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View article: The impact of the Pliensbachian–Toarcian crisis on belemnite assemblages and size distribution
The impact of the Pliensbachian–Toarcian crisis on belemnite assemblages and size distribution Open
The second-order Pliensbachian–Toarcian crisis affected major groups of marine organisms. While its impact has been intensively studied for ammonites, the response of belemnites is only currently emerging through quantitative studies. Nove…
View article: Ups and downs of belemnite diversity in the Early Jurassic of Western Tethys
Ups and downs of belemnite diversity in the Early Jurassic of Western Tethys Open
Although belemnites form a major clade of extinct cephalopods, the early stage of their diversification remains poorly known in time and space. Here we investigate the first diversification episodes of belemnites (order Belemnitida) using …
View article: A Nature’s Curiosity: The Argonaut “Shell” and Its Organic Content
A Nature’s Curiosity: The Argonaut “Shell” and Its Organic Content Open
Molluscs are known for their ability to produce a calcified shell resulting from a genetically controlled and matrix-mediated process, performed extracellularly. The occluded organic matrix consists of a complex mixture of proteins, glycop…
View article: The impact of the Pliensbachian-Toarcian crisis on belemnite diversity and size distribution
The impact of the Pliensbachian-Toarcian crisis on belemnite diversity and size distribution Open
<p>The Pliensbachian&#8211;Toarcian transition has been considered a major bottleneck in the early evolution of belemnites, probably related to major palaeoenvironmental and climatic changes during the Early Toarcian. Previous re…
View article: Biogeographic patterns of belemnite body size responses to episodes of environmental crisis
Biogeographic patterns of belemnite body size responses to episodes of environmental crisis Open
Body size changes have been investigated through episodes of environmental crisis among several groups of organisms but the relative contribution of within-lineage size changes, selective extinction and origination of taxa on these pattern…
View article: Biogeographic patterns of belemnite body size responses to episodes of environmental crisis
Biogeographic patterns of belemnite body size responses to episodes of environmental crisis Open
Body size changes have been investigated through episodes of environmental crisis among several groups of organisms but the relative contribution of within-lineage size changes, selective extinction and origination of taxa on these pattern…
View article: Functional integration for enrolment constrains evolutionary variation of phacopid trilobites despite developmental modularity
Functional integration for enrolment constrains evolutionary variation of phacopid trilobites despite developmental modularity Open
Modularity and integration are variational properties expressed at various levels of the biological hierarchy. Mismatches among these levels, for example developmental modules that are integrated in a functional unit, could be informative …
View article: Phylogeny of some Devonian trilobites and consequences for the systematics of<i>Austerops</i>(Phacopidae)
Phylogeny of some Devonian trilobites and consequences for the systematics of<i>Austerops</i>(Phacopidae) Open
16 pages
View article: Correction: Diversification rates indicate an early role of adaptive radiations at the origin of modern echinoid fauna
Correction: Diversification rates indicate an early role of adaptive radiations at the origin of modern echinoid fauna Open
[This corrects the article DOI: 10.1371/journal.pone.0194575.].
View article: Diversification rates indicate an early role of adaptive radiations at the origin of modern echinoid fauna
Diversification rates indicate an early role of adaptive radiations at the origin of modern echinoid fauna Open
Evolutionary radiations are fascinating phenomena corresponding to a dramatic diversification of taxa and a burst of cladogenesis over short periods of time. Most evolutionary radiations have long been regarded as adaptive but this has sel…
View article: Phylogeny of some Devonian trilobites and consequences for the systematics of <i>Austerops</i> (Phacopidae)
Phylogeny of some Devonian trilobites and consequences for the systematics of <i>Austerops</i> (Phacopidae) Open
A comprehensive phylogenetic hypothesis for Devonian phacopid trilobites of the genus Austerops has not previously been proposed. We carried out a cladistic analysis of the 13 species and subspecies assigned to Austerops, based on a data m…
View article: New Eocene Coleoid (Cephalopoda) Diversity from Statolith Remains: Taxonomic Assignation, Fossil Record Analysis, and New Data for Calibrating Molecular Phylogenies
New Eocene Coleoid (Cephalopoda) Diversity from Statolith Remains: Taxonomic Assignation, Fossil Record Analysis, and New Data for Calibrating Molecular Phylogenies Open
New coleoid cephalopods are described from statolith remains from the Middle Eocene (Middle Lutetian) of the Paris Basin. Fifteen fossil statoliths are identified and assigned to the Sepiidae (Sepia boletzkyi sp. nov.,? Sepia pira sp. nov.…
View article: Ammonoid recovery after the Permian–Triassic mass extinction: a re-exploration of morphological and phylogenetic diversity patterns
Ammonoid recovery after the Permian–Triassic mass extinction: a re-exploration of morphological and phylogenetic diversity patterns Open
The explosive ammonoid rediversification after the Permian–Triassic mass extinction is now well understood in terms of taxonomic richness and biogeography. Using an updated dataset of Early Triassic ammonoids, we compare morphological disp…
View article: High-resolution dynamics of Early Jurassic marine extinctions: the case of Pliensbachian–Toarcian ammonites (Cephalopoda)
High-resolution dynamics of Early Jurassic marine extinctions: the case of Pliensbachian–Toarcian ammonites (Cephalopoda) Open
The Pliensbachian–Toarcian interval was marked by major environmental disturbances and by a second-order mass extinction. Here, we reappraise the taxonomic, spatiotemporal and selective dynamics of extinctions over the whole interval, by a…
View article: Gastropods from upper Pliensbachian–Toarcian (Lower Jurassic) sediments of Causses Basin, southern France and their recovery after the early Toarcian anoxic event
Gastropods from upper Pliensbachian–Toarcian (Lower Jurassic) sediments of Causses Basin, southern France and their recovery after the early Toarcian anoxic event Open
A gastropod fauna has been studied from upper Pliensbachian – upper Toarcian deposits of two sections of the Causses Basin (southern France) in order to investigate the mode of recovery after the early Toarcian anoxic event. The fauna cons…