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Modern Forms.

No direct modern forms of the Nectrideans survive today, in fact only three forms of amphibian are seen today: frogs, salamanders and caecilians.

The Nectridean order does though have a place in one of the theories in to the origins of the three modern orders.

The first hypothesis of modern amphibian origins have them all arising from a group of Carboniferous-Permian amphibians called the Temnospondyls. This is the most widely accepted view and is held by the majority of researchers of modern amphibian origins (see Milner 1988).

The second hypothesis has modern amphibians originating from the Lepospondyls, the larger group to which Nectrideans belong. Also within this larger group is the order Lysorophids, and it is from this group that the origin may have occurred (Vallin & Laurin 2004). 

Hypothesis two

Figure 10. Hypothesis two. Showing the modern amphibians originating from the Lepospondyls. After Lee & Anderson 2006.

Back to the Nectridean index.
Major Subgroups of the Nectrideans.
Anatomy and Behaviour.
Fossil Record.
Literature and Web Links.

Author: Iain McIntyre
Last updated: 19/11/2006
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