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Volumn 8, Issue 3, 2004, Pages 199-218

Low-diversity shallow marine benthic fauna from the Smithian of northeast Japan: Paleoecologic and paleobiogeographic implications

Author keywords

Crinoid; HCS; Lower Triassic; Maizuru; Mass extinction; Permian Triassic event; Recovery; Smithian; South Kitakami; South Primorye

Indexed keywords

BENTHOS; PALEOBIOGEOGRAPHY; PALEOECOLOGY; TRIASSIC;

EID: 10644273465     PISSN: 13428144     EISSN: None     Source Type: Journal    
DOI: 10.2517/prpsj.8.199     Document Type: Article
Times cited : (28)

References (52)
  • 1
    • 85040846135 scopus 로고
    • Storm depositional systems
    • Springer, Berlin
    • Aigner, T., 1985: Storm depositional systems, 174p. Springer, Berlin.
    • (1985) , pp. 174
    • Aigner, T.1
  • 2
    • 6444225220 scopus 로고
    • The Triassic stratigraphy and ammonite fauna of Japan
    • Science Reports of Tohoku University, 2nd Series (Geology)
    • Bando, Y., 1964: The Triassic stratigraphy and ammonite fauna of Japan. Science Reports of Tohoku University, 2nd Series (Geology), vol. 36, p. 1-137.
    • (1964) , vol.36 , pp. 1-137
    • Bando, Y.1
  • 3
    • 33544469584 scopus 로고
    • Stratigraphic problems concerning the newly occurred Lower Triassic ammonites from the Kitakami massif and the Maizuru Zone
    • Memoirs of Faculty of Education, Kagawa University (in Japanese with English abstract)
    • Bando, Y., 1968: Stratigraphic problems concerning the newly occurred Lower Triassic ammonites from the Kitakami massif and the Maizuru Zone. Memoirs of Faculty of Education, Kagawa University, vol. 174, p. 1-7. (in Japanese with English abstract)
    • (1968) , vol.174 , pp. 1-7
    • Bando, Y.1
  • 6
    • 10644228962 scopus 로고
    • Versteinerungen aus den Trias-Ablagerungen des Süd-Usuri-Gebietes in der Ostsibirischen Küstenprovinz
    • Mémoires du Comité Géologique (in German)
    • Bittner, A., 1899: Versteinerungen aus den Trias-Ablagerungen des Süd-Usuri-Gebietes in der Ostsibirischen Küstenprovinz. Mémoires du Comité Géologique, vol. 7, no. 4, p. 1-35. (in German)
    • (1899) , vol.7 , Issue.4 , pp. 1-35
    • Bittner, A.1
  • 7
    • 84957002289 scopus 로고    scopus 로고
    • Biotic recovery from mass extinctions
    • Briggs, D.E.G. and Crowther, P.R., eds., Blackwell Scientific Publications
    • Bottjer, D.J., 2001: Biotic recovery from mass extinctions. In, Briggs, D.E.G. and Crowther, P.R., eds., Paleobiology II, p. 202-206. Blackwell Scientific Publications.
    • (2001) Paleobiology , vol.2 , pp. 202-206
    • Bottjer, D.J.1
  • 8
    • 0024825399 scopus 로고
    • Shelf sandstones in the Mowry shale: Evidence for deposition during Cretaceous sea level falls
    • Davis, H. R. and Byers, C. W., 1989: Shelf sandstones in the Mowry shale: evidence for deposition during Cretaceous sea level falls. Journal of Sedimentary Petrology, vol. 59, p. 548-560.
    • (1989) Journal of Sedimentary Petrology , vol.59 , pp. 548-560
    • Davis, H.R.1    Byers, C.W.2
  • 9
    • 0030176880 scopus 로고    scopus 로고
    • Permian fusulinids from the Koryak Terrane, Northeastern Russia, and their paleogeographic affinity
    • Davydov, V.I., Belasky, P. and Karavayeva, N. I., 1996: Permian fusulinids from the Koryak Terrane, Northeastern Russia, and their paleogeographic affinity. Journal of Foraminiferal Research, vol. 26, p. 213-243.
    • (1996) Journal of Foraminiferal Research , vol.26 , pp. 213-243
    • Davydov, V.I.1    Belasky, P.2    Karavayeva, N.I.3
  • 10
    • 0020423842 scopus 로고
    • Hummocky stratification: Significance of its variable bedding sequences
    • Dott, R. H., Jr. and Bourgeois, J., 1982: Hummocky stratification: significance of its variable bedding sequences. Geological Society of America Bulletin, vol. 93, p. 663-680.
    • (1982) Geological Society of America Bulletin , vol.93 , pp. 663-680
    • Dott Jr., R.H.1    Bourgeois, J.2
  • 11
    • 0003695049 scopus 로고
    • The Great Palaeozoic Crisis: Life and Death in the Permian
    • Columbia University Press, New York
    • Erwin, R. H., 1993: The Great Palaeozoic Crisis: Life and Death in the Permian, 327p. Columbia University Press, New York.
    • (1993) , pp. 327
    • Erwin, R.H.1
  • 12
    • 0028181962 scopus 로고
    • The Permo-Triassic extinction
    • Erwin, R. H., 1994: The Permo-Triassic extinction. Nature, vol. 367, p. 231-236.
    • (1994) Nature , vol.367 , pp. 231-236
    • Erwin, R.H.1
  • 13
    • 0002206261 scopus 로고    scopus 로고
    • Understanding biotic recoveries: Extinction, survival, and preservation during the end-Permian mass extinction
    • Jablonski, D., Erwin, D. H. and Lipps, J. H., eds., University of Chicago Press, Chicago
    • Erwin, R. H., 1996: Understanding biotic recoveries: extinction, survival, and preservation during the end-Permian mass extinction. In Jablonski, D., Erwin, D. H. and Lipps, J. H., eds., Evolutionary Paleobiology, p. 398-418. University of Chicago Press, Chicago.
    • (1996) Evolutionary Paleobiology , pp. 398-418
    • Erwin, R.H.1
  • 14
    • 5944262626 scopus 로고    scopus 로고
    • Recoveries and radiations: Gastropods after the Prmo-Triassie mass extinction
    • Hart, M. B., ed., Geological Society Special Publication 102, Geological Society, London
    • Erwin, R. H. and Pan, H.-Z., 1996: Recoveries and radiations: gastropods after the Prmo-Triassie mass extinction. In, Hart, M. B., ed., Biotic Recovery from Mass Extinction Events, Geological Society Special Publication 102, p. 223-229. Geological Society, London.
    • (1996) Biotic Recovery from Mass Extinction Events , pp. 223-229
    • Erwin, R.H.1    Pan, H.-Z.2
  • 15
    • 0001170880 scopus 로고
    • The case for sea level change as a dominant causal factor in mass extinction of marine invertebrates
    • Hallam, A., 1989: The case for sea level change as a dominant causal factor in mass extinction of marine invertebrates. Royal Society of London Philosophical Transactions, vol. B325, p. 437-455.
    • (1989) Royal Society of London Philosophical Transactions , vol.B325 , pp. 437-455
    • Hallam, A.1
  • 16
    • 0344663174 scopus 로고
    • Notes on the Cretaceous Miyako Group
    • pls. 1-4. (in Japanese with English abstract)
    • Hanai, T., Obata, I. and Hayami, I. 1968: Notes on the Cretaceous Miyako Group. Memoirs of the National Science Museum, vol. 1, p. 20-28, pls. 1-4. (in Japanese with English abstract)
    • (1968) Memoirs of the National Science Museum , vol.1 , pp. 20-28
    • Hanai, T.1    Obata, I.2    Hayami, I.3
  • 18
    • 33544455223 scopus 로고
    • The Triassic system in the Southern Kitakami Mountains
    • Mitsuchi, T., ed., Geological Survey of Japan, Tokyo
    • Ichikawa, K., 1951: The Triassic system in the Southern Kitakami Mountains. In, Mitsuchi, T., ed., Triassic Stratigraphy of Japan, Report Special Number, p. 7-23. Geological Survey of Japan, Tokyo.
    • (1951) Triassic Stratigraphy of Japan, Report Special Number , pp. 7-23
    • Ichikawa, K.1
  • 19
    • 0030620777 scopus 로고    scopus 로고
    • Permo-Triassic boundary superanoxia and stratified superocean: Records from lost deep sea
    • Isozaki, Y. 1997: Permo-Triassic boundary superanoxia and stratified superocean: records from lost deep sea. Science, vol. 276, p. 235-238.
    • (1997) Science , vol.276 , pp. 235-238
    • Isozaki, Y.1
  • 20
    • 0001777863 scopus 로고
    • Coarse elastic sedimentation in the Triassic offshore sequence of the Southern Kitakami Mountains, Japan
    • Taira, A. and Masuda, F., eds., Terra Scientific Publishing Company, Tokyo
    • Kamada, K., 1989: Coarse elastic sedimentation in the Triassic offshore sequence of the Southern Kitakami Mountains, Japan. In, Taira, A. and Masuda, F., eds., Sedimentary Facies in the Active Plate Margin p. 365-375. Terra Scientific Publishing Company, Tokyo.
    • (1989) Sedimentary Facies in the Active Plate Margin , pp. 365-375
    • Kamada, K.1
  • 21
    • 85009766149 scopus 로고
    • Hummocky cross stratification of the Lower Triassic at the Kamiwarizaki in the Southern Kitakami Mountains, Japan
    • Hirosaki University (in Japanese with English abstract)
    • Kamada, K., 1992: Hummocky cross stratification of the Lower Triassic at the Kamiwarizaki in the Southern Kitakami Mountains, Japan. Bulletin of Faculty of Education, Hirosaki University, vol. 67, p. 25-33. (in Japanese with English abstract)
    • (1992) Bulletin of Faculty of Education , vol.67 , pp. 25-33
    • Kamada, K.1
  • 22
    • 0001827650 scopus 로고
    • Geology of the Tsuya District. With Geological Sheet Map at 1:50,000
    • in Japanese with English abstract
    • Kamada, K., 1993: Geology of the Tsuya District. With Geological Sheet Map at 1:50,000, 70p. Geological Survey of Japan, Tsukuba. (in Japanese with English abstract)
    • (1993) Geological Survey of Japan, Tsukuba , pp. 70
    • Kamada, K.1
  • 23
    • 0345043707 scopus 로고
    • Lower Triassic storm deposit in the Southern Kitakami Mountains
    • in Japanese
    • Kamada, K. and Kawamura, T., 1988: Lower Triassic storm deposit in the Southern Kitakami Mountains. Chikyu Monthly, vol. 10, p. 494-498. (in Japanese)
    • (1988) Chikyu Monthly , vol.10 , pp. 494-498
    • Kamada, K.1    Kawamura, T.2
  • 24
    • 0003328529 scopus 로고
    • On the boundary between the Permian and Triassic Systems in Japan
    • pls. 1-19
    • Kambe, N., 1963: On the boundary between the Permian and Triassic Systems in Japan. Report, Geological Survey of Japan, vol. 198, p. 1-66, pls. 1-19.
    • (1963) Report, Geological Survey of Japan , vol.198 , pp. 1-66
    • Kambe, N.1
  • 25
    • 0001555382 scopus 로고
    • Taphonomy and time-averaging of marine shelly faunas
    • Allison, P. A. and Briggs, D. E. G., eds., Plenum Press, New York
    • Kidwell, S.M. and Bosence, D.W.J., 1991: Taphonomy and time-averaging of marine shelly faunas. In, Allison, P. A. and Briggs, D. E. G., eds., Taphonomy: Releasing the Data Locked in the Fossil Record, p. 115-209. Plenum Press, New York.
    • (1991) Taphonomy: Releasing the Data Locked in the Fossil Record , pp. 115-209
    • Kidwell, S.M.1    Bosence, D.W.J.2
  • 26
    • 79952100883 scopus 로고
    • The Lower Triassic pelecypods from the Ussuriland
    • Trudy Geologiĉheskogo Instituta Akademii Nauk SSSR. (in Russian with English translation)
    • Kiparisova, L. D., 1938: The Lower Triassic pelecypods from the Ussuriland. Trudy Geologiĉheskogo Instituta Akademii Nauk SSSR, vol. 7. p. 197-311. (in Russian with English translation )
    • (1938) , vol.7 , pp. 197-311
    • Kiparisova, L.D.1
  • 27
    • 10644283361 scopus 로고
    • A contribution to the stratigraphy of the lower Triassic of the south Ussuri coastal region (Primorié)
    • Kiparisova, L.D., 1945: A contribution to the stratigraphy of the lower Triassic of the south Ussuri coastal region (Primorié). Doklady Akademii Nauk USSR, vol. 49, p. 438-441.
    • (1945) Doklady Akademii Nauk USSR , vol.49 , pp. 438-441
    • Kiparisova, L.D.1
  • 29
    • 0033165893 scopus 로고    scopus 로고
    • Tethyan uppermost Permian (Dzhulfian and Dorashamian) foraminiferal faunas and their paleogeographic and tectonic implications
    • Kobayashi, F., 1999: Tethyan uppermost Permian (Dzhulfian and Dorashamian) foraminiferal faunas and their paleogeographic and tectonic implications. Palaeogeography Palaeoclimatology Palaeoecology, vol. 150, p. 279-307.
    • (1999) Palaeogeography Palaeoclimatology Palaeoecology , vol.150 , pp. 279-307
    • Kobayashi, F.1
  • 30
    • 85039479427 scopus 로고
    • The Triassic Fauna
    • Mitsuchi, T., ed., Report Special Number, Geological Survey of Japan, Tokyo
    • Kobayashi, T. and Ichikawa, K., 1951: The Triassic Fauna. In, Mitsuchi, T., ed., Triassic Stratigraphy of Japan, Report Special Number, p. 4-7. Geological Survey of Japan, Tokyo.
    • (1951) Triassic Stratigraphy of Japan , pp. 4-7
    • Kobayashi, T.1    Ichikawa, K.2
  • 31
    • 0002245387 scopus 로고
    • Mesozoic and Cenozoic evolution of Asia
    • Ben-Avraham, Z., ed., Oxford Monographs on Geology and Geophysics
    • Maruyama, S., Liou, J. G. and Seno, T., 1989: Mesozoic and Cenozoic evolution of Asia. In, Ben-Avraham, Z., ed., The Evolution of the Circum Pacific Margins. Oxford Monographs on Geology and Geophysics no. 8, p. 75-99.
    • (1989) The Evolution of the Circum Pacific Margins , Issue.8 , pp. 75-99
    • Maruyama, S.1    Liou, J.G.2    Seno, T.3
  • 32
    • 0038624140 scopus 로고
    • The Triassic System in the Maizuru Zone, Southwest Japan
    • Memoirs of College of Science, University of Kyoto, Series B
    • Nakazawa, K., 1958: The Triassic System in the Maizuru Zone, Southwest Japan. Memoirs of College of Science, University of Kyoto, Series B vol. 24, p. 265-313.
    • (1958) , vol.24 , pp. 265-313
    • Nakazawa, K.1
  • 33
    • 0038367353 scopus 로고
    • Permian and Eo-Triassic Bakevellias from the Maizuru Zone, Southwest Japan
    • Memoirs of College of Science, University of Kyoto, Series B, pls. 3, 4
    • Nakazawa, K., 1959: Permian and Eo-Triassic Bakevellias from the Maizuru Zone, Southwest Japan. Memoirs of College of Science, University of Kyoto, Series B, vol. 26, p. 193-213, pls. 3, 4.
    • (1959) , vol.26 , pp. 193-213
    • Nakazawa, K.1
  • 34
    • 0038705690 scopus 로고
    • Permian and Eo-Triassic Myophoriidae from the Maizuru Zone, Southwest Japan
    • pl. 6
    • Nakazawa, K., 1960: Permian and Eo-Triassic Myophoriidae from the Maizuru Zone, Southwest Japan. Japanese Journal of Geology and Geography, vol. 31, p. 49-61, pl. 6.
    • (1960) Japanese Journal of Geology and Geography , vol.31 , pp. 49-61
    • Nakazawa, K.1
  • 35
    • 0038029181 scopus 로고
    • Early and Middle Triassic pelecypodfossils from the Maizuru Zone, Southwest Japan
    • Memoirs of College of Science, University of Kyoto, Series B, pls. 12-14
    • Nakazawa, K., 1961: Early and Middle Triassic pelecypodfossils from the Maizuru Zone, Southwest Japan. Memoirs of College of Science, University of Kyoto, Series B, vol. 27, p. 249-279, pls. 12-14.
    • (1961) , vol.27 , pp. 249-279
    • Nakazawa, K.1
  • 36
    • 10644280343 scopus 로고
    • The Lower Triassic Kurotaki Fauna in Shikoku and its allied faunas in Japan
    • Memoirs of College of Science, University of Kyoto, Series B, pls. 23-25
    • Nakazawa, K., 1971: The Lower Triassic Kurotaki Fauna in Shikoku and its allied faunas in Japan. Memoirs of College of Science, University of Kyoto, Series B, vol. 38, p. 103-133, pls. 23-25.
    • (1971) , vol.38 , pp. 103-133
    • Nakazawa, K.1
  • 38
    • 0002995761 scopus 로고
    • Permian fusulinacean biogeographic provinces in Asia and their tectonic implications
    • Taira, A. and Tashiro, M., eds., Terra Science Publishing Company, Tokyo
    • Ozawa, T., 1987: Permian fusulinacean biogeographic provinces in Asia and their tectonic implications. In, Taira, A. and Tashiro, M., eds., Historical Biogeography and Plate Tectonic Evolution of Japan and Eastern Asia, p. 45-63. Terra Science Publishing Company, Tokyo.
    • (1987) Historical Biogeography and Plate Tectonic Evolution of Japan and Eastern Asia , pp. 45-63
    • Ozawa, T.1
  • 39
    • 2442484433 scopus 로고    scopus 로고
    • Proliferation of Early Triassic wrinkle structures: Implications for environmental stress following the end-Permian mass extinction
    • Pruss, S., Fraiser, M. and Bottjer, D.J., 2004: Proliferation of Early Triassic wrinkle structures: Implications for environmental stress following the end-Permian mass extinction. Geology, vol. 32, p. 461-464.
    • (2004) Geology , vol.32 , pp. 461-464
    • Pruss, S.1    Fraiser, M.2    Bottjer, D.J.3
  • 40
    • 0001518973 scopus 로고
    • South Kitakami region; an allochthonous terrane in Japan
    • Saito, Y. and Hashimoto, M., 1982: South Kitakami region; an allochthonous terrane in Japan. Journal of Geophysical Research B, vol. 87, p. 3691-3696.
    • (1982) Journal of Geophysical Research B , vol.87 , pp. 3691-3696
    • Saito, Y.1    Hashimoto, M.2
  • 41
    • 0026448595 scopus 로고
    • Paleobiology of the oldest known articulate crinoid
    • Schubert, J. K., Bottjer, D. J. and Simms, M. J., 1992: Paleobiology of the oldest known articulate crinoid. Lethaia, vol. 25, p. 97-110.
    • (1992) Lethaia , vol.25 , pp. 97-110
    • Schubert, J.K.1    Bottjer, D.J.2    Simms, M.J.3
  • 42
    • 84879889436 scopus 로고
    • Early Triassic stromatolites as post-mass extinction disaster forms
    • Schubert, J. K. and Bottjer, D. J., 1992: Early Triassic stromatolites as post-mass extinction disaster forms. Geology, vol. 20, p. 883-886.
    • (1992) Geology , vol.20 , pp. 883-886
    • Schubert, J.K.1    Bottjer, D.J.2
  • 43
    • 0028976116 scopus 로고
    • Aftermath of the Permian-Triassic mass extinction event: Paleoecology of Lower Triassic carbonates in the western USA
    • Schubert, J.K. and Bottjer, D.J., 1995: Aftermath of the Permian-Triassic mass extinction event: Paleoecology of Lower Triassic carbonates in the western USA. Palaeogeography Palaeoclimatology Palaeoecology, vol. 116, p. 1-39.
    • (1995) Palaeogeography Palaeoclimatology Palaeoecology , vol.116 , pp. 1-39
    • Schubert, J.K.1    Bottjer, D.J.2
  • 44
    • 1942488767 scopus 로고
    • A new approach to the tectonics in the Ussuri (Wusuli) region
    • Shao, J., Wang, C. and Tang, K., 1992: A new approach to the tectonics in the Ussuri (Wusuli) region. Geological review, vol. 38, p. 33-39.
    • (1992) Geological Review , vol.38 , pp. 33-39
    • Shao, J.1    Wang, C.2    Tang, K.3
  • 45
    • 10644267146 scopus 로고
    • A note on the geology of the area around Kesennuma-cho
    • Contributions from the Institute of Geology and Paleontology Tohoku University
    • Shiida, I., 1940: A note on the geology of the area around Kesennuma-cho. Contributions from the Institute of Geology and Paleontology Tohoku University, vol. 33, p. 1-72.
    • (1940) , vol.33 , pp. 1-72
    • Shiida, I.1
  • 46
    • 0003132766 scopus 로고
    • Isocrinus columnals bearing limestones in Sambosan Belt and Japanese Triassic Isocrinus columnals
    • Memoirs of the Faculty of Education, Kumamoto University (Natural Science), (in Japanese with English Abstract)
    • Tamura, M. 1982: Isocrinus columnals bearing limestones in Sambosan Belt and Japanese Triassic Isocrinus columnals. Memoirs of the Faculty of Education, Kumamoto University (Natural Science), no. 31, p. 19-24. (in Japanese with English Abstract )
    • (1982) , Issue.31 , pp. 19-24
    • Tamura, M.1
  • 47
    • 0033213001 scopus 로고    scopus 로고
    • Palaeoenvironments and faunal recovery after the end-Permian mass extinction
    • Twitchett, R. J., 1999: Palaeoenvironments and faunal recovery after the end-Permian mass extinction. Palaeogiography Palaeoclimatology Palaeoecology, vol. 154, p. 27-37.
    • (1999) Palaeogiography Palaeoclimatology Palaeoecology , vol.154 , pp. 27-37
    • Twitchett, R.J.1
  • 48
    • 0030201427 scopus 로고    scopus 로고
    • Trace fossils and the aftermath of the Permo-Triassic mass extinction: Evidence from northern Italy
    • Twitchett, R. J. and Wignall, P. B., 1996: Trace fossils and the aftermath of the Permo-Triassic mass extinction: evidence from northern Italy. Palaeogeography Palaeoclimatology Palaeoecology, vol. 124, p. 137-151.
    • (1996) Palaeogeography Palaeoclimatology Palaeoecology , vol.124 , pp. 137-151
    • Twitchett, R.J.1    Wignall, P.B.2
  • 49
    • 0026443909 scopus 로고
    • Anoxia as a cause of the Permian/Triassic mass extinction: Facies evidence from northern Italy and the western United States
    • Geological Society of America, Boulder
    • Wignall, P. B. and Hallam, A., 1992: Anoxia as a cause of the Permian/Triassic mass extinction: facies evidence from northern Italy and the western United States. Palaeogeography Palaeoclimatology Palaeoecology, vol. 93, p. 21-46. Geological Society of America, Boulder.
    • (1992) Palaeogeography Palaeoclimatology Palaeoecology , vol.93 , pp. 21-46
    • Wignall, P.B.1    Hallam, A.2
  • 50
    • 0032694930 scopus 로고    scopus 로고
    • Lower Triassic large sea-floor carbonate cements: Their origin and a mechanism for the prolonged biotic recovery from the end-Permian mass extinction
    • Woods, A. D., Bottjer, D. J., Mutti, M., and Morrison, J., 1999: Lower Triassic large sea-floor carbonate cements: their origin and a mechanism for the prolonged biotic recovery from the end-Permian mass extinction. Geology, vol. 27, p. 645-648.
    • (1999) Geology , vol.27 , pp. 645-648
    • Woods, A.D.1    Bottjer, D.J.2    Mutti, M.3    Morrison, J.4
  • 51
    • 0019688316 scopus 로고
    • Palaeogiographical and stratigraphical distribution of the Lower Triassic Claraia and Eumorphotis (Bivalvia)
    • In Chinese with English abstract
    • Yin, H. F., 1981: Palaeogiographical and stratigraphical distribution of the Lower Triassic Claraia and Eumorphotis (Bivalvia). Acta Geologica Sinica, vol. 55, p. 161-169. (In Chinese with English abstract)
    • (1981) Acta Geologica Sinica , vol.55 , pp. 161-169
    • Yin, H.F.1
  • 52
    • 0022248858 scopus 로고
    • Bivalves near the Permian-Triassic boundary in South China
    • Yin, H. F., 1985: Bivalves near the Permian-Triassic boundary in South China. Journal of Paleontology, vol. 59, p. 572-600.
    • (1985) Journal of Paleontology , vol.59 , pp. 572-600
    • Yin, H.F.1


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