pit viper

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pit viper,

poisonous snakesnake,
common name for an elongated, limbless reptile of the order Squamata, which also includes the xlizards. Most snakes live on the ground, but some are burrowers, arboreal, or aquatic; one group is exclusively marine. In temperate climates they hibernate.
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 of the family Crotalidae, primarily a New World family. Like the Old World true vipersviper,
any of a large number of heavy-bodied, poisonous snakes of the family Viperidae, characterized by erectile, hypodermic fangs. The fangs are folded back against the roof of the mouth except when the snake strikes. Vipers are distributed throughout Eurasia and Africa.
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 (family Viperidae), pit vipers have long, hollow, erectile fangs that are folded back against the roof of the mouth except when the snake is striking. In addition, the pit vipers have developed special organs of heat reception that help them to sense warm-blooded animals, an ability that is especially useful at night, when many of them hunt. These organs consist of pits, for which the group is named, located just behind the nostrils and covered with a temperature-sensitive membrane. Some pit vipers may also use these organs to find cool refuges from inhospitable daytime temperatures.

The largest group of pit vipers is the rattlesnakerattlesnake,
poisonous New World snake of the pit viper family, distinguished by a rattle at the end of the tail. The head is triangular, being widened at the base. The rattle is a series of dried, hollow segments of skin, which, when shaken, make a whirring sound.
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 genus Crotalus, found in North, Central, and N South America. Other New World forms are the fer-de-lancefer-de-lance
, highly poisonous snake, Bothrops atrox, found in tropical South America and the West Indies. A pit viper, related to the bushmaster and the rattlesnake, it has heat-sensitive organs on the head for detecting its warm-blooded prey.
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 (genus Bothrops) and the bushmasterbushmaster,
large venomous snake, Lachesis muta, of Central America and N South America. It is a member of the pit viper family, which also includes the rattlesnake. The largest New World snake, it reaches a length of 8 to 12 ft (2.5–5.5 m).
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 (genus Lachesis). The genus Ancistrodon includes the copperheadcopperhead,
poisonous snake, Ancistrodon contortrix, of the E United States. Like its close relative, the water moccasin, the copperhead is a member of the pit viper family and detects its warm-blooded prey by means of a heat-sensitive organ behind the nostril.
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 and water moccasinwater moccasin
or cottonmouth,
highly venomous snake, Ancistrodon piscivorus, of the swamps and bayous of the S United States. Like the closely related copperhead, it is a pit viper and has a heat-sensitive organ for detecting warm-blooded prey.
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, as well as about a dozen Asian species. Pit vipers are classified in the phylum ChordataChordata
, phylum of animals having a notochord, or dorsal stiffening rod, as the chief internal skeletal support at some stage of their development. Most chordates are vertebrates (animals with backbones), but the phylum also includes some small marine invertebrate animals.
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, subphylum Vertebrata, class Reptilia, family Crotalidae.

References in periodicals archive ?
Thrombocytopenia and coagulation abnormalities are common with pit viper envenomation, and echinocytosis is commonly seen on blood film examination.
He submitted that the poison used in the July 2010 "Lily Robinson and Ready, On the Set, Go" came from the Deinagkistrodon acutus, a Southeast Asian pit viper.
1-4) The majority of venomous snakebites are by pit vipers (rattlesnakes, cottonmouths, and copperheads).
Predictably both pit viper species were found along streams where Hylodes asper was common, a result already pointed out by Hartmann et al.
I've gotten poison ivy, oak, and sumac off of the animals' coats and inhaled these poisons while burning brush piles (that were full of pit vipers and a skunk or two).
Crotalidae Polyvalent Immune Fab (Ovine), an antivenin for the management of patients who have received venomous bites from North American pit viper snakes.
Pit viper snakes have a pair of deep "pits" between the nostril and eye that are in fact heat-sensing organs which let them "see" in the dark.
Atlas Copco introduced the Pit Viper 311 wide-range rotary blasthole drill to the world at MINExpo 2012.
For this latest study, the researchers focused on two closely related species of North American pit viper snakes - the copperhead and the cottonmouth.
Kim HD, Jung MS, Kim SY Exotropia caused by pit viper snakebite.
As per this contract, Atlas Copco will provide Pit Viper 351 blasthole drilling rigs.
Po the pit viper had his first puff when owner Sho Lao threw away a cigarette butt and now has a two-a-day habit.