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A Middle Jurassic (Bajocian) ophthalmosaurid (Reptilia, Ichthyosauria) from the Tuxedni Formation, Alaska and the early diversification of the clade

Published online by Cambridge University Press:  04 April 2013

PATRICK S. DRUCKENMILLER  and
ERIN E. MAXWELL
PATRICK S. DRUCKENMILLER*
Affiliation:
University of Alaska Museum and Department of Geology and Geophysics, University of Alaska Fairbanks, 907 Yukon Dr., Fairbanks, AK 99775
ERIN E. MAXWELL
Affiliation:
Paläontologisches Institut und Museum, Universität Zürich, Karl-Schmid Strasse 4, 8006 Zürich, Switzerland
*
†Author for correspondence: psdruckenmiller@alaska.edu
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Abstract

Ophthalmosauridae is a clade of derived thunniform ichthyosaurs that are best known from Callovian (late Middle Jurassic) to Cenomanian-aged (Late Cretaceous) deposits in both the Northern and Southern Hemispheres. Ophthalmosaurids arose prior to the Early–Middle Jurassic boundary, however, very little is known about their diversity and distribution in the earliest phase of their evolutionary history during the Aalenian–Bathonian (Middle Jurassic) interval. Here we describe new diagnostic ophthalmosaurid material from the Early Bajocian (Middle Jurassic) of Alaska. The specimen, UAMES 3411, is a partial disarticulated skull that was discovered in the Middle Jurassic Tuxedni Formation, which was deposited in shallow marine settings outboard of the then-accreting Wrangellia composite terrane. The new material is significant in that it is the first Jurassic ichthyosaur described from Alaska, one of the oldest ophthalmosaurids known and the only Middle Jurassic ophthalmosaurid described from the Northern Hemisphere. The new material adds to a rapidly growing data set on ophthalmosaurid diversity and suggests that the clade was geographically widespread by the Early Bajocian, very early in its evolutionary history.

Keywords

Talkeetna MountainsOphthalmosaurinaepalaeobiogeographysystematics
Type
Original Articles
Information
Geological Magazine , Volume 151 , Issue 1 , January 2014 , pp. 41 - 48
Copyright
Copyright © Cambridge University Press 2013 

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References

Appleby, R. M. 1956. The osteology and taxonomy of the fossil reptile Ophthalmosaurus . Proceedings of the Zoological Society of London 16, 403–47.Google Scholar
Bardet, N. 1994. Extinction events among Mesozoic marine reptiles. Historical Biology 7, 313–24.Google Scholar
Baur, G. 1887. Über den Ursprung der Extremitäten der Ichthyopterygia. Jahresberichte und Mitteilungen des Oberrheinischen geologischen Vereines 20, 17–20.Google Scholar
Benson, R. B. J. & Butler, R. J. 2011. Uncovering the diversification history of marine tetrapods: ecology influences the effect of geological sampling biases. In Comparing the Geological and Fossil Records: Implications for Biodiversity Studies (eds McGowan, A. & Smith, A.), pp. 191–208. Geological Society of London, Special Publication no. 358.Google Scholar
Benson, R. B. J., Butler, R. J., Lindgren, J. & Smith, A. S. 2010. Mesozoic marine tetrapod diversity: mass extinctions and temporal heterogeneity in geological megabiases affecting vertebrates. Proceedings of the Royal Society B 277, 829–34.Google Scholar
Blainville, H. M. de 1835. Description de quelques espèces de reptiles de la Californie, précédé de l'analyse d'un système général d'erpétologie et d'amphibiologie. Nouvelles Annales du Muséum d'Histoire Naturelle, Paris 4, 233–96.Google Scholar
Detterman, R. L. 1963. Revised stratigraphic nomenclature and age of the Tuxedni Group in the Cook Inlet region, Alaska. US Geological Survey Professional Paper 475-C, C30–4.Google Scholar
Detterman, R. L. & Reed, B. L. 1980. Stratigraphy, structure and economic geology of the Iliamna Quadrangle, Alaska. US Geological Survey Bulletin 1368-B, B1–86.Google Scholar
Druckenmiller, P. S., Hurum, J. H., Knutsen, E. M. & Nakrem, H. A. 2012. Two new ophthalmosaurids (Reptilia: Ichthyosauria) from the Agardhfjellet Formation (Upper Jurassic: Volgian/Tithonian), Svalbard, Norway. Norwegian Journal of Geology 92, 311–39.Google Scholar
Druckenmiller, P. S. & Maxwell, E. E. 2010. A new Lower Cretaceous (lower Albian) ichthyosaur from the Clearwater Formation, Alberta, Canada. Canadian Journal of Earth Sciences 47, 1037–53.Google Scholar
Fernández, M. S. 1994. A new long-snouted ichthyosaur from the Early Bajocian of Neuquén Basin (Argentina). Ameghiniana 31, 291–97.Google Scholar
Fernández, M. S. 1999. A new ichthyosaur from the Los Molles Formation (Early Bajocian), Neuquen Basin, Argentina. Journal of Paleontology 73, 677–81.Google Scholar
Fernández, M. S. 2003. Ophthalmosauria (Ichthyosauria) forefin from the Aalenian–Bajocian boundary of Mendoza Province, Argentina. Journal of Vertebrate Paleontology 23, 691–94.Google Scholar
Fernández, M. S. 2007 a. Ichthyosauria. In Patagonian Mesozoic Reptiles (eds Gasparini, Z., Salgado, L. & Coria, R.), pp. 271–91. Indiana University Press.Google Scholar
Fernández, M. S. 2007 b. Redescription and phylogenetic position of Caypullisaurus (Ichthyosauria: Ophthalmosauridae). Journal of Paleontology 81, 368–75.Google Scholar
Fischer, V., Arkhangelsky, M. S., Uspensky, G. N., Stenshin, I. M. & Godroit, P. 2013. A new Lower Cretaceous ichthyosaur from Russia reveals skull shape conservatism within Ophthalmosaurinae. Geological Magazine, 151, 60–70.Google Scholar
Fischer, V., Maisch, M. W., Naish, D., Kosma, R., Liston, J., Joger, U., Krüger, F. J., Pardo Pérez, J., Tainsh, J. & Appleby, R. M. 2012. New ophthalmosaurid ichthyosaurs from the European Lower Cretaceous demonstrate extensive ichthyosaur survival across the Jurassic–Cretaceous boundary. PLoS ONE 7, e29234. doi:10.1371/journal.pone.0029234.CrossRefGoogle ScholarPubMed
Fischer, V., Masure, E., Arkhangelsky, M. S. & Godefroit, P. 2011. A new Barremian (Early Cretaceous) ichthyosaur from Western Russia. Journal of Vertebrate Paleontology 31, 1010–25.Google Scholar
Fraas, E. 1891. Ichthyosaurier der süddeutschen Trias- und Jura- Ablagerungen. Tübingen: H. Laupp.Google Scholar
Gasparini, Z. & Fernández, M. S. 2006. Middle and late Jurassic marine reptile faunas of the southeastern Pacific, based on discoveries in Argentina and Chile. Paludicola 5, 230–41.Google Scholar
Gradstein, F., Ogg, J. G., Schmitz, M. A. & Ogg, G. 2012. The Geologic Time Scale 2012. Elsevier, 1176 pp.Google Scholar
Gradstein, F. M., Ogg, J. G. & Smith, A. G. 2004. A Geologic Time Scale 2004. Cambridge University Press, 610 pp.Google Scholar
Huene, F. von 1922. Die Ichthyosaurier des Lias und ihre Zusammenhänge. Berlin: Verlag von Gebrüder Borntraeger.Google Scholar
Imlay, R. W. 1961. New genera and subgenera of Jurassic (Bajocian) ammonites from Alaska. Journal of Paleontology 35, 467–74.Google Scholar
Imlay, R. W. 1964. Middle Bajocian ammonites from the Cook Inlet region, Alaska. US Geological Survey Professional Paper 418-B, 1–61.Google Scholar
Kirton, A. M. 1983. A Review of British Upper Jurassic ichthyosaurs. PhD thesis, University of Newcastle upon Tyne, UK. Published thesis.Google Scholar
Maisch, M. W. 1998. Kurze Übersicht der Ichthyosaurier des Posidonienschiefers mit Bemerkungen zur Taxonomie der Stenopterygiidae und Temnodontosauridae. Neues Jahrbuch für Geologie und Paläontologie Abhandlungen 209, 401–31.Google Scholar
Maisch, M. W. & Matzke, A. T. 2000. The Ichthyosauria. Stuttgarter Beiträge zur Naturkunde Serie B (Geologie und Paläontologie) 298, 1–159.Google Scholar
Massare, J. A., Buchholtz, E. A., Kenney, J. M. & Chomat, A.-M. 2006. Vertebral morphology of Ophthalmosaurus natans (Reptilia: Ichthyosauria) from the Jurassic Sundance Formation of Wyoming. Paludicola 5, 242–54.Google Scholar
Maxwell, E. E. 2010. Generic reassignment of an ichthyosaur from the Queen Elizabeth Islands, Northwest Territories, Canada. Journal of Vertebrate Paleontology 30, 403–15.Google Scholar
Maxwell, E. E. & Caldwell, M. W. 2006. A new genus of ichthyosaur from the Lower Cretaceous of Western Canada. Palaeontology 49, 1043–52.Google Scholar
Maxwell, E. E., Fernández, M. S. & Schoch, R. R. 2012. First diagnostic marine reptile remains from the Aalenian (Middle Jurassic): a new ichthyosaur from southwestern Germany. PLoS ONE 7, e41692. doi:10.1371/journal.pone.0041692.Google Scholar
McGowan, C. 1972. The systematics of Cretaceous ichthyosaurs with particular reference to the material from North America. Contributions to Geology 11, 9–29.Google Scholar
McGowan, C. 1973. The cranial morphology of the Lower Liassic latipinnate ichthyosaurs of England. Bulletin of the British Museum (Natural History) 24, 1–109.Google Scholar
McGowan, C. 1976. The description and phenetic relationships of a new ichthyosaur genus from the Upper Jurassic of England. Canadian Journal of Earth Sciences 13, 668–83.Google Scholar
McGowan, C. & Motani, R. 2003. Ichthyopterygia. Handbook of Paleoherpetology part 8, Verlag Dr. Friedrich Pfeil, 173 pp.Google Scholar
Motani, R. 1999. Phylogeny of the Ichthyopterygia. Journal of Vertebrate Paleontology 19, 472–95.Google Scholar
Plafker, G. & Berg, H. C. 1994. Overview of the geology and tectonic evolution of Alaska. In The Geology of Alaska (eds Plafker, G. & Berg, H. C.), pp. 989–1021. The Geological Society of America.Google Scholar
Quenstedt, F. A. 1856–1858. Der Jura. Tübingen: H. Laupp.Google Scholar
Schaff, R. G. & Gilbert, W. G. 1987. Southern Alaska Region Correlation Chart. American Association of Petroleum Geologists, Sheet 1.Google Scholar
Trop, J. M., Szuch, D. A., Rioux, M. & Blodgett, R. B. 2005. Sedimentology and provenance of the Upper Jurassic Naknek Formation, Talkeetna Mountains, Alaska: bearings on the accretionary history of the Wrangellia composite terrane. Geological Society of America Bulletin 117, 570–88.Google Scholar
Trop, J. M. & Ridgway, K. D. 2007. Mesozoic and Cenozoic tectonic growth of southern Alaska: a sedimentary basin perspective. In Tectonic Growth of a Collisional Continental Margin: Crustal Evolution of Southern Alaska (eds Ridgway, K. D., Trop, J. M., Glen, J. M. G. & O'Neill, J. M.), pp. 55–94. Geological Society of America Special Paper no. 431.Google Scholar
Westermann, G. 1954. Monographie der Otoitidae (Ammonoidea). Geologische Jahrbuch Beihefte 15, 1–364.Google Scholar
Winkler, G. R. 1992. Geologic map and summary geochronology of the Anchorage 1° x 3° quadrangle, southern Alaska. US Geological Survey Miscellaneous Investigations Series Map 2283, 1 sheet, scale 1: 250000.Google Scholar