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

Volume / Part: 16 / 1
Publication Date: January 1973
Page(s): 195 - 203
Authored By: N. Morton

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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.

Palaeontology - Volume 16 Part 1 Pages 195-203

Palaeontology - Volume 16 Part 1 Pages 195-203

Citations

MORTON, N. 1973. The aptychi of Sonninia (Ammonitina) from the Bajocian of Scotland. Palaeontology, 16, 1, 195–203.