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Kernwoorden aanpassing amfibie

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Kernwoorden aanpassing amfibie



Pagina10/11
Datum10.05.2018
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Acanthostega had a tail like a fish and gills for breathing in water. But it had the legs and feet of a land animal. The worlds first reptiles appeared around 300 million years ago. These animals evolved from an older group named amphibians. The word amphibian means double life and describes those that live on land and water.

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http://www.earthhistory.org.uk/recolonisation/first-amphibians



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http://tolweb.org/Acanthostega



Reconstruction by Richard Hammond //Acanthostega gunnari //

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http://palaeos.com/vertebrates/tetrapoda/overview2.html



http://palaeos.com/vertebrates/tetrapoda/acanthostega.html

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http://www.evolutionpages.com/pederpes%20finneyae.htm



Reconstruction of pedes of various taxa. Pederpes, Greererpeton, Silvanerpeton and Proterogyrinus  show asymmetrical metatarsals (see arrows) compared with those of the Devonian forms Acanthostega,  Ichthyostega and Tulerpeton. In Acanthostega and Ichthyostega, the metatarsals are not clearly  differentiated, and in Tulerpeton, if correctly interpreted, they are cylindrical but include some  interarticulations. Scale bars, 10 mm. After reference (2)



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http://www.decomputermeester.nl/Pagina's%20overig/Uitgestorven/Inhoud/Phanerozo%C3%AFcum/Paleozo%C3%AFcum/Devoon/Fauna/Amphibie%C3%ABn/devoon_amphibie%C3%ABn.htm



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PBS



http://www.nicerweb.com/sketches/video/PBS-Evolution/2.2_change/

acanthostega forelimb witk fingers

NOVA


http://www.pbs.org/wgbh/nova/evolution/diva-devonian.html

Not five but eight fingers on each "hand" emerged from the rock encasing the remains of Acanthostega. Photo credit: WGBH/NOVA and BBC/Horizon



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http://www.lucyonline.nl/vissen_komen_aan_land/vissen_komen_aan_land.htm



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