Special Papers in Palaeontology: Nautiloids Before and During the Origin of Ammonoids in a Siluro-devonian Section in the Tafilalt, Anti-atlas, Morocco

* A study of the stratigraphical occurrences of non-ammonoid cephalopods in the Late-Silurian-Middle Devonian * More than 2000 cephalopod specimens were collected from a section in the Tafilalt of south-east Morocco for the study * For the first time, non-ammonoid cephalopod occurrences were recorded against a precisely controlled stratigraphical record in post-Lochkovian Devonian sediments * Includes 16 plates and 23 text-figures