Results 71 to 80 of about 1,197 (196)

Do cladistic and morphometric data capture common patterns of morphological disparity? [PDF]

, 2015
The distinctly non-random diversity of organismal form manifests itself in discrete clusters of taxa that share a common body plan. As a result, analyses of disparity require a scalable comparative framework.
Adams, Alexander J. Hetherington, Bookstein, Bradley Deline, Briggs, Brusatte, Brusatte, Butler, De Cáceres, Emma Sherratt, Foote, Forey, Foth, Hawkins, Hawkins, Kenneth Angielczyk, Klingenberg, Klingenberg, Klingenberg, Maddison, Marcello Ruta, Mark Wilkinson, O'Higgins, Olson, Peres-Neto, Philip C. J. Donoghue, Pinna, Prentice, Sherratt, Smith, Taylor, Thorne, Villier, Wake, Wiley, Wilkinson, Wilkinson, Wilkinson, Wills, Wills, Wills   +40 more
core   +5 more sources

COMMENTS ON TRIASSIC PTEROSAURS WITH A COMMENTARY ON THE "ONTOGENETIC STAGES" OF KELLNER (2015) AND THE VALIDITY OF BERGAMODACTYLUS WILDI

Rivista Italiana di Paleontologia e Stratigrafia, 2018
Six stages (OS1-6) were identified by Kellner (2015) to establish the ontogeny of a given pterosaur fossil. These were used to support the erection of several new Triassic taxa including Bergamodactylus wildi, which is based on a single specimen (MPUM ...
FABIO M. DALLA VECCHIA
doaj   +1 more source

Egg shape changes at the theropod–bird transition, and a morphometric study of amniote eggs [PDF]

, 2014
The eggs of amniotes exhibit a remarkable variety of shapes, from spherical to elongate and from symmetrical to asymmetrical. We examine eggshell geometry in a diverse sample of fossil and living amniotes using geometric morphometrics and linear ...
Abramoff MD, Anderson MJ, Ewert MA, Ferguson MWJ, Gunz P, Hammer Ø, Hutchinson JMC, MacLeod N, Manolis SC, Mikhailov KE, Miller JD, Rohlf FJ, Romanoff AL, Romanoff AL, Vleck CM   +14 more
core   +1 more source

New azhdarchoid pterosaur (Pterosauria, Pterodactyloidea) with an unusual lower jaw from the Portezuelo Formation (Upper Cretaceous), Neuquén Group, Patagonia, Argentina

Anais da Academia Brasileira de Ciências, 2017
A new azhdarchoid pterosaur from the Upper Cretaceous of Patagonia is described. The material consists of an incomplete edentulous lower jaw that was collected from the upper portion of the Portezuelo Formation (Turonian-Early Coniacian) at the ...
ALEXANDER W.A. KELLNER, JORGE O. CALVO
doaj   +1 more source

Extending the Geographic Range of Pterosaurs in the Araripe Basin: First Record from the Romualdo Formation (Araripe Basin) in Piauí, Brazil [PDF]

Anais da Academia Brasileira de Ciências
The Araripe Basin in northeastern Brazil is a key site for Cretaceous pterosaur fossils from Gondwanan deposits. Most discoveries are concentrated in its northern portion, particularly in Ceará state, within the Crato and Romualdo formations. In contrast,
RENAN A.M. BANTIM, ESAÚ V. DE ARAÚJO, ARTUR F.S. ARAÚJO, FLAVIANA J. DE LIMA, JULIANA M. SAYÃO, PAULO V. DE OLIVEIRA   +5 more
doaj   +1 more source

Preliminary observations on the bone histology of the Middle Triassic pseudosuchian archosaur Batrachotomus kupferzellensis reveal fast growth with laminar fibrolamellar bone tissue [PDF]

, 2017
The bone tissue of femur, rib, and gastralia from three different individuals of the Middle Triassic pseudosuchian Batrachotomus kupferzellensis from southern Germany is studied.
Foth, Christian, Klein, Nicole, Schoch, Rainer R.   +2 more
core   +1 more source

A new toothless pterosaur (Pterodactyloidea) from Southern Brazil with insights into the paleoecology of a Cretaceous desert

Anais da Academia Brasileira de Ciências
Abstract: The first pterosaur bone bed from Brazil was reported in 2014 at the outskirts of the town Cruzeiro do Oeste, Paraná State, in the Southern region of the country. Here named 'cemitério dos pterossauros' site, these outcrops were referred to the
ALEXANDER W.A. KELLNER, LUIZ C. WEINSCHÜTZ, BORJA HOLGADO, RENAN A.M. BANTIM, JULIANA M. SAYÃO   +4 more
doaj   +1 more source

The Evolution of Pneumatic Foramina in Pterosaur Vertebrae

Anais da Academia Brasileira de Ciências, 2019
: Pterosaurs possess skeletal pneumatization, which can be assessed externally through the observation of pneumatic foramina. These foramina vary in position, shape, and number among taxa.
RICHARD BUCHMANN, TAISSA RODRIGUES
doaj   +1 more source

Rise of Dinosaurs Reveals Major Body-Size Transitions Are Driven by Passive Processes of Trait Evolution [PDF]

, 2012
A major macroevolutionary question concerns how long-term patterns of body-size evolution are underpinned by smaller scale processes along lineages.
Benson, Roger B. J., Butler, Richard J., Sookias, Roland B.   +2 more
core   +1 more source

Eggshell and Histology Provide Insight on the Life History of a Pterosaur with Two Functional Ovaries

Anais da Academia Brasileira de Ciências, 2015
The counterpart of a previously described non-pterodactyloid pterosaur with an egg revealed the presence of a second egg inside the body cavity of this gravid female.
XIAOLIN WANG, ALEXANDER W. A. KELLNER, XIN CHENG, SHUNXING JIANG, QIANG WANG, JULIANA M. SAYÃO, TAISSA RODRIGUES, FABIANA R. COSTA, NING LI, XI MENG, ZHONGHE ZHOU   +10 more
doaj   +1 more source