simultaneous origin of protective armour and infaunal shelters at the Precambrian–Cambrian transition (original) (raw)

none 10.1144/SP286.30 Geological Society of London Geological Society of London 1881 30600943 65091 2024072310105300772 10.1144 2024-07-24T02:17:36Z 2007-12-13T16:54:24Z 25 Geological Society, London, Special Publications SP 0305-8719 2041-4927 12 13 2007 01 2007 286 1 The Verdun Syndrome: simultaneous origin of protective armour and infaunal shelters at the Precambrian–Cambrian transition J. Dzik Instytut Paleobiologii PAN, Twarda 51/55, 00–818 Warszawa, and Instytut Zoologii, Uniwersytet Warszawski, Banacha 2, 00–913 Warszawa, Poland (e-mail: ) Abstract All of the structurally identifiable latest Ediacaran and earliest Cambrian infaunal trace fossils represent shelters of animals feeding above the sediment surface. It is the case with the most complete and oldest radiometrically dated Precambrian–Cambrian transition strata along the Khorbusuonka River in northern Siberia, in the basal Cambrian succession at Meishucun in southern China, richest in small shelly fossils, as well as in the type succession of the Vendian in Podolia, Ukraine. The oldest traces of feeding within the mud are known from no earlier than the late Tommotian of Siberia, Mongolia, Sweden, and Poland. This suggests that the invention of hydraulic mechanisms of sediment penetration was enforced by predation, not by trophic needs. Various ways to protect the body by secretion of a mineral skeleton or building tubes by collected mineral grains were developed by other animals at the same time. Predation may thus appear to be the triggering mechanism for the ‘Cambrian explosion’. Subsequent increase in the depth of bioturbation resulted in a profound change of taphonomic conditions, artificially enhancing the effects of evolution. 10 26 2007 01 2007 405 414 10.1144/SP286.30 https://doi.org/10.15223/policy-002 10.1144/SP286.30 https://www.lyellcollection.org/doi/10.1144/SP286.30 https://www.lyellcollection.org/doi/pdf/10.1144/SP286.30 https://pubs.geoscienceworld.org/books/book/1658/chapter/107484836/the-verdun-syndromesimultaneous-origin-of https://pubs.geoscienceworld.org/UrlRedirectHandler.ashx?routename=books&chapterdoi=10.1144/SP286.30&request=chapter 10.1126/science.257.5068.367 10.1126/science.277.5332.1645 10.1126/science.11539488 Dynamics in Metazoan Evolution: The Origin of the Coelom and Segments Clark R. B. 1964 Clark R. B.Dynamics in Metazoan Evolution: The Origin of the Coelom and Segments1964OxfordClarendon Press Special Papers in Palaeontology Conway Morris S. 1 20 1977 Fossil priapulid worms Conway Morris S.Fossil priapulid wormsSpecial Papers in Palaeontology197720197 10.1017/S0016756800024158 10.1073/pnas.202322499 Acta Palaeontologica Polonica Dzik J. 247 39 3 1994 Evolution of ‘small shelly fossils’ assemblages of the early Paleozoic Dzik J.Evolution of ‘small shelly fossils’ assemblages of the early PaleozoicActa Palaeontologica Polonica1994393247313 10.1093/icb/43.1.114 10.1666/0094-8373(2005)031[0503:BAAUOT]2.0.CO;2 Report of the Session of the International Geological Congress, Stockholm Evans J. W. 543 1910 1912 The sudden appearance of the Cambrian fauna Evans J. W.The sudden appearance of the Cambrian faunaReport of the Session of the International Geological Congress, Stockholm19121910543546 Vendskaya Sistema. Istoriko-geologicheskoye i paleontologicheskoye obosnovanie. 1 Paleontologia Fedonkin M. A. 112 1985 Fedonkin M. A., Sokolov B. S., Ivanovsky A. B.Paleoikhnologia vendskich MetazoaVendskaya Sistema. Istoriko-geologicheskoye i paleontologicheskoye obosnovanie. 1 Paleontologia1985Moscow [in Russian].Nauka112117 10.2307/3515360 10.1017/S001675680100509X Beringeria Special issue Geyer G. 175 2 1995 Ichnofossil assemblages from the Nama Group (Neoproterozoic–Lower Cambrian) in Namibia and the Proterozoic–Cambrian boundary problem revisited Geyer G., Uchman A.Ichnofossil assemblages from the Nama Group (Neoproterozoic–Lower Cambrian) in Namibia and the Proterozoic–Cambrian boundary problem revisitedBeringeria Special issue19952175202 10.1017/S0016756800007573 10.1017/S0016756800006294 10.1080/00241160410005088 10.1016/0301-9268(94)00071-X 10.1144/0016-764901-127 10.18261/8200376656-1997-01 10.1093/icb/43.1.219 10.3176/geol.2001.2.01 10.1130/0091-7613(2000)28<143:CTFFTT>2.0.CO;2 10.1016/j.palaeo.2003.09.035 10.1017/S0016756800023700 10.1017/S0016756801005684 10.1080/03115519708619171 10.2307/3515361 Acta Palaeontologica Polonica OrŁowski S. 385 41 1996 Non-arthropod burrows from the Middle and Late Cambrian of the Holy Cross Mountains, Poland OrŁowski S., Żylińska A.Non-arthropod burrows from the Middle and Late Cambrian of the Holy Cross Mountains, PolandActa Palaeontologica Polonica199641385409 Prace Państwowego Instytutu Geologicznego Pacześna J. 1 152 1996 The Vendian and Cambrian ichnocoenoses from the Polish part of the East-European Platform Pacześna J.The Vendian and Cambrian ichnocoenoses from the Polish part of the East-European PlatformPrace Państwowego Instytutu Geologicznego1996152177 Palij V. M.Bilobate traces from the deposits of the Baltic series in the Dniester Region1974Doklady AN URSR weirs B (1). [in Ukrainian] Upper Precambrian and Cambrian Palaeontology of the East European Platform Palij W. M. 56 1983 Palij W. M., Posti E., Fedonkin M. A., Urbanek A., Rozanov A. Y.Soft-bodied Metazoa and animal trace fossils in the Vendian and early CambrianUpper Precambrian and Cambrian Palaeontology of the East European Platform1983WarszawaWydawnictwa Geologiczne5693 10.1130/0016-7606(1996)108<0992:EOCCFI>2.3.CO;2 10.18261/8200374157-1989-01 Fossile Kunst. Albumblätter der Erdgeschichte Seilacher A. 1995 Seilacher A.Fossile Kunst. Albumblätter der Erdgeschichte1995Korb.Goldschneck Verlag 10.2307/3515363 10.1017/S0022336000029863 10.1139/e72-001