Extinction and renewal patterns among Tethyan belemnites in the Verrucosum Subzone (Valanginian) of southeast France

Janssen, Nico M.M.; Clément, Arnaud

doi:10.1006/cres.2002.1019

Cited by 20 publications

(10 citation statements)

References 25 publications

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“…As sea temperatures dropped, an influx of Boreal sea belemnoid and ammonoid cephalopods south into the Tethys resulted in a shift in the composition of cephalopod abundance, i.e. from a Duvaliidae‐dominated belemnoid fauna to a Mesohibolitidae‐dominated one (Janssen & Clément, 2002). Therefore, there are numerous potential causal agents involved in the extinction of metriorhynchids, ranging among habitat loss, climate change, and new biotic interactions (with newly radiating prey items and possible competitors).…”

Section: Discussionmentioning

confidence: 99%

The evolution of Metriorhynchoidea (mesoeucrocodylia, thalattosuchia): an integrated approach using geometric morphometrics, analysis of disparity, and biomechanics

Young¹,

Brusatte²,

Ruta³

et al. 2010

Zoological Journal of the Linnean Society

203

323

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Metriorhynchoid crocodylians represent the pinnacle of marine specialization within Archosauria. Not only were\ud they a major component of the Middle Jurassic–Early Cretaceous marine ecosystems, but they provide further\ud examples that extinct crocodilians did not all resemble their modern extant relatives. Here, we use a varied toolkit\ud of techniques, including phylogenetic reconstruction, geometric morphometrics, diversity counts, discrete character\ud disparity analysis, and biomechanical finite-element analysis (FEA), to examine the macroevolutionary history of\ud this clade. All analyses demonstrate that this clade became more divergent, in terms of biodiversity, form, and\ud function, up until the Jurassic–Cretaceous boundary, after which there is no evidence for recovery or further\ud radiations. A clear evolutionary trend towards hypercarnivory in Dakosaurus is supported by phylogenetic\ud character optimization, morphometrics, and FEA, which also support specialized piscivory within Rhacheosaurus\ud and Cricosaurus. Within Metriorhynchoidea, there is a consistent trend towards increasing marine specialization,\ud with the hypermarine Cricosaurus exhibiting numerous convergences with other Mesozoic marine reptiles (e.g. loss\ud of the deltopectoral crest and retracted external nares). In addition, biomechanics, morphometrics, and characterdisparity\ud analyses consistently distinguish the two newly erected metriorhynchid subfamilies. This study illustrates\ud that together with phylogeny, quantitative assessment of diversity, form, and function help elucidate the\ud macroevolutionary pattern of fossil clades

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Section: Discussionmentioning

confidence: 99%

The evolution of Metriorhynchoidea (mesoeucrocodylia, thalattosuchia): an integrated approach using geometric morphometrics, analysis of disparity, and biomechanics

Young¹,

Brusatte²,

Ruta³

et al. 2010

Zoological Journal of the Linnean Society

203

323

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“…This was based on nannofossil and belemnite evidence, as well as geochemical observations from the northwestern Tethys Ocean (Melinte and Mutterlose, 2001;Janssen and Clément, 2002;Pucéat et al, 2003;McArthur et al, 2007), the Boreal realm (Mutterlose and Kessels, 2000;Mutterlose et al, 2003;Price and Nunn, 2010), and the Western Pacific Ocean (here, the data interpretation is unclear, pointing to cooling or enhanced productivity, Brassell, 2009). Indirect evidence for the establishment of high-latitude ice caps is based on ice-rafted debris and glendonites (Kemper, 1987;Frakes and Francis, 1988;Price, 1999;Tarduno et al, 2002).…”

Section: Implications For Paleoenvironmental Changes In the Course Ofmentioning

confidence: 98%

No evidence for anoxia during the Valanginian carbon isotope event—An organic-geochemical study from the Vocontian Basin, SE France

Kujau

Heimhofer

Ostertag-Henning

et al. 2012

Global and Planetary Change

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“…In the VaBA3 association the stratigraphic distribution of belemnites is based primarily on their occurrences in the Angles, Source de l'Asse de Moriez, La Charce, and Vergol areas (see JANSSEN & CLÉMENT, 2002). More recent data allow a more precise correlation, and suggest that the base of VaBA3 can be fixed at bed 308 (Angles) or at bed 107 (Vergol), both of which are at the upper limit of the S. verrucosum Subzone (in the "Neocomites neocomiensis Subzone" sensu ATROPS & REBOULET, 1993 , 1992).…”

Section: Basin Faciesmentioning

confidence: 99%

Mediterranean Neocomian belemnites, part 3: Valanginian-Hauterivian belemnites

Janssen¹

2009

Carnets De Géologie (Notebooks on Geology)

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Abstract:The classical papers of RASPAIL (1829RASPAIL ( , 1830 and DUVAL-JOUVE (1841) described a wide range of belemnite species, mainly from the Lower Cretaceous of the Castellane-Peyroules area (Alpes de Haute-Provence, France). The present work focuses mainly on the biostratigraphy of these previously described belemnite taxa for their stratigraphic relationships had not been determined precisely. Here, biostratigraphy is related to the lithologic successions and faunal associations (ammonites) of various outcrops in the area studied. Complementary data were obtained from the La Lagne, Les Allaves and Pas d'Escale sections (Alpes de Haute-Provence, France). And, in order to attain a better understanding of the stratigraphic distribution of Late Valanginian belemnites in condensed glauconitic deposits, these assemblages are compared with belemnites from deeper water successions in the Angles, Source de l'Asse de Moriez, Cheiron areas and those in the vicinity of La Charce and Vergol that are even deeper.

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Extinction and renewal patterns among Tethyan belemnites in the Verrucosum Subzone (Valanginian) of southeast France

Cited by 20 publications

References 25 publications

The evolution of Metriorhynchoidea (mesoeucrocodylia, thalattosuchia): an integrated approach using geometric morphometrics, analysis of disparity, and biomechanics

The evolution of Metriorhynchoidea (mesoeucrocodylia, thalattosuchia): an integrated approach using geometric morphometrics, analysis of disparity, and biomechanics

No evidence for anoxia during the Valanginian carbon isotope event—An organic-geochemical study from the Vocontian Basin, SE France

Mediterranean Neocomian belemnites, part 3: Valanginian-Hauterivian belemnites

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