High-resolution dynamics of Early Jurassic marine extinctions: the case of Pliensbachian–Toarcian ammonites (Cephalopoda)

  title={High-resolution dynamics of Early Jurassic marine extinctions: the case of Pliensbachian–Toarcian ammonites (Cephalopoda)},
  author={Guillaume Dera and Pascal Neige and Jean-Louis Dommergues and Emmanuel Fara and R{\'e}mi Laffont and Pierre Pellenard},
  journal={Journal of the Geological Society},
  pages={21 - 33}
Abstract: 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 analysing a high-resolution dataset of 772 ammonite species from NW Tethyan and Arctic domains. On average, 40–65% of ammonite species disappeared during each subchronozone, but higher extinction pulses (reaching 70–90%) prevailed from the… 

Figures from this paper

Two pulses of extinction of larger benthic foraminifera during the Pliensbachian-Toarcian and early Toarcian environmental crises
Abstract The early Toarcian (Early Jurassic, ~183 Ma) was characterized by a pronounced oceanic anoxic event (OAE), global warming, major changes in hydrological cycling and a second order mass
Ammonite paleobiogeography during the Pliensbachian-Toarcian crisis (Early Jurassic) reflecting paleoclimate, eustasy, and extinctions
The Pliensbachian–Toarcian crisis (Early Jurassic) is one of the major Mesozoic paleoecological disturbances when ca. 20% of marine and continental families went extinct. Contemporaneously, profound
The middle Toarcian cold snap: Trigger of mass extinction and carbonate factory demise
Abstract The Pliensbachian and Toarcian (Early Jurassic) ages are characterised by several, relatively short-lived carbon cycle perturbations, climate change and faunal turnover. The cause(s) of
The Pliensbachian-Toarcian (Early Jurassic) extinction, a global multi-phased event
Abstract During the Pliensbachian–Toarcian interval of the Early Jurassic, there is a well-known second order marine extinction that is observable at the species and genus levels. Ammonite diversity
Benthic foraminiferal assemblages record major environmental perturbations during the Late Pliensbachian–Early Toarcian interval in the Peniche GSSP, Portugal
Abstract This is the first ecostratigraphic and palaeoecological analysis of the benthic foraminiferal assemblages, defined as morphogroups, in the Pliensbachian–Toarcian transition and the Toarcian
The response of calcareous nannoplankton to the latest Pliensbachian–early Toarcian environmental changes in the Camino Section (Basque Cantabrian Basin, northern Spain)
Abstract Quantitative analysis performed on latest Pliensbachian–early Toarcian calcareous nannofossil assemblages from the Camino section (Basque Cantabrian Basin) allowed their response to the
The driving mechanisms of the carbon cycle perturbations in the late Pliensbachian (Early Jurassic)
The data presented here show that causality between the Karoo LIP and the late Pliensbachian events cannot be maintained, and the first absolute timescale on the Kunae and Carlottense Zones is presented based on precise high-precision U-Pb geochronology, and additional geochemical proxies.
Ups and downs of belemnite diversity in the Early Jurassic of Western Tethys
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
Toarcian Oceanic Anoxic Event induced unusual behaviour and palaeobiological changes in Thalassinoides tracemakers
Abstract The Early Toarcian (Early Jurassic) global marine mass extinction is associated with one of the most important environmental perturbations of the Mesozoic, the Toarcian Oceanic Anoxic Event
Coupling of trace elements in brachiopod shells and biotic signals from the Lower Jurassic South-Iberian Palaeomargin (SE Spain): Implications for the environmental perturbations around the early Toarcian Mass Extinction Event
In the westernmost Tethys, the Early Jurassic involved critical environmental changes affecting marine ecosystems. Brachiopods were particularly affected in the South-Iberian Palaeomargin. A late


Biodiversity and biogeography of middle–late liassic ammonoids: implications for the early Toarcian mass extinction
Abstract In Western Tethyan areas, the Toarcian stage begins with two important evolutionary events in ammonite faunas: (1) the disruption of Tethyan–Boreal provinciality; (2) a biological crisis
The early Toarcian (Early Jurassic) and the Cenomanian–Turonian (Late Cretaceous) mass extinctions: similarities and contrasts
Abstract The early Toarcian (eTo) and Cenomanian–Turonian (C–T) mass extinctions are comparable from a wide range of scales and perspectives. From a broad standpoint, their similarities include:
Victims of the Early Toarcian anoxic event: the radiation and extinction of Jurassic Koninckinidae (Brachiopoda)
The significant mass extinction attributed to the Early Toarcian anoxic event had a severe impact on the phylum Brachiopoda. Beyond a serious decrease of species diversity, the extinction of the
Ammonite diversity and its palaeobiogeographical structure during the early Pliensbachian (Jurassic) in the western Tethys and adjacent areas
The early Pliensbachian (Early Jurassic) is known as a time of marked provincialism in the marine realm, notably between the Mediterranean Tethys and North–West Europe. In order to test this
The timing of paleoenvironmental change and cause-and-effect relationships during the early Jurassic mass extinction in Europe
The early Jurassic marine mass extinction is one of several crises thought to coincide with anoxia, transgression and warming caused by catastrophic release of gas hydrates. However, high-resolution
Area of mixed marine faunas between two major paleogeographical realms, exemplified by the Early Jurassic (Late Sinemurian and Pliensbachian) ammonites in the Alps
Abstract The Late Sinemurian and Pliensbachian ammonite faunas of the Alpine Range yield a good opportunity to study an area of mixed marine fauna. The faunas of the 4 major paleogeographical Alpine
Pliensbachian-Toarcian biotic turnover in north Siberia and the Arctic region
The biotic turnover in the Pliensbachian-Toarcian transition and changes in assemblages of bivalves, ostracodes, foraminifers, dinocysts, spores, and pollen are described. Only five of 24 bivalve
The two Early Toarcian (Early Jurassic) extinction events in ammonoids
The Early Toarcian (Early Jurassic) biological crisis was one of the ‘minor’ mass extinctions. It is linked with an oceanic anoxic event. Fossil data from sections located in northwestern European
Evidence for major environmental perturbation prior to and during the Toarcian (Early Jurassic) oceanic anoxic event from the Lusitanian Basin, Portugal
The timing and causal relationships between the pronounced negative C isotope excursion and paleoenvironmental perturbations associated with the Toarcian oceanic anoxic event (Early Jurassic) remain
Abstract New and previously published dinoflagellate cyst data from the Pliensbachian and early Toarcian of northern and southern Europe have been compared in order to define successions of Boreal