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Amphibian

Amphibians (class Amphibia) are a taxon of animals that include all tetrapods (four-legged vertebrates) that do not have amniotic eggs. Amphibians (from Greek αμφις "both" and βιος "life") generally spend part of their time on land, but they do not have the adaptations to an entirely terrestrial existence found in most other modern tetrapods (amniotes). more...

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There are about 5,700 living species of amphibians. The study of amphibians and reptiles is known as herpetology. The fear of amphibians and reptiles is known as herpetophobia.

History of amphibians

Amphibians developed with the characteristics of pharyngeal slits/gills, a dorsal nerve cord, a notochord, and a post-anal tail at different stages of their life. They have persisted since the dawn of tetrapods 390 million years ago in the Devonian period, when they were the first four-legged animals to develop lungs. During the following Carboniferous period they also developed the ability to walk on land to avoid aquatic competition and predation while allowing them to travel from water source to water source. As a group they maintained the status of the dominant animal for nearly 75 million years. Throughout their history they have ranged in size from the 3 foot long Devonian Ichthyostega, to the slightly larger 5 foot long Permian Eryops, and down to the tiny Brachycephalus didactylus (Brazilian Gold Frog) and Eleutherodactylus iberia from Cuba, with a total length of 9.6-9.8 millimeters. Amphibians have mastered almost every climate on earth from the hottest deserts to the frozen arctic, and have adapted to climatic change with ease.

  • Solomon Berg Martin, Biology
  • Duellman/Trueb, Biology of Amphibians

Read more at Wikipedia.org


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Smith & Wesson Men's Sww-1100 Amphibian Commando Black Glowing Dial Rubber BandSmith & Wesson Men's Sww-1100 Amphibian Commando Black Glowing Dial Rubber Band $64.75 Made in Russia Amphibian Automatic Shock Resistant Men's Vintage WatchMade in Russia Amphibian Automatic Shock Resistant Men's Vintage Watch $71.97 Was:  Previous Price $119.95
Russian Mechanical Automatic Wrist Watch Vostok AmphibianRussian Mechanical Automatic Wrist Watch Vostok Amphibian $70.00 Voctok Russian Ussr Navy Commander Wind Up WatchVoctok Russian Ussr Navy Commander Wind Up Watch $53.99 Was:  Previous Price $59.99
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		Men’s Vostok Amphibian. Wave dial with Perlon strap. Russian.New listing Men’s Vostok Amphibian. Wave dial with Perlon strap. Russian. $84.99 Vintage Russian Diver Watch Navy Military Watch Vostok AmphibianVintage Russian Diver Watch Navy Military Watch Vostok Amphibian $99.00
Vtg Kgb Amphibian Automatic Mechanical Watch Soviet Union Ussr Russian MilitaryVtg Kgb Amphibian Automatic Mechanical Watch Soviet Union Ussr Russian Military $67.00 Smith & Wesson Men's Amphibian Commando 30 M Water Resistant Watch New BattSmith & Wesson Men's Amphibian Commando 30 M Water Resistant Watch New Batt $35.00
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		Soviet Ussr Vostok Komandirskie Amphibian Submarine Antimagnetic Watch Nos 62MasNew listing Soviet Ussr Vostok Komandirskie Amphibian Submarine Antimagnetic Watch Nos 62Mas $49.99 Smith & Wesson Watch New Men's Amphibian Commando Sww-1100Smith & Wesson Watch New Men's Amphibian Commando Sww-1100 $47.55
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Vostok Amphibian Russian Military Diver's Mechanical Men's Watch 420945Vostok Amphibian Russian Military Diver's Mechanical Men's Watch 420945 $99.99 Kgb Amphibian Automatic Men's Mechanical Wristwatch 200 MetersKgb Amphibian Automatic Men's Mechanical Wristwatch 200 Meters $75.00
Vostok Amphibian Classic 120509 Russian Men's Watch, New In BoxVostok Amphibian Classic 120509 Russian Men's Watch, New In Box $75.00 Smith & Wesson Mens Amphibian Commando 30 m Water Resistant WatchSmith & Wesson Mens Amphibian Commando 30 m Water Resistant Watch $47.10 Was:  Previous Price $50.11
Vintage Russian Vostok Amphibian Albatross Diver Watch Ussr *Us Seller* #1522Vintage Russian Vostok Amphibian Albatross Diver Watch Ussr *Us Seller* #1522 $99.00 Smith & Wesson Amphibian Commando Watch #Sww-1100Smith & Wesson Amphibian Commando Watch #Sww-1100 $52.95
Ussr Military Vostok Amphibian Diver diver's watch Ussr Diver Anti-magnetic Wh11Ussr Military Vostok Amphibian Diver diver's watch Ussr Diver Anti-magnetic Wh11 $89.99 New Smith & Wesson Men's Amphibian Commando Sww1100New Smith & Wesson Men's Amphibian Commando Sww1100 $47.63
Russian Vostok Amphibian Auto Watch KgbRussian Vostok Amphibian Auto Watch Kgb $25.00 Amphibian Commando WatchAmphibian Commando Watch $61.28
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		Men’s Vostok Amphibian wrist watch. White face. Russian!New listing Men’s Vostok Amphibian wrist watch. White face. Russian! $59.99 russian amphibian military Automaticrussian amphibian military Automatic $63.00
Mens Russia Amphibian 200m Colorful Ship Dial 17J Ussr Diver Watch Retro CompassMens Russia Amphibian 200m Colorful Ship Dial 17J Ussr Diver Watch Retro Compass $89.99 Smith & Wesson Sww-1100 Black Stainless Men's Amphibian Commando WatchSmith & Wesson Sww-1100 Black Stainless Men's Amphibian Commando Watch $46.61 List price:  Previous Price $62.46
Blue Ussr mechanical men's watch Vostok Barrel 2209 Wostok Amphibian Diver Wh14Blue Ussr mechanical men's watch Vostok Barrel 2209 Wostok Amphibian Diver Wh14 $89.99 Smith & Wesson Black Mens Amphibian Commando Water Resistant Watch W1100Smith & Wesson Black Mens Amphibian Commando Water Resistant Watch W1100 $48.84
Vostok Komandirskie Russian Diver Amphibian Automatic Wrist Watch RunningVostok Komandirskie Russian Diver Amphibian Automatic Wrist Watch Running $49.99 Vostok Amphibian Russian Military Diver's Automatic Men's Watch 420379Vostok Amphibian Russian Military Diver's Automatic Men's Watch 420379 $99.99
Soviet Military Vostok Amphibian Diver Navy watch Ussr Diver Anti-magnetic Wh15Soviet Military Vostok Amphibian Diver Navy watch Ussr Diver Anti-magnetic Wh15 $89.99 Vostok Komandirskie Russian Diver Amphibian Hand Wind Wrist Watch RunningVostok Komandirskie Russian Diver Amphibian Hand Wind Wrist Watch Running $99.99
Russian Wrist Watch Vostok Wostok Komandirskie . Amphibian 200m . Antimagnetic .Russian Wrist Watch Vostok Wostok Komandirskie . Amphibian 200m . Antimagnetic . $25.00
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Prices current as of last update, 04/03/20 12:01am.

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