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The Genus Gephyrostegus

Margaret C. Brough and J. Brough
Philosophical Transactions of the Royal Society of London. Series B, Biological Sciences
Vol. 252, No. 776 (Jun. 1, 1967), pp. 147-165
Published by: Royal Society
Stable URL: http://www.jstor.org/stable/2416682
Page Count: 33
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The Genus Gephyrostegus
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Abstract

Gephyrostegus bohemicus Jaekel from the Upper Carboniferous of Nyran is the oldest and most primitive member of the Seymouriamorpha. A new description is given based partly on the described material, but mainly on two hitherto undescribed specimens. These specimens are remarkably complete and make possible a description of the palate, previously unknown, and also a comparative study of the development of the vertebrae. The single specimen, also from Nyran, described by Watson (1926) as Diplovertebron punctatum is made the type of a new species G. watsoni. The position of Gephyrostegus in the Seymouriamorpha is discussed. Its primitive nature is emphasized and a comparison is made with later more specialized forms. The relationship of early tetrapods is considered and a new classification suggested.

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