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Growth and Development.

Little is known about their growth and development. In the two horned species, Diploceraspis and Diplocaulus, juveniles though have no horns; they develop as they mature (Olson 1950).

Recent studies (Rinehart & Lucas 2001) have demonstrated that the development of the 'long-horn' genus Diplocaulus is not a single continuous process. A two-stage growth pattern has been shown through regression analysis of the available specimens.

Although there is no evidence of an amphibian-type metamorphosis in the Nectrideans,all amphibians, it is possible that their eggs were similar. They would have had no shells and therefore would be laid in the water (or in very damp areas) to stop them drying.

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

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