georefid:2013-017864SEDIS Publication Catalogue

ana.macario@awi.de

http://sedis.iodp.org/pub-catalogue/informationpointOfContact2013-07-08T00:00:00Zhttp://sedis.iodp.org/pub-catalogue/index.php?id=10.1371/journal.pone.00469132012-01-01publicationgeorefid:2013-017864doi:10.1371/journal.pone.0046913Thuy, BenUniversity of Goettingen, Department of Geobiology, Gottingen, GermanyauthorGale, Andy S.University of Portsmouth, United KingdomauthorKroh, AndreasNatural History Museum Vienna, AustriaauthorKucera, MichalUniversity of Bremen, GermanyauthorNumberger-Thuy, Lea D.Swedish Museum of Natural History, SwedenauthorReich, MikeauthorStohr, SabineauthorPublic Library of Science, San Francisco, CA, United StatespublisherdocumentHardcopyPloS One2012 (E46913)The origin and possible antiquity of the spectacularly diverse modern deep-sea fauna has been debated since the beginning of deep-sea research in the mid-nineteenth century. Recent hypotheses, based on biogeographic patterns and molecular clock estimates, support a latest Mesozoic or early Cenozoic date for the origin of key groups of the present deep-sea fauna (echinoids, octopods). This relatively young age is consistent with hypotheses that argue for extensive extinction during Jurassic and Cretaceous Oceanic Anoxic Events (OAEs) and the mid-Cenozoic cooling of deep-water masses, implying repeated re-colonization by immigration of taxa from shallow-water habitats. Here we report on a well-preserved echinoderm assemblage from deep-sea (1000-1500 m paleodepth) sediments of the NE-Atlantic of Early Cretaceous age (114 Ma). The assemblage is strikingly similar to that of extant bathyal echinoderm communities in composition, including families and genera found exclusively in modern deep-sea habitats. A number of taxa found in the assemblage have no fossil record at shelf depths postdating the assemblage, which precludes the possibility of deep-sea recolonization from shallow habitats following episodic extinction at least for those groups. Our discovery provides the first key fossil evidence that a significant part of the modern deep-sea fauna is considerably older than previously assumed. As a consequence, most major paleoceanographic events had far less impact on the diversity of deep-sea faunas than has been implied. It also suggests that deep-sea biota are more resilient to extinction events than shallow-water forms, and that the unusual deep-sea environment, indeed, provides evolutionary stability which is very rarely punctuated on macroevolutionary time scales.completedInvertebrate paleontologyAsteroideaAsterozoaAtlantic Oceanbiodiversitybiologic evolutionBlake NoseBlake PlateauCretaceousCrinoideaCrinozoadeep-sea environmentEchinodermataEchinoideaEchinozoafaunal studiesHolothuroideaInvertebrataLeg 171BLower Cretaceousmarine environmentmass extinctionsMesozoicmorphologyNorth AtlanticOcean Drilling ProgramODP Site 1049Ophiuroideapaleoecologypaleoenvironmentquantitative analysisStelleroideaurn:org.iodp:exp:171BurnlargerWorkCitationcampaignurn:org.iodp:exp:171A:site:1049urnlargerWorkCitationstudyurn:org.iodp:exp:171AurnlargerWorkCitationcampaignEnglishgeoscientificInformation-76.0644-76.064430.083230.0832