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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 Mens Amphibian Commando 30 m Water Resistant WatchSmith & Wesson Mens Amphibian Commando 30 m Water Resistant Watch $47.10 Was:  Previous Price $50.11 Vostok Komandirskie Russian Diver Amphibian Automatic Wrist Watch RunningVostok Komandirskie Russian Diver Amphibian Automatic Wrist Watch Running $49.99
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60M Blu/Blk+Red Matte Bezel for Vostok Amphibian Komandirskie Watch 3860Brmt60M Blu/Blk+Red Matte Bezel for Vostok Amphibian Komandirskie Watch 3860Brmt $35.95 Silver/Pale Green Vostok Amphibian Komandirskie Custom Paddle Watch HandsSilver/Pale Green Vostok Amphibian Komandirskie Custom Paddle Watch Hands $20.99
Men's Wristwatch Russian Amphibian Kgb 200M Buffalo Head Nickel BandMen's Wristwatch Russian Amphibian Kgb 200M Buffalo Head Nickel Band $95.90 Was:  Previous Price $122.95 Smith & Wesson Men's Amphibian Commando Watch. Black stainless casing. Black facSmith & Wesson Men's Amphibian Commando Watch. Black stainless casing. Black fac $46.10 Was:  Previous Price $51.80
Soviet Military Vostok Amphibian Diver diver's watch Ussr Diver Anti-magneticSoviet Military Vostok Amphibian Diver diver's watch Ussr Diver Anti-magnetic $80.99 Was:  Previous Price $89.99 Vostok Komandirskie Russian Diver Amphibian Hand Wind Wrist Watch RunningVostok Komandirskie Russian Diver Amphibian Hand Wind Wrist Watch Running $99.99
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Vostok Amphibian Komandirskie Custom Bezel Blk-Gold/Copper Dash Polished UgblkpoVostok Amphibian Komandirskie Custom Bezel Blk-Gold/Copper Dash Polished Ugblkpo $36.95 Spring Wire Lock For Vostok Amphibian Komandirskie Watch BezelsSpring Wire Lock For Vostok Amphibian Komandirskie Watch Bezels $3.95
Vostok Amphibian Military Russian Wrist Watch for MenVostok Amphibian Military Russian Wrist Watch for Men $10.00 Vintage Russian Diver Watch Navy Military Watch Vostok AmphibianVintage Russian Diver Watch Navy Military Watch Vostok Amphibian $99.00
Compass Insert Knurled Edge Steel Bezel for Vostok Amphibian Komandirskie WatchCompass Insert Knurled Edge Steel Bezel for Vostok Amphibian Komandirskie Watch $39.95 Vintage Russian Vostok Amphibian WatchVintage Russian Vostok Amphibian Watch $29.99
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		Vostok Amphibian automatic watchNew listing Vostok Amphibian automatic watch $100.00 Wwii Era Parker Watch Co. Amphibian Wristwatch Watch WorkingWwii Era Parker Watch Co. Amphibian Wristwatch Watch Working $45.00
Watch "Vostok." Amphibian. Made in the UssrWatch "Vostok." Amphibian. Made in the Ussr $14.00 Vostok Amphibian Komandirskie Custom Bezel 60Min Black/Blue Polished Ublu60PolVostok Amphibian Komandirskie Custom Bezel 60Min Black/Blue Polished Ublu60Pol $50.00
Silver/White Vostok Amphibian Komandirskie Custom Paddle Watch HandsSilver/White Vostok Amphibian Komandirskie Custom Paddle Watch Hands $29.99 60Min Reduced Diameter Blue Pvd Lumed Bezel Vostok Amphibian Komandirskie 38Blup60Min Reduced Diameter Blue Pvd Lumed Bezel Vostok Amphibian Komandirskie 38Blup $27.95
60Min Reduced Diameter Brushed Lumed Bezel Vostok Amphibian Komandirskie 38Pbg60Min Reduced Diameter Brushed Lumed Bezel Vostok Amphibian Komandirskie 38Pbg Vostok Oficerskie Wwii 40th Anniversary Amphibian 3Aka3 Cccp Soviet Dive WatchVostok Oficerskie Wwii 40th Anniversary Amphibian 3Aka3 Cccp Soviet Dive Watch $75.00
New listing
		Vostok Amphibian Scuba Dude Rubber Bracelet Watch. For RepairNew listing Vostok Amphibian Scuba Dude Rubber Bracelet Watch. For Repair $10.00 Vostok Amphibian Komandirskie Custom Bezel Blk-Gold/Copper Dash Matte UgblkmtVostok Amphibian Komandirskie Custom Bezel Blk-Gold/Copper Dash Matte Ugblkmt $39.95
Compass Style Insert Custom Steel Bezel for Vostok Amphibian Komandirskie WatchCompass Style Insert Custom Steel Bezel for Vostok Amphibian Komandirskie Watch $50.00 White/Blue Vostok Amphibian Komandirskie Custom Watch Hands "Telum" Ph2BlwWhite/Blue Vostok Amphibian Komandirskie Custom Watch Hands "Telum" Ph2Blw $20.99
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Vostok Amphibian Komandirskie Custom B
00004000
Ezel Blk-Gold/Copper Black Pvd UgblkpvdVostok Amphibian Komandirskie Custom B 00004000 Ezel Blk-Gold/Copper Black Pvd Ugblkpvd $39.95 Diver Watch Strap Band 22Mm Silicone Rubber Orange Custom Fit Vostok AmphibianDiver Watch Strap Band 22Mm Silicone Rubber Orange Custom Fit Vostok Amphibian $22.95
Smith & Wesson Sww-1100 Black Stainless Men's Amphibian Commando Watch (148)Smith & Wesson Sww-1100 Black Stainless Men's Amphibian Commando Watch (148) $38.00 12Hr/60M Insert Knurled Edge Steel Bezel for Vostok Amphibian Komandirskie Watch12Hr/60M Insert Knurled Edge Steel Bezel for Vostok Amphibian Komandirskie Watch $39.95
Amphibian Commando WatchAmphibian Commando Watch $63.00 Authentic Vostok Russian Vostok Auto Amphibian (#420331) Military Diver WristAuthentic Vostok Russian Vostok Auto Amphibian (#420331) Military Diver Wrist $69.99
Diver Watch Strap Band 22Mm Silicone Rubber Black Vostok Amphibian Custom FitDiver Watch Strap Band 22Mm Silicone Rubber Black Vostok Amphibian Custom Fit $22.95 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 $66.47
Smith & Wesson Sww-1100 Black Stainless Men's Amphibian Commando WatchSmith & Wesson Sww-1100 Black Stainless Men's Amphibian Commando Watch $46.09 List price:  Previous Price $60.38 *Us Seller* Soviet Vostok WindUp Watch, Amphibian, Antimagnetic 1980s #1034*Us Seller* Soviet Vostok WindUp Watch, Amphibian, Antimagnetic 1980s #1034 $69.00
Vostok Watch Amphibian Man Russian Military Amphibia Automatic DiverVostok Watch Amphibian Man Russian Military Amphibia Automatic Diver $54.00 Russian Military Vostok Amphibian Tank diver watch Automatic Ussr red Star CccpRussian Military Vostok Amphibian Tank diver watch Automatic Ussr red Star Cccp $62.99 Was:  Previous Price $69.99
Russian Military Vostok Amphibian Vdv Airborne diver watch Automatic Diving Am03Russian Military Vostok Amphibian Vdv Airborne diver watch Automatic Diving Am03 $55.99 Was:  Previous Price $69.99 Amphibian Commando Watch 3Atm Japanese Movement Date Display Stainless SteelAmphibian Commando Watch 3Atm Japanese Movement Date Display Stainless Steel $61.85
Watch "Vostok" amphibian. Automatic winding. Workers. Made in the UssrWatch "Vostok" amphibian. Automatic winding. Workers. Made in the Ussr $28.00 Dash Style Polished Steel Bezel Vostok Amphibian Komandirskie Watch / LimitedDash Style Polished Steel Bezel Vostok Amphibian Komandirskie Watch / Limited $50.00
12 Hour Insert 38Mm Polished Bezel Vostok Amphibian Komandirskie 3812Inspol12 Hour Insert 38Mm Polished Bezel Vostok Amphibian Komandirskie 3812Inspol $21.95 Red /Black Vostok Amphibian Komandirskie Custom Watch Hands "Telum" Ph2RbkRed /Black Vostok Amphibian Komandirskie Custom Watch Hands "Telum" Ph2Rbk $20.99
Soviet Vintage Vostok Amphibian Mechanical Watch Diver Steel Case Ussr RareSoviet Vintage Vostok Amphibian Mechanical Watch Diver Steel Case Ussr Rare $55.00 60Min Insert 38Mm Gold Pvd Bezel Vostok Amphibian Komandirskie 3860Insgld60Min Insert 38Mm Gold Pvd Bezel Vostok Amphibian Komandirskie 3860Insgld $21.95
Rare Vintage Vostok Amphibian Diver WatchRare Vintage Vostok Amphibian Diver Watch $24.95 Blue/Black Brushed Stainless Steel Bezel for Vostok Amphibian Komandirskie WatchBlue/Black Brushed Stainless Steel Bezel for Vostok Amphibian Komandirskie Watch $50.00
Made in Russia Amphibian Automatic Shock Resistant Men's Vintage WatchMade in Russia Amphibian Automatic Shock Resistant Men's Vintage Watch $71.97 Was:  00004000 Previous Price $119.95 Vostok Amphibian Russian Military Diver's Mechanical Men's Watch 420945Vostok Amphibian Russian Military Diver's Mechanical Men's Watch 420945 $84.99 Was:  Previous Price $99.99
Vintage Russian Vostok Amphibian Albatross Diver Watch Ussr *Us Seller* #1522Vintage Russian Vostok Amphibian Albatross Diver Watch Ussr *Us Seller* #1522 $99.00
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Prices current as of last update, 01/26/20 11:35pm.

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