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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 $66.47 Compass / Pvd Coated Steel Bezel Vostok Amphibian Komandirskie Watch / LimitedCompass / Pvd Coated Steel Bezel Vostok Amphibian Komandirskie Watch / Limited $50.00
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12Hr/60M Insert Knurled Edge Steel Bezel for Vostok Amphibian Komandirskie Watch12Hr/60M Insert Knurled Edge Steel Bezel for Vostok Amphibian Komandirskie Watch $30.95 New listing
		Russian Wrist Watch Vostok Wostok Commander . Amphibian 200m . 18 Jewels .New listing Russian Wrist Watch Vostok Wostok Commander . Amphibian 200m . 18 Jewels . $23.00
Vostok Amphibian Classic Russian Military Automatic Men's Watch 420289Vostok Amphibian Classic Russian Military Automatic Men's Watch 420289 $79.99 Blue/Black Brushed Stainless Steel Bezel for Vostok Amphibian Komandirskie WatchBlue/Black Brushed Stainless Steel Bezel for Vostok Amphibian Komandirskie Watch $50.00
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Soviet Military Vostok Amphibian Diver mens watch Russian Flag Double eagle Am05Soviet Military Vostok Amphibian Diver mens watch Russian Flag Double eagle Am05 $62.99 Was:  Previous Price $69.99 Vintage Russian Vostok Amphibian Albatross Diver Watch *Us Seller* #1522Vintage Russian Vostok Amphibian Albatross Diver Watch *Us Seller* #1522 $99.00
Dash Style Polished Steel Bezel Vostok Amphibian Komandirskie Watch / LimitedDash Style Polished Steel Bezel Vostok Amphibian Komandirskie Watch / Limited $50.00 Authentic Soviet Men's Wrist Watch Vostok Amphibian Амфибия Восток UssrAuthentic Soviet Men's Wrist Watch Vostok Amphibian Амфибия Восток Ussr $85.50 Was:  Previous Price $95.00
*Us Seller* Soviet Diver Watch, Amphibian, Antimagnetic Vostok 70s 2214 #1242*Us Seller* Soviet Diver Watch, Amphibian, Antimagnetic Vostok 70s 2214 #1242 $89.00 Military Soviet mechanical mens watch Vostok Amphibian Ussr Diver Albatross Am06Military Soviet mechanical mens watch Vostok Amphibian Ussr Diver Albatross Am06 $71.99 Was:  Previous Price $79.99
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Smith & Wesson Amphibian Commando Black Glowing Dial Watch Rubber Strap 46mmSmith & Wesson Amphibian Commando Black Glowing Dial Watch Rubber Strap 46mm $63.00 Vostok Amphibian Komandirskie Custom Bezel 60Min/12Hr Combo Matte Us1260MtVostok Amphibian Komandirskie Custom Bezel 60Min/12Hr Combo Matte Us1260Mt $50.00
New listing
		Russia Amphibian Automatic Shock Resistant Men's Vintage Watch Running!New listing Russia Amphibian Automatic Shock Resistant Men's Vintage Watch Running! $52.00 Vostok Komandirskie Russian Diver Amphibian Automatic Wrist Watch RunningVostok Komandirskie Russian Diver Amphibian Automatic Wrist Watch Running $49.99
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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 Vostok Amphibian Komandirskie Custom Bezel 60Min/12Hr Combo Black Pvd Us1260BlkpVostok Amphibian Komandirskie Custom Bezel 60Min/12Hr Combo Black Pvd Us1260Blkp $27.95
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Compass Style Insert Custom Steel Bezel for Vostok Amphibian Komandirskie WatchCompass Style Insert Custom Steel Bezel for Vostok Amphibian Komandirskie Watch $50.00 Vostok Amphibian Komandirskie Custom Bezel 60Min/12Hr Combo Polished Us1260PolVostok Amphibian Komandirskie Custom Bezel 60Min/12Hr Combo Polished Us1260Pol $50.00
Compass Insert Knurled Edge Steel Bezel for Vostok Amphibian Komandirskie WatchCompass Insert Knurled Edge Steel Bezel for Vostok Amphibian Komandirskie Watch $26.95
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Prices current as of last update, 10/16/19 2:21pm.

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