genes in several neotenic amphibians: the obligatory neotenic members of the family Proteidea ... anuran tadpoles into adult frogs have long intrigued bi- ...
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www.springerlink.com/index/DLYR55Y5U7K1UCFY.pdf
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Some frogs in transitory ponds have fast and slow larvae. The fast ones eat the slow ones! 2 - Spread. If some disaster takes all the early ones, there are still some left. 3 - Parasitism. I'm sure ancient beasts like frogs must have parasites.
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www.wildaboutbritain.co.uk/forums/reptile-and-amphibian...
www.wildaboutbritain.co.uk/forums/reptile-and-amphibian-forums/4472-slow-frogs.html
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Because it's a salamander, it's part of one of the three branches of class Amphibia, which also includes the frogs and toads (the Anurans), and the mainly eel-like order, Gymnophiona, which are also known as the Caecilians. ... It is generally accepted that neoteny is a "backward" step in evolution, because the Axolotl...
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The Wildlife Garden - The Common Frog - Rana temporaria ... Some tadpoles never leave the pond - they continue to grow into larger tadpoles! This is called 'neoteny'. Frogs can breathe through their skin - very useful if you hibernate under water!
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www.thewildlifegarden.co.uk/wildlife_gardening/animals/...
www.thewildlifegarden.co.uk/wildlife_gardening/animals/amphibians/frogs.htm
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Certain species of amphibians, particularly among the salamanders, remain in larval form all their lives. This phenomenon is called neoteny. ... They look much more like fishes than like frogs or toads. The gymnophion larvae are limbless and slender and have distinctive gills.
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www.lookd.com/frogs/life.html
www.lookd.com/frogs/life.html
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What you need to know about frogs ... The most commonly known amphibians are frogs, toads, and salamanders. Although most have changed very little since they first began to breathe on land, some of the early amphibians were the ancestors of today's reptiles, birds, and mammals.
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www.lookd.com/frogs/index.html
www.lookd.com/frogs/index.html
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Ambystoma mexicanum-Mexican axolotl (amphibian). A salamander that shows neoteny. The adult may retain the larval form, but can reproduce. The neotenous, aquatic axolotl will metamorphose into ... subcortical rotation; Return to Saggital Section or Rotation- Spray Painting or Deep Cytoplasm or Germ Plasm or Frogs in Space...
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worms.zoology.wisc.edu/frogs/glossary.html
worms.zoology.wisc.edu/frogs/glossary.html
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A collection of interesting pictures of salamanders found in South Carolina. ... Carolina Spring Salamander ... Gyrinophilus porphyriticus dunni...
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www.snakesandfrogs.com/scra/salamanders/scsally.htm
www.snakesandfrogs.com/scra/salamanders/scsally.htm
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Tet Zoo regulars will know that I've had a thing about anurans (frogs and toads) recently (go here, here or here); the reasons for this will become clear soon enough. ... Internal fertilization has evolved in the North American tailed frogs (hey, that ain't no tail baby), in some African bufonids (Nectophrynoides and...
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scienceblogs.com/tetrapodzoology/2007/10/frogs_toads_sh...
scienceblogs.com/tetrapodzoology/2007/10/frogs_toads_sheer_untold_awesomeness.php
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