Nautiloids Before and During the Origin of Ammonoids in a Siluro-Devonian Section in the Tafilalt, Anti-atlas, Morocco

About this book

This is 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.

Contents

Abstract
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-Zlı´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
Family Jovellaniidae Foord, 1888
Genus Jovellania Bayle, in Bayle and Zeller 1878
Genus Bohemojovellania Manda, 2001
Family Karoceratidae Teichert, 1939
Genus Ankyloceras Zhuravleva, 1974
Genus Ventrobalashovia gen. nov
Family Nothoceratidae Fischer, 1882
Genus Mutoblakeoceras gen. nov
Genus Tafilaltoceras gen. nov
Indet. Nothoceratidae
Family Oncoceratidae Hyatt, 1884
Genus Orthorizoceras gen. nov
Order Nautilida Agassiz, 1847
Family Centroceratidae Hyatt, 1900
Genus Centroceras Hyatt, 1884
Order Actinocerida Teichert, 1933
Family Ormoceratidae Saemann, 1852
Genus Ormoceras Stokes, 1840
Genus Deiroceras Hyatt, 1884
Genus Metarmenoceras Flower, 1940
Order Pseudothocerida Barskov, 1963
Family Pseudorthoceratidae Flower and Caster, 1935
Genus Geidoloceras gen. nov
Genus Neocycloceras Flower and Caster, 1935
Genus Probatoceras Zhuravleva, 1978
Genus Subdoloceras gen. nov
Genus Subormoceras gen. nov
Family Spyroceratidae Shimizu and Obata, 1935a
Genus Spyroceras Hyatt, 1884
Genus Cancellspyroceras gen. nov
Genus Diagoceras Flower, 1936
Genus Suloceras Manda, 2001
Order Lituitida Starobogatov, 1974
Family Lamellorthoceratidae Teichert, 1961
Genus Arthrophyllum Beyrich, 1850
Family Sphooceratidae Flower, 1962
Genus Sphooceras Flower, 1962
Order Orthoceratida Kuhn, 1940
Family Orthoceratidae McCoy, 1844
Genus Chebbioceras Klug et al., 2008
Genus Infundibuloceras Klug et al., 2008
Genus Kopaninoceras Kiselev, 1969
Genus Merocycloceras Ristedt, 1968
Genus Michelinoceras Foerste, 1932
Genus Orthocycloceras Barskov, 1972
Genus Pseudospyroceras gen. nov
Genus Theoceras gen. nov
Genus Tibichoanoceras gen. nov
Orthoceratidae gen. et sp. indet
Family Arionoceratidae Dzik, 1984
Genus Arionoceras Barskov, 1966
Genus Adiagoceras gen. nov
Genus Parakionoceras Foerste, 1928
Family Dawsonoceratidae Flower, 1962
Genus Anaspyroceras Shimizu and Obata, 1935a
Indet. Dawsonoceratidae
Family Geisonoceratidae Zhuravleva, 1959
Genus Angeisonoceras gen. nov
Genus Temperoceras Barskov, 1960
Family Kionoceratidae Hyatt, 1900
Genus Kionoceras Hyatt, 1884
Family Sichuanoceratidae Zhuravleva, 1978
Genus Sichuanoceras Chang, 1962
Family Sphaerorthoceratidae Ristedt, 1968
Genus Sphaerorthoceras Ristedt, 1968
Genus Akrosphaerorthoceras Ristedt, 1968
Genus Hemicosmorthoceras Ristedt, 1968
Genus Parasphaerorthoceras Ristedt, 1968
Genus Plagiostomoceras Teichert and Glenister, 1952
Order Bactritida Shimansky, 1951
Family Bactritidae Hyatt, 1884
Genus Bactrites Sandberger, 1843
Genus Devonobactrites Shimansky, 1962
Genus Lobobactrites Schindewolf, 1932

List of New Combinations
Conclusions
Acknowledgements
References
Appendix

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