Ammonoids (Mollusca, Cephalopoda): Recent advances and contributions to evolutionary paleobiology

Abstract

Ammonoids ruled the seas for 335 Myr and present themselves as an especially suitable model when analyzing biological evolution. This synthetic paper focuses on (1): the phylogenetic place of ammonoids within cephalopods and the choice of an extant reference model; (2): the establishment of phenotypic spaces supplying relevant insights into biological evolution; (3): the concordances and discordances between phylogenetic reconstructions and the fossil record, and (4): the postcrisis recoveries, as models to study large-scale evolution. It appears from these topics that ammonoids can be used as case studies for many themes in Paleontology (biodiversity dynamics, phylogenetics, analysis of the fossil record) that offered and continues to offer a better understanding of evolutionary patterns and processes, especially in the context of large-scale studies. ?? 2008 Acad??mie des sciences.