduced species such as chameleons, the Nile monitor, and the Burmese python.