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Article: The aptychi of Sonninia (Ammonitina) from the Bajocian of Scotland

Publication: Palaeontology
Volume: 16
Part: 1
Publication Date: January 1973
Page(s): 195 203
Author(s): N. Morton
Addition Information

How to Cite

MORTON, N. 1973. The aptychi of Sonninia (Ammonitina) from the Bajocian of Scotland. Palaeontology16, 1, 195–203.

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The Palaeontological Association (Free Access)


Aptychi found in the body chambers of four specimens of Sonninia (Papilliceras) from Skye, western Scotland, are described and figured. The aptychi do not exactly fit the aperture but it was not possible to establish conclusively whether they functioned as opercula or as part of the jaw apparatus.
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