Zurich Open Repository and Archive University of Zurich Main Library Strickhofstrasse 39 CH-8057 Zurich www.zora.uzh.ch Year: 2013 A New Paleoecological look at the Dinwoody Formation (Lower Triassic, Western USA): Intrinsic Versus Extrinsic Controls on Ecosystem Recovery After the End-Permian Mass Extinction Hofmann, Richard ; Hautmann, Michael ; Bucher, Hugo DOI: https://doi.org/10.1666/12-153 Posted at the Zurich Open Repository and Archive, University of Zurich ZORA URL: https://doi.org/10.5167/uzh-81033 Journal Article Published Version Originally published at: Hofmann, Richard; Hautmann, Michael; Bucher, Hugo (2013). A New Paleoecological look at the Din- woody Formation (Lower Triassic, Western USA): Intrinsic Versus Extrinsic Controls on Ecosystem Recovery After the End-Permian Mass Extinction. Journal of Paleontology, 87(5):854-880. DOI: https://doi.org/10.1666/12-153 Journal of Paleontology, 87(5), 2013, p. 854–880 Copyright Ó 2013, The Paleontological Society 0022-3360/13/0087-854$03.00 DOI: 10.1666/12-153 A NEW PALEOECOLOGICAL LOOK AT THE DINWOODY FORMATION (LOWER TRIASSIC, WESTERN USA): INTRINSIC VERSUS EXTRINSIC CONTROLS ON ECOSYSTEM RECOVERY AFTER THE END-PERMIAN MASS EXTINCTION RICHARD HOFMANN, MICHAEL HAUTMANN, AND HUGO BUCHER Pala¨ontologisches Institut und Museum, Universita¨tZu¨rich, Karl-Schmid-Strasse 4, 8006 Zu¨rich, Switzerland, ,
[email protected].; ,
[email protected].; and ,
[email protected]. ABSTRACT—The Dinwoody Formation of the western United States represents an important archive of Early Triassic ecosystems in the immediate aftermath of the end-Permian mass extinction. We present a systematic description and a quantitative paleoecological analysis of its benthic faunas in order to reconstruct benthic associations and to explore the temporal and spatial variations of diversity, ecological structure and taxonomic composition throughout the earliest Triassic of the western United States.