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Academic & Professional Books  Palaeontology  Palaeozoology & Extinctions

Les Grammoceratinae du Toarcien Supérieur [The Upper Toarcian Grammoceratinae]

By: Louis Rulleau(Author), Pierre Lacroix(Author), Jean-Pierre Le Pichon(Author), François Ové(Author)
294 pages, 64 plates with colour & b/w photos
Publisher: Dedale Editions
Les Grammoceratinae du Toarcien Supérieur [The Upper Toarcian Grammoceratinae]
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  • Les Grammoceratinae du Toarcien Supérieur [The Upper Toarcian Grammoceratinae] ISBN: 9782917151983 Paperback Jul 2020 Usually dispatched within 1-2 weeks
    £54.99
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About this book

Language: French

The ammonite subfamily Grammoceratinae was first studied in-depth by Gabilly (1976), using material from the Toarcian stratotype region, then in a thesis by Rulleau (1989) on the ammonites of the Lyon region. In addition to their purely regional character, this work was either incomplete – Gabilly having considered only part of the genera attached to the subfamily – or unpublished in the case of Rulleau's thesis. In addition, many subsequent works, either in France or abroad, have provided new data on this group of ammonites and their worldwide distribution.

In the northwestern European domain, the main trunk, represented by the genus Pseudogrammoceras and derived from the Phymatoceratinae, continues until the extinction of the phylum, with the genera Phlyseogrammoceras and Hudlestonia. From this line, several lateral branches successively detached: the Grammoceras first, then the Esericeras which give rise to the Pseudolillia and finally the Gruneria. The Podagrosites occupy a special place, which raises the problem of their origin. At the species level, new forms have been described, just as the authors have been able to discuss the probable membership or otherwise of the subfamily of Mediterranean or American species.

Summary in French:
La sous-famille des Grammoceratinae a fait l’objet d’une première étude approfondie de Gabilly (1976), à partir d’un matériel provenant de la région du stratotype du Toarcien, puis d’un travail de thèse par Rulleau (1989) sur les ammonites de la région lyonnaise. Outre leur caractère purement régional, ces travaux étaient soit incomplets, Gabilly n’ayant considéré qu’une partie des genres rattachés à la sous-famille, soit inédits dans le cas de la thèse de Rulleau. Par ailleurs, de nombreux travaux ultérieurs, soit en France, soit à l’étranger, ont apporté de nouvelles données sur ce groupe d’ammonites et sa répartition mondiale.

Dans le domaine NW européen, le tronc principal, représenté par les Pseudogrammoceras et issu des Phymatoceratinae, se poursuit jusqu’à l’extinction du phyllum, par les Phlyseogrammoceras et les Hudlestonia. De cette lignée, vont se détacher successivement plusieurs rameaux latéraux : les Grammoceras d’abord, puis les Esericeras qui donnent naissance aux Pseudolillia et enfin les Gruneria. Les Podagrosites occupent une place à part, ce qui pose le problème de leur origine. Au niveau des espèces, des formes nouvelles ont pu être décrites, de même que l’on a pu discuter de l’appartenance vraisemblable ou non à la sous-famille, d’espèces méditerranéennes ou américaines.

Customer Reviews

By: Louis Rulleau(Author), Pierre Lacroix(Author), Jean-Pierre Le Pichon(Author), François Ové(Author)
294 pages, 64 plates with colour & b/w photos
Publisher: Dedale Editions
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