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    This article has been cited by the following publications. This list is generated based on data provided by CrossRef.

    Holland, Steven M. Patzkowsky, Mark E. and Benson, Roger 2015. The stratigraphy of mass extinction. Palaeontology, Vol. 58, Issue. 5, p. 903.


    McCobb, Lucy M. E. Boyce, W. Douglas Knight, Ian and Stouge, Svend 2014. Early Ordovician (Skullrockian) trilobites of the Antiklinalbugt Formation, northeast Greenland, and their biostratigraphic significance. Journal of Paleontology, Vol. 88, Issue. 5, p. 982.


    McCobb, Lucy M. E. Boyce, W. Douglas Knight, Ian and Stouge, Svend 2014. Early Ordovician (Skullrockian) Trilobites of the Antiklinalbugt Formation, Northeast Greenland, and their Biostratigraphic Significance. Journal of Paleontology, Vol. 88, Issue. 05, p. 982.


    Westrop, Stephen R. and Jin, Jisuo 2013. The Late Cambrian (Furongian) trilobiteTangshanaspisZhou and Zhang, 1978, in North America. Canadian Journal of Earth Sciences, Vol. 50, Issue. 8, p. 797.


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Left behind – delayed extinction and a relict trilobite fauna in the Cambrian–Ordovician boundary succession (east Laurentian platform, New York)

  • ED LANDING (a1), STEPHEN R. WESTROP (a2), BJÖRN KRÖGER (a3) and ADAM M. ENGLISH (a4)
  • DOI: http://dx.doi.org/10.1017/S0016756810000919
  • Published online: 19 November 2010
Abstract
Abstract

Two completely dissimilar faunal changes occur between the Sunwaptan and Skullrockian Stages (Ptychaspid and Symphysurid ‘Biomeres’) in the uppermost Cambrian on the east Laurentian craton. An undolomitized section in the Little Falls Formation in Washington County, New York, shows a typical ‘biomere’ extinction, with highest Sunwaptan trilobites followed by the abrupt appearance of Cordylodus proavus Zone conodonts and the lowest post-extinction trilobites (Parakoldinioidia Endo) 5.0 m higher. This stage boundary interval is very condensed by comparison with coeval Great Basin and Texas sections. Approximately 70 km southwest, typical pre-extinction taxa (the catillicephalid Acheilops Ulrich and several dikelocephalid species) are shown for the first time to persist well beyond the extinction as they occur with middle C. proavus Zone conodonts (Clavohamulus elongatus or, more likely, Hirsutodontus simplex Subzone). The Ritchie Limestone member of the uppermost Little Falls Formation yields a succession of conodont faunas that spans the C. elongatusH. simplexClavohamulus hintzei Subzones (middle–upper C. proavus Zone). These data prove that the trilobites are a relict fauna that persisted into the Symphysurina Zone of the Skullrockian Stage. The massive (burrow-churned), mollusc-dominated Ritchie Limestone, with the second Upper Cambrian cephalopod locality in east Laurentia, represents an inner-shelf refugium for Sunwaptan trilobites that has not been previously encountered. Final extinction of typical Sunwaptan clades is at least locally diachronous, and a simple, genus-based approach to trilobite biostratigraphy in the Cambrian–Ordovician boundary interval is untenable. The relict fauna appears to be distinct at the species level, so it is likely that a viable, species-based biostratigraphy can be developed. Teridontus gallicus Serpagli et al. 2008 is a synonym of T. nakamurai (Nogami, 1967), and T.? francisi Landing sp. nov., with a large base and tiny cusp, is a lower C. proavus Zone form. New trilobites are Acheilops olbermanni Westrop sp. nov. and Parakoldinioidia maddowae Westrop sp. nov. The lowest Ordovician ‘Gailor Dolomite’ is a junior synonym of the Tribes Hill Formation, and the Ritchie Limestone is assigned to the top of the terminal Cambrian Little Falls Formation.

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Author for correspondence: elanding@mail.nysed.gov
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B. W. Brook , N. S. Sodhi & C. A. J. Bradshaw 2008. Synergies among extinction drivers under global change. Trends in Ecology and Evolution 23, 453–60.

D. K. Choi , D. H. Kim , J. W Sohn , & S-B. Lee 2003. Trilobite faunal successions across the Cambrian-Ordovician boundary intervals in Korea and their correlation with China and Australia. Journal of Asian Earth Sciences 21, 781–93.

R. K. Didham , J. M. Tylianikis , N. J. Gemmell , T. A. Rand & R. M. Ewers 2007. Interactive effects of habitat modification and species invasion on native species decline. Trends in Ecology and Evolution 22, 489–96.

W. Eichenberg 1930. Conodonten aus dem Culm des Harzes. Paläontologisches Zeitschrift 12, 177–82.

B.-D. Erdtmann 1986. Early Ordovician eustatic cycles and their bearing on punctuations in early nematophorid (planktic) graptolite evolution. Lectures in Earth Sciences 8, 139–52.

D. W. Fisher 1954. Lower Ordovician (Canadian) stratigraphy of the Mohawk valley. Bulletin of the Geological Society of America 65, 7196.

D. W. Fisher & G. F. Hanson 1951. Revisions in the geology of Saratoga Springs, New York, and vicinity. American Journal of Science 249, 795814.

D. W. Fisher & S. J. Mazzullo 1976. Lower Ordovician (Gasconadian) Great Meadows Formation in eastern New York. Geological Society of America Bulletin 87, 1443–8.

G. M. Friedman 1980. Dolomite is an evaporate mineral: evidence from the rock record and from sea-marginal ponds of the Red Sea. In Concepts and Models of Dolomitization (eds D. H. Zenger , J. B. Dunham & R. L. Ethington ), pp. 6980. SEPM Special Publication no. 28.

I. Hanski , H. Koivulehto , A. Cameron , & P. Rahagalala 2007. Deforestation and apparent extinctions of endemic forest beetles in Madagascar. Biology Letters 3, 344–7.

B. U. Haq & S. R. Schutter 2008. A chronology of Paleozoic sea-level changes. Science 322, 64–8.

G. Harris & S. L. Pimm 2008. Range size and extinction risk in birds. Conservation Biology 22, 163–71.




E. Landing 1993. Cambrian–Ordovician boundary in the Taconic allochthon, eastern New York, and its interregional correlation. Journal of Paleontology 67, 119.

E. Landing , S. A. Bowring , K. Davidek , S. R. Westrop , G. Geyer & W. Heldmaier 1998. Duration of the Early Cambrian: U-Pb ages of volcanic ashes from Avalon and Gondwana. Canadian Journal of Earth Sciences 35, 329–38.

E. Landing & B. Kröger 2009. The oldest cephalopods from east Laurentia. Journal of Paleontology 83, 8993.

E. Landing & J. B. Murphy 1991. Uppermost Precambrian(?)–Lower Cambrian of mainland Nova Scotia: faunas, depositional environment, and stratigraphic revision. Journal of Paleontology 65, 382–96.

E. Landing & S. R. Westrop 2006. Early Ordovician faunas, stratigraphy, and sea-level history of the middle Beekmantown Group, northeastern New York. Journal of Paleontology 80, 958–80.


E. Landing , S. R. Westrop & L. Knox 1996. Conodonts, stratigraphy, and relative sea-level changes of the Tribes Hill Formation (Lower Ordovician), east-central New York. Journal of Paleontology 70, 652–76.

E. Landing , S. R. Westrop & L. Van Aller Hernick 2003. Uppermost Cambrian–Lower Ordovician faunas and Laurentian platform sequence stratigraphy, eastern New York and Vermont. Journal of Paleontology 77, 7898.

S-B. Lee , D-C. Lee & D. K. Choi 2008. Cambrian–Ordovician family Missisquoiidae Hupé, 1955: systematic revision and palaeogeographical considerations based upon cladistic analysis. Palaeogeography, Palaeoclimatology, Palaeoecology 260, 315–41.

J. D. Loch , J. H. Stitt & J. R. Derby 1993. Cambrian–Ordovician boundary interval extinctions: implications of revised trilobite and brachiopod data from Mount Wilson, Alberta, Canada. Journal of Paleontology 67, 497517.

C. Lochman-Balk 1970. Upper Cambrian faunal patterns on the craton. Geological Society of America Bulletin 81, 3197–224.

R. Ludvigsen & S. R. Westrop 1983 b. Trilobite biofacies of the Cambrian–Ordovician boundary interval in northern North America. Alcheringa 7, 301–19.

R. Ludvigsen & S. R. Westrop 1985. Three new Upper Cambrian stages for North America. Geology 13, 139–43.

J. F. Miller 1984. Cambrian and earliest Ordovician conodont evolution, biofacies and provincialism. In Conodont biofacies and provincialism (ed. D. L. Clark ), pp. 4368. Geological Society of America Special Paper 196.

A. R. Palmer 1998. A proposed nomenclature for stages and series for the Cambrian of Laurentia. Canadian Journal of Earth Sciences 35, 323–8.

S. L. Pimm & R. A. Askins 1995. Forest losses predict bird extinctions in eastern North America. Proceedings of the National Academy of Sciences, USA 92, 9343–7.

P. E. Raymond 1937. Upper Cambrian and Lower Ordovician Trilobita and Ostracoda from Vermont. Geological Society of America Bulletin 48, 1079–146.

P. E Schulte , L. Alegret , I. Arenillas , J. A. Arz P. J. Barton , P. R. Bown , T. J. Bralower , G. L. Christeson , P. Claeys , C. S. Cockell , G. S. Collins , Al. Deutsch , T. J. Goldin , K. Goto , J. M. Grajales-Nishimura , R. A. F. Grieve , S. P. S. Gulick , K. R. Johnson , W. Kiessling , C. Koeberl , D. A. Kring , K. G. Macleod , T. Matsui , J. Melosh , A. Montanari , J. V. Morgan , C. R. Neal , D. J. Nichols , R. D. Norris , E. Pierazzo , G. Ravizza , M. Rebolledo-Vieyra , W. U. Reimold , E. Robin , T. Salge , R. P. Speijer , A. R. Sweet , J. Urrutia-Fucugauchi , V. Vajda , M. T. Whalen & P. S. Willumsen 2010. The Chicxulub asteroid impact crater and mass extinction at the Cretaceous–Paleogene boundary. Science 327, 1214–18.

C. R. Scotese & W. S. McKerrow 1990. Revised world maps and introduction. Geological Society of London Memoir 12, 121.


J. W. Sohn & D. K. Choi 2007. Furongian trilobites from the Asioptychaspis and Quadraticephalus Zones of the Hwajeol Formation, Taebaeksan Basin, Korea. Geosciences Journal 11, 297314.

S. R. Westrop 1986 a. New ptychaspidid trilobites from the Upper Cambrian Mistaya Formation of southern Alberta. Canadian Journal of Earth Sciences 23, 214–21.

S. R. Westrop & M. B. Cuggy 1999. Comparative paleoecology of Cambrian trilobite extinctions. Journal of Paleontology 73, 337–54.

S. R. Westrop & R. Ludvigsen 1987. Biogeographic control of trilobite mass extinction at an Upper Cambrian ‘biomere’ boundary. Paleobiology 13, 8499.

S. R. Westrop , A. R. Palmer & A. Runkel 2005. A new Sunwaptan (Late Cambrian) trilobite fauna from the upper Mississippi Valley. Journal of Paleontology 79, 7288.

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