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 ?
Some of these were for two very large clients, such as Kazakhstan's biggest copper miner, which ordered a Sandvik D55SP simulator, and a major manganese producer in South Africa, which ordered two drill simulators for the Atlas Copco Pit Viper 271 and Sandvik DR580.
The name pit viper is derived from the presence of a heat sensing pit organ located on the head.
The initial symptoms after a bite from a pit viper are usually pain and swelling around the bite, with physical signs of fang marks, hemorrhagic vesicles, and tenderness at the bite site.
Effects of green pit viper (Trimeresurus erythrurus and Trimeresurus popeorum) venoms on blood coagulation, platelets and the fibrinolytic enzyme systems: studies in vivo and in vitro.
Two published estimates of apparent annual survival for North American pit vipers based on robust estimators for timber rattlesnakes Crotalus horridus (Brown et al.
In a later stomach content analysis performed by opening the stomach and intestines of this pit viper specimen, an undigested Porthidium lansbergii (Schlegel, 1841) neonate (ANDES-R 171), with a total length of 180 mm, was found (Fig.
COTTONMOUTH FAMILY (AKA WATER MOCCASIN): a heavy bodied, dark gray or brown pit viper with darker bands (sometimes appears as almost solid gray or black).
The most serious effects of most pit viper bites, including that of rattlers, is extensive local tissue damage and serious coagulopathies.
The venom of a Malaysian pit viper has a chemical in it that prevents blood from clotting.
is a brittle woman whom Fonda imbues with all the warmth of a pit viper.
The gorgeous Sabah Pit Viper looks like a garden hose with an attitude and has so far eluded much observation while the Keeled Rat Snake, which actually does resemble a rat, keeps no secrets as to its habits and eggs.