Special Papers in Palaeontology, Nautiloids before and during the origin of ammonoids in a Siluro-Devonian section in the Tafilalt, Anti-Atlas, Morocc [Paperback]

• 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.

Introduction.

Terminology.

Open nomenclature.

Terminology of higher taxa.

Morphological terms.

Diversity Measures.

The Locality.

Sedimentary Succession and Stratigraphy.

1. Temperoceras limestone succession.

2. Scyphocrinites limestone succession.

3. Jovellania limestone succession.

4. Pragian-Zl1?chovian limestone succession.

5. Early Eifelian limestone succession.

Interpretation of the Sedimentary Succession.

General remarks.

Description of depositional cycles.

Cephalopod Succession.

Diversity signal.

Morphological signal.

Evolutionary signal.

Systematic Palaeontology.

Class Cepalopoda Cuvier, 1797.

Order Discosorida Flower, in Flower and Kummel 1950.

Family Phragmoceratidae Miller, 1877.

Genus Pseudendoplectoceras gen. nov.

Order Oncocerida Flower, in Flower and Kummel 1950.

Family Brevicoceratidae Flower, 1945.

Genus Brevicoceras Flower, 1938.

Genus Cerovoceras gen. nov.

Famillc^