Locomotory capabilities in the Early Cretaceous ichthyosaur Platypterygius australis based on osteological comparisons with extant marine mammals

  title={Locomotory capabilities in the Early Cretaceous ichthyosaur Platypterygius australis based on osteological comparisons with extant marine mammals},
  author={Maria Zammit and Benjamin P. Kear and Rachel M. Norris},
  journal={Geological Magazine},
  pages={87 - 99}
Abstract Reconstructing the swimming capabilities of extinct marine tetrapods is critical for unravelling broader questions about their palaeobiology, palaeoecology and palaeobiogeography. Ichthyosaurs have long been the subject of such investigations because, alongside cetaceans, they are one of the few tetrapod lineages to achieve a highly specialized fish-like body plan. The dominant locomotory mode for the majority of derived, post-Triassic ichthyosaurs is hypothesized to have been caudal… 

A palaeobiogeographical synthesis of Australasian Mesozoic marine tetrapods

Kear, B.P., Fordyce, R.E., Hiller, N. & Siversson, M., December 2017. A palaeobiogeographical synthesis of Australasian Mesozoic marine tetrapods. Alcheringa 42, 461-486. ISSN 0311-5518. THE LAST 15

New perspectives on ancient marine reptiles

  • B. KearG. Budd
  • Environmental Science, Geography
    Geological Magazine
  • 2013
Amniotes first invaded saline lagoons and coastal seaways towards the end of the Palaeozoic (Early Permian, ~ 280 Ma: Piñeiro et al. 2012), but by the dawn of the Mesozoic (Early–Middle Triassic, ~

Cretaceous marine amniotes of Australia: perspectives on a decade of new research

  • B. Kear
  • Environmental Science, Geography
  • 2016
Kear, B.P. 2016. Cretaceous marine amniotes of Australia: perspectives on a decade of new research. Memoirs of Museum Victoria 74: 17–28. Cretaceous marine amniote fossils have been documented from

Vertebral size ratios and the ichthyosaurian vertebral column – a case study based on Late Jurassic fossils from North-East Greenland

Vertebral centra are some of the most common fossils from ichthyosaurs and thus valuable for understanding these marine reptiles. This study sets out to provide further information on the dimensional

Reply to “Ichthyosaur embryos outside the mother body: not due to carcass explosion but to carcass implosion” by van Loon (2013)

In his recent discussion on the taphonomy of ichthyosaurs, van Loon (2013) supported—at least partially—the view of Reisdorf et al. (2012) and emphasized that explosion of vertebrate carcasses on the

Can vertebral remains differentiate more than one species of Australian Cretaceous ichthyosaur?

Abstract All currently described Cretaceous ichthyosaur remains in Australia have been referred to the single taxon Platypterygius australis M’Coy 1867, primarily on the basis of skull morphology.



Cranial morphology of Platypterygius longmani Wade, 1990 (Reptilia : Ichthyosauria) from the Lower Cretaceous of Australia.

Preparation of specimens using acetic acid and application of high-resolution X-ray computed tomographic analyses has revealed many previously unrecorded anatomical details, including the absence of a coronoid and squamosal, and the presence of well-developed epipterygoids facets on the pterygoid and parietal.

In utero foetal remains of the Cretaceous ichthyosaurian Platypterygius: ontogenetic implications for character state efficacy

Ontogenetic continuity amongst the majority of other phylogenetically pertinent skeletal structures advocates their application for cladistic analyses, and suggests that many classic characters used to differentiate Platypterygius remain diagnostic irrespective of growth stage.

Postcranial Anatomy of Platypterygius americanus (Reptilia: Ichthyosauria) from the Cretaceous of Wyoming

Comparative assessment suggests that Platypterygius americanus is a valid taxon, and that it is possible to differentiate the various Platyperygius spp.

The Australian Cretaceous Ichthyosaur Platypterygius australis: A Description and Review of Postcranial Remains

Postcranial remains referred to the upper Albian species Platypterygius australis are described, including the first record of pelvic and hind limb elements for this taxon, among the most complete in the world.

Two new ophthalmosaurids (Reptilia: Ichthyosauria) from the Agardhfjellet Formation (Upper Jurassic: Volgian/Tithonian), Svalbard, Norway

Two recently collected specimens of medium- to large-bodied ichthyosaurs from the Slottsmoya Member of the Agardhfjellet, Svalbard, Norway represent two new taxa of ophthalmosaurids.

A new Lower Cretaceous (lower Albian) ichthyosaur genus from the Clearwater Formation, Alberta, Canada

A new, articulated skeleton of an ichthyosaur from the Lower Cretaceous (lower Albian) Wabiskaw Member of the Clearwater Formation near Fort McMurray, Alberta, is the most complete and

Lines of Phyletic and Biological Development of the Ichthyopterygia

  • F. Huene
  • Environmental Science, Geography
  • 1923
Introduction The great order of the Ichthyopterygia, known from Permian to Upper Cretaceous times, is formed by the Ichthyosauria, Omphalosauria, and Mesosauria. A special study of all Liassic

A review of Australasian ichthyosaurs

Ichthyosaur fossils have been recorded from four landmasses in the Australasian region—Australia, New Zealand, New Caledonia and Timor—and occur in all three systems of the Mesozoic. Most of the

Platypterygius australis, an Australian Cretaceous ichthyosaur

Sufficient material has been assembled to restore the powerful pectoral girdle and large fore limbs of Platypterygius australis (M'Coy). A reasonable approximation to the line of action of dorsal and

Cretaceous marine reptiles of Australia: a review of taxonomy and distribution

  • B. Kear
  • Environmental Science, Geography
  • 2003