Synapsida

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The '''Synapsida''' ('fused arch') are an important group of [[amniote]]s that appeared and diversified very early, becoming the dominant life-form on land for the entire Permian period.  Following the [[P-T mass extinction]] they were much reduced in numbers and diversity, and found themselves progressively supplanted by the [[Archosaur]]ian [[reptile]]s.  Synapsids then became more and more mammal-like throughout the Triassic, finally becoming successful as small [[mammal]]s near the end of the period.  They remained under the feet of the dinosaurs until [[K-T mass extinction|another great extinction event]] gave them the opportunity to once again inherit the Earth.  
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The '''Synapsida''' ('fused arch') are an important group of [[amniote]]s that appeared and diversified very early, becoming the dominant life-form on land for the entire Permian period.  Following the [[P-T mass extinction]] they were much reduced in numbers and diversity, and found themselves progressively supplanted by the [[Archosaur]]ian [[reptile]]s.  Synapsids then became more and more mammal-like throughout the Triassic, finally becoming successful as small [[mammal]]s near the end of the period.  They remained under the feet of the dinosaurs until [[wikipedia|wikipedia:K-T mass extinction|another great extinction event]] gave them the opportunity to once again inherit the Earth.  
==Two streams of evolution - Synapsid and Sauropsid==
==Two streams of evolution - Synapsid and Sauropsid==

Revision as of 20:11, 3 December 2009

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