Results 11 to 20 of about 265 (99)

REDESCRIPTION AND PHYLOGENETIC POSITION OF CAYPULLISAURUS (ICHTHYOSAURIA: OPHTHALMOSAURIDAE) [PDF]

Journal of Paleontology, 2007
Abstract The ophthalmosaurid Caypullisaurus from the Late Jurassic–Early Cretaceous of the Neuquen Basin, Argentina, is redescribed based on new information from recent discoveries. Cladistic analysis of Caypullisaurus, based on previous ichthyopterygian data sets and using NONA, yielded two most parsimonious trees. Two clades are recognized within the
Marta S Fernández
exaly   +6 more sources

An Upper Jurassic ichthyosaur (Ichthyosauria: Ophthalmosauridae) from the Bowser Basin, British Columbia [PDF]

Canadian Journal of Earth Sciences, 2016
Although the Jurassic was a period of high diversity in ichthyosaurs, only a small number of specimens have been recorded from Canada to date. We describe here a new occurrence of an ophthalmosaurid ichthyosaur from a shallow marine depositional environment within the Bowser Basin of northern British Columbia. Based on vertebral diameters and the size
Michael W Caldwell, Carol A Evenchick, Donald B Brinkman   +2 more
exaly   +3 more sources

A new species of Platypterygius (Ophthalmosauridae) from the lower Barremian of Colombia and assessment of the species composition of the genus

Earth Sciences Research Journal
In this paper, we describe a new ophthalmosaurid specimen found in the lower Barremian beds of the Paja Formation at Villa de Leiva, Boyacá, Colombia. The specimen represents a new species of Platypterygius, P. elsuntuoso sp. nov. defined by three unique features within the genus: a small ventral peg in the anterior ventral border of the extracondylar ...
María Eurídice Páramo Fonseca, Cristian David Benavides Cabra, Renzo Garavito Camacho   +2 more
exaly   +3 more sources

Variación Ontogenética en la Histología Ósea deCaypullisaurus BonaparteiFernández, 1997 (Ichthyosauria: Ophthalmosauridae) [PDF]

Ameghiniana, 2012
Fil: Talevi, Marianella. Universidad Nacional de Río Negro. Instituto de Investigación en Paleobiología y Geología. Río Negro, Argentina.Fil: Fernández, Marta S. Universidad Nacional de La Plata. Museo de La Plata.
Marianella Talevi, Marta S Fernández, Leonardo Salgado   +2 more
exaly   +6 more sources

Re-appearance of hypercarnivore ichthyosaurs in the Cretaceous with differentiated dentition: revision of ‘Platypterygius’ sachicarum (Reptilia: Ichthyosauria, Ophthalmosauridae) from Colombia [PDF]

Journal of Systematic Palaeontology, 2021
Early Cretaceous ichthyosaur diversity has markedly increased in recent years with the discovery of new taxa in the field and in museum collections. This has led to new characters, and a better understanding of taxonomically informative anatomy. Here, we re-describe the holotype of the ophthalmosaurid Platypterygius sachicarum from the Barremian–Aptian
Dirley Cortés, Erin E. Maxwell, Hans C. E. Larsson   +2 more
openaire   +2 more sources

Ichthyosaurs from the Early Cretaceous (Hauterivian - Barremian) from the western border of the Tyndall Glacier in the Torres del Paine National Park, Southernmost Chile [PDF]

Journal of Vertebrate Paleontology, 2015
Three field campaigns to the eastern lobe of the Tyndall Glacier in the Torres del Paine National Park, southern Chile, allowed us to record 46 specimens of ichthyosaurs, which are almost completely exposed and articulated, as well as several associated ...
Pardo Pérez, Judith Mariana
core   +3 more sources

First diagnostic marine reptile remains from the Aalenian (Middle Jurassic): a new ichthyosaur from southwestern Germany. [PDF]

PLoS One, 2012
Background: The Middle Jurassic was a critical time in the evolutionary history of ichthyosaurs. During this time interval, the diverse, well-studied faunas of the Lower Jurassic were entirely replaced by ophthalmosaurids, a new group that arose sometime
Maxwell EE, Fernández MS, Schoch RR.
europepmc   +6 more sources

New data on the ichthyosaur Platypterygius hercynicus and its implications for the validity of the genus [PDF]

, 2011
The description of a nearly complete skull from the late Albian of northwestern France reveals previously unknown anatomical features of Platypterygius hercynicus (Kuhn 1946), and of European Cretaceous ichthyosaurs in general.
Appleby R.M., Arkhangelsky M.S., Arkhangelsky M.S., Bardet N., Bardet N., Bardet N., Bardet N., Broili F., Buffetaut E., Capellini G., Debris J.-P., Debris J.-P., Efimov V.M., Efimov V.M., Fernández M., Fernández M., Fernández M., Fernández M., Fischer V., Fischer V., Fischer V., Kiprijanoff W., Kolb C., Kuhn O., Maisch M.W., Maisch M.W., Maisch M.W., Maxwell E.E., Maxwell E.E., McGowan C., Motani R., Motani R., Paramo M.E., Romer A.S., Sander P.M., Valentin Fischer, Wade M., Zammit M.   +37 more
core   +3 more sources

Early high rates and disparity in the evolution of ichthyosaurs. [PDF]

Commun Biol, 2020
How clades diversify early in their history is integral to understanding the origins of biodiversity and ecosystem recovery following mass extinctions. Moreover, diversification can represent evolutionary opportunities and pressures following ecosystem ...
Moon BC, Stubbs TL.
europepmc   +4 more sources

A large new Middle Jurassic ichthyosaur shows the importance of body size evolution in the origin of the Ophthalmosauria. [PDF]

BMC Ecol Evol
The Middle Jurassic is an important time period for the evolutionary history of marine reptiles as it represented a transitional phase for many clades. Notably, in ichthyosaurs, many early parvipelvian taxa went extinct.
Miedema F, Bastiaans D, Scheyer TM, Klug C, Maxwell EE.   +4 more
europepmc   +3 more sources