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Academic & Professional Books  Palaeontology  Palaeozoology & Extinctions

Les Dactylioceratidae du Toarcien Inférieur et Moyen: Une Famille Cosmopolite [The Dactylioceratidae of the Lower and Middle Toarcian: A Cosmopolitan Family]

By: Louis Rulleau(Author), Pierre Lacroix(Author), Marc Bécaud(Author), Jean-Pierre Le Pichon(Author)
245 pages, 46 plates with b/w photos and b/w illustrations; 44 colour & b/w photos and b/w illustrations
Publisher: Dedale Editions
Les Dactylioceratidae du Toarcien Inférieur et Moyen: Une Famille Cosmopolite [The Dactylioceratidae of the Lower and Middle Toarcian: A Cosmopolitan Family]
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  • Les Dactylioceratidae du Toarcien Inférieur et Moyen: Une Famille Cosmopolite [The Dactylioceratidae of the Lower and Middle Toarcian: A Cosmopolitan Family] ISBN: 9782917151501 Paperback Jan 2013 Usually dispatched within 1-2 weeks
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Les Dactylioceratidae du Toarcien Inférieur et Moyen: Une Famille Cosmopolite [The Dactylioceratidae of the Lower and Middle Toarcian: A Cosmopolitan Family]Les Dactylioceratidae du Toarcien Inférieur et Moyen: Une Famille Cosmopolite [The Dactylioceratidae of the Lower and Middle Toarcian: A Cosmopolitan Family]

About this book

Language: French with bilingual summary in English and French

A large number of studies have been dedicated in whole or in part to Dactylioceratidae and reflect the divergent and often contradictory opinions of their authors on this complex family. None of these studies had so far made a synthesis of knowledge on the fauna of the different palaeogeographic domains.

The study of this family focused on the Toarcian fauna that constitutes the Dactylioceratinae subfamily. A very large number of genera and species have been described since the early 19th century, and the authors had to choose among them those who deserved to be validated. They relied on it for three kinds of arguments: morphological of course, but also stratigraphic and paleogeographic. They were therefore able to select 170 species belonging to 22 genera (or subgenera), all described and illustrated in this book.

This work of synthesis allowed the authors to highlight the almost total segregation between the forms of the NW European and Mediterranean provinces. It also allowed them to reconsider the question of the presence of rare Mediterranean forms in Southem France, and invited to consider the complex question of the phylogeny of this group.

This book addresses the collectors of fossils who will find the elements of determination of their specimens there, but also the scientists because of the great biostratigraphic interest of this group, the species of which have often been used as indicators of zones, sub-zones or horizons in the different palaeogeographic domains.

Summary in French:
De nombreux travaux ont été consacrés, entièrement ou en partie, aux Dactylioceratidae et traduisent les opinions divergentes et souvent contradictoires de leurs auteurs sur cette famille complexe. Aucun de ces travaux n'avait jusqu'à présent effectué une synthèse des connaissances sur les faunes des différents domaines paléogéographiques.

Notre étude, au sein de cette famille buissonnante, a porté sur les faunes toarciennes qui constituent la sous-famille des Dactylioceratinae. Un très grand nombre de genres et d'espèces ont été décrits depuis le début du dix-neuvième siècle et il nous a fallu choisir parmi eux ceux qui méritaient d'être validés. Nous nous sommes appuyés pour cela sur trois sortes d'arguments : morphologiques bien sûr, mais auusi stratigraphiques et paléogéographiques. Nous avons ainsi pu sélectionner 170 espèces appartenant à 22 genres (ou sous-genres), tous décrits et figurés dans l'ouvrage.

Ce travail de synthèse nous a permis de bien mettre en relief la ségrégation quasi-totale existant entre les formes des provinces NW européenne et méditerranéenne. Il nous a également permis de reconsidérer la question de la présence de rares formes méditerranéennes dans les Causses et invité à considérer la question complexe de la phylogenèse de ce groupe.

Ce travail s'adresse aux collectionneurs de fossiles qui y trouveront les éléments de détermination de leurs spécimens, mais aussi aux scientifiques du fait du grand intérêt biostratigraphique de ce groupe, dont les espèces ont souvent été utilisées comme indices de zones, sous-zones ou horizons dans les différents domaines paléogéographiques.

Customer Reviews

By: Louis Rulleau(Author), Pierre Lacroix(Author), Marc Bécaud(Author), Jean-Pierre Le Pichon(Author)
245 pages, 46 plates with b/w photos and b/w illustrations; 44 colour & b/w photos and b/w illustrations
Publisher: Dedale Editions
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