| Sonora palarostris | |
|---|---|
Scientific classification  | |
| Domain: | Eukaryota |
| Kingdom: | Animalia |
| Phylum: | Chordata |
| Class: | Reptilia |
| Order: | Squamata |
| Suborder: | Serpentes |
| Family: | Colubridae |
| Genus: | Sonora |
| Species: | S. palarostris |
| Binomial name | |
| Sonora palarostris (Klauber, 1937) | |
 | |
| Synonyms | |
| |
Sonora palarostris, commonly known as the Sonoran shovelnose snake, is a species of small nonvenomous colubrid which is a native of the Sonoran Desert in North America.
The specific name, palarostris, is from Latin: pāla (shovel) and rōstrum (beak or snout).
S. palarostris is found in the southwestern United States and northwestern Mexico. In the United States it is found only in Organ Pipe Cactus National Monument of western Pima County, Arizona. The subspecies occurring there is called the Organ Pipe shovelnose snake (C. p. organica). In Mexico it is found only in the state of Sonora. [2]
S. palarostris is cross-banded with black, yellow (or whitish), and red bands. Consequently, it resembles the Sonoran coral snake ( Micruroides euryxanthus ). The mnemonic "red on yellow kill a fellow, red on black, friend of Jack" doesn't work with this snake. However, unlike the coral snake, which has a black snout, Sonora palarostris has a yellow snout and is not venomous. Also on a coral snake, the bands go all the way around, but S. palarostris has a solid yellow belly. [3]
The smooth dorsal scales are arranged in 15 rows at midbody; ventrals, 141–181; subcaudals, 34–64, divided. [3]
Maximum total length (including tail) of adults is 43 cm (17 in).
Two subspecies are recognized, including the nominotypical subspecies.
S. palarostris is active in the evening and at night, mostly near washes.
Arizona elegans is a species of medium-sized colubrid snake commonly referred to as the glossy snake or the faded snake, which is endemic to the southwestern United States and Mexico. It has several subspecies. Some have recommended that A. elegans occidentalis be granted full species status.
Rena humilis, known commonly as the western blind snake, the western slender blind snake, or the western threadsnake, is a species of snake in the family Leptotyphlopidae. The species is endemic to the southwestern United States and northern Mexico. Six subspecies are currently recognized, including the nominate subspecies described here.
Rena dulcis, also known commonly as the Texas blind snake, the Texas slender blind snake, or the Texas threadsnake, is a species of snake in the family Leptotyphlopidae. The species is endemic to the Southwestern United States and adjacent northern Mexico. Three subspecies are currently recognized, including the nominate subspecies described here.
Crotalus stephensi is a venomous pitviper species found in central and southern Nevada and adjacent California. Common names include panamint rattlesnake, panamint rattler, Owens Valley rattler, and tiger rattlesnake.
Uropeltis macrolepis, commonly known as the Bombay earth snake, the Bombay shieldtail, and the large-scaled shieldtail, is a species of snake in the family Uropeltidae. The species is endemic to southern India. There are two recognized subspecies.
Pituophis catenifer affinis, commonly known as the Sonoran gopher snake, is a nonvenomous subspecies of colubrid snake that is endemic to the southwestern United States. It is one of six recognized subspecies of the gopher snake, Pituophis catenifer.
Crotalus basiliscus, known as the Mexican west coast rattlesnake, Mexican green rattler, and also by other names, is a species of pit viper in the family Viperidae. The species is endemic to western Mexico. Like all other pit vipers, it is venomous. The specific name, basiliscus, is derived from the Greek word for king, βασιλισκος, and alludes to this snake's large size and potent venom. No subspecies are currently recognized.
Crotalus viridis is a venomous pit viper species native to the western United States, southwestern Canada, and northern Mexico. Currently, two subspecies are recognized, including the prairie rattlesnake, the nominate subspecies, and the Hopi rattlesnake.
Sistrurus tergeminus edwardsii, also known as the desert massasauga, is a subspecies of venomous pit viper in the family Viperidae. The subspecies is endemic to the Southwestern United States and northern Mexico. In places, its range overlaps that of S. t. tergeminus, and intergrading of the two subspecies is known.
Arizona elegans philipi, commonly known as the Painted Desert glossy snake, is a subspecies of glossy snakes, a nonvenomous colubrid endemic to North America.
Crotalus oreganus abyssus is a venomous pit viper subspecies found only in the U.S. states of Arizona and Utah.
The Great Basin rattlesnake is a venomous pit viper species found in the Great Basin region of the United States.
Crotalus cerastes cercobombus, commonly known as the Sonoran Desert sidewinder or Sonoran sidewinder, is a pitviper subspecies found in the eastern part of the Sonoran Desert in the southwestern United States and northwestern Mexico. Like all pitvipers, it is venomous. The subspecific epithet means buzzertail.
The western banded gecko is a species of lizard in the family Eublepharidae. The species is native to the southwestern United States and adjacent northwestern Mexico. Five subspecies are recognized.
Crotalus angelensis, or the Ángel de la Guarda Island speckled rattlesnake, is a pitviper species endemic to Isla Ángel de la Guarda in the Gulf of California, Mexico. Like all other pitvipers, it is venomous. It is sometimes treated as a subspecies of Crotalus mitchellii.
Crotalus mitchellii muertensis is a venomous pitviper subspecies endemic to El Muerto Island, Mexico. It is sometimes treated as a full species, Crotalus muertensis.
Salvadora hexalepis, the western patch-nosed snake, is a species of non-venomous colubrid snake, which is endemic to the southwestern United States and northern Mexico.
Micruroides is a genus of venomous coral snake in the family Elapidae. The genus is monotypic, containing only the species Micruroides euryxanthus.
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