2 Material and Methods
The taxa used in this study are Archanarcestes obesus Erben, 1960 and Mimagoniatites fecundus Barrande, 1865, from the Mimagoniatitidae Agoniatites vanuxemi Hall, 1879 and Fidelites fidelis Barrande, 1865, from the Agoniatitidae and Latanarcestes sp. from the Anarcestidae. Six of the specimens are from Morocco. The remaining specimen A. vanuxemi is from the Cherry Valley Limestone of New York State see Clarke, 1899 . Descriptions of Moroccan localities are given below. For a more detailed...
Appendix 7
Lirae spacing in microns on the postembryonic shell of Latanarcestes sp. AMNH 46646 ._ number Ventral V Midflank Dorsal D Ratio V D number Ventral V Midflank Dorsal D Ratio V D
References 1
Arnold, J. M., N. H. Landman, and H. Mutvei. 1987. Development of the embryonic shell of Nautilus. In W. B. Saunders, and N. H. Landman editors , Nautilus - the Biology and Paleobiology of a Living Fossil, pp. 373-400. New York Plenum Press. Bandel, K. 1982. Morphologie und Bildung der fr h ontogenetischen Geh use bei conchiferen Mollusken. Facies 7 1-198. Bandel, K. 1986. The ammonitella a model of formation with the aid of the embryonic shell of archaeogastropods. Lethaia 19 171-180....
on Paleozoic Ammonoids
Institut f r Geowissenschaften, Universit t T bingen, Sigwartstrasse 10, D-72076 T bingen, Germany, juergen.kullmann uni-tuebingen.de 2 Scope of the Database System 3 Data 3.1 Taxonomy Including 3.4 Geographic 5 Problems and 6 Future References Keywords GONIAT, database, Devonian, Carboniferous, Permian, Paleozoic ammonoids, mediator architecture
31 External Features of the Ammonitella
Ornament for all taxa consists of transverse lirae that cover the entire ammonitella except for a bald spot at the apex Klofak et al., 1999 . Wrinkle-like creases stretch between the lirae and are best defined on the initial chamber. These wrinklelike creases are most strongly expressed in the Mimagoniatitidae Figs. 2.1b, 2.2e , less strongly expressed in the Anarcestidae Fig. 2.3b , and least strongly expressed in the Agoniatitidae Fig. 2.1f . The lirae are a relief feature and are not...
Appendix Bibliographic list of articles using the cladistic method included in
Note that this is not an exhaustive list of the cladistic approach applied to fossil cephalopods, but the list resulting from our sample of paleontological literature see text . studies based on Bandel, K., and S. v. Boletzky. 1988. Features of development and functional morphology required in the reconstruction of early coleoid cephalopods. In J. Wiedmann, and J. Kullmann editors , Proceedings of the 2nd International Cephalopod Symposium, Cephalopods - Present and Past, pp. 229-246. Stuttgart...
1 Introduction 1
The basic structure of the ammonitella or embryonic shell of the Ammonoidea has been well documented Sandberger, 1851 Branco, 1879-1880, 1880-1881 Schindewolf, 1933 Erben, 1960 . The ammonitella begins with a small egg-shaped or spherical initial chamber protoconch for discussion of terms see Schindewolf, 1933 House, 1996 and Landman et al., 1996 see Landman et al., 1996 for additional references and extends as a straight shaft or coiled tube called the ammonitella coil by House, 1996 168 . In...