Skip to main content
×
Home
    • Aa
    • Aa
  • Get access
    Check if you have access via personal or institutional login
  • Cited by 2
  • Cited by
    This article has been cited by the following publications. This list is generated based on data provided by CrossRef.

    Fischer, Valentin Bardet, Nathalie Benson, Roger B. J. Arkhangelsky, Maxim S. and Friedman, Matt 2016. Extinction of fish-shaped marine reptiles associated with reduced evolutionary rates and global environmental volatility. Nature Communications, Vol. 7, p. 10825.


    Sissons, Robin L. Caldwell, Michael W. Evenchick, Carol A. Brinkman, Donald B. Vavrek, Matthew J. and Sues, Hans-Dieter 2016. An Upper Jurassic ichthyosaur (Ichthyosauria: Ophthalmosauridae) from the Bowser Basin, British Columbia. Canadian Journal of Earth Sciences, Vol. 53, Issue. 1, p. 34.


    ×

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

  • PATRICK S. DRUCKENMILLER (a1) and ERIN E. MAXWELL (a2)
  • DOI: http://dx.doi.org/10.1017/S0016756813000125
  • Published online: 04 April 2013
Abstract
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.

Copyright
Corresponding author
Author for correspondence: psdruckenmiller@alaska.edu
Linked references
Hide All

This list contains references from the content that can be linked to their source. For a full set of references and notes please see the PDF or HTML where available.

N. Bardet 1994. Extinction events among Mesozoic marine reptiles. Historical Biology 7, 313–24.

R. B. J. Benson , R. J. Butler , J. Lindgren & A. S. Smith 2010. Mesozoic marine tetrapod diversity: mass extinctions and temporal heterogeneity in geological megabiases affecting vertebrates. Proceedings of the Royal Society B 277, 829–34.

M. S. Fernández 1999. A new ichthyosaur from the Los Molles Formation (Early Bajocian), Neuquen Basin, Argentina. Journal of Paleontology 73, 677–81.

M. S. Fernández 2003. Ophthalmosauria (Ichthyosauria) forefin from the Aalenian–Bajocian boundary of Mendoza Province, Argentina. Journal of Vertebrate Paleontology 23, 691–94.


V. Fischer , M. S. Arkhangelsky , G. N. Uspensky , I. M. Stenshin & P. Godroit 2013. A new Lower Cretaceous ichthyosaur from Russia reveals skull shape conservatism within Ophthalmosaurinae. Geological Magazine, 151, 6070.

V. Fischer , M. W. Maisch , D. Naish , R. Kosma , J. Liston , U. Joger , F. J. Krüger , J. Pardo Pérez , J. Tainsh & R. M. Appleby 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.

V. Fischer , E. Masure , M. S. Arkhangelsky & P. Godefroit 2011. A new Barremian (Early Cretaceous) ichthyosaur from Western Russia. Journal of Vertebrate Paleontology 31, 1010–25.

E. E. Maxwell 2010. Generic reassignment of an ichthyosaur from the Queen Elizabeth Islands, Northwest Territories, Canada. Journal of Vertebrate Paleontology 30, 403–15.

E. E. Maxwell & M. W. Caldwell 2006. A new genus of ichthyosaur from the Lower Cretaceous of Western Canada. Palaeontology 49, 1043–52.

E. E. Maxwell , M. S. Fernández & R. R. Schoch 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.

C. McGowan 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.

R. Motani 1999. Phylogeny of the Ichthyopterygia. Journal of Vertebrate Paleontology 19, 472–95.

J. M. Trop , D. A. Szuch , M. Rioux & R. B. Blodgett 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.

Recommend this journal

Email your librarian or administrator to recommend adding this journal to your organisation's collection.

Geological Magazine
  • ISSN: 0016-7568
  • EISSN: 1469-5081
  • URL: /core/journals/geological-magazine
Please enter your name
Please enter a valid email address
Who would you like to send this to? *
×

Keywords: