62 research outputs found

    <i>Prorotodactylus mesaxonichnus</i> isp. nov. tracks IV.

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    <p>(A) Manus-pes set with the 3D model and ichnites outline. (B-N) Isolated sets, manus and pes tracks with different states of preservation. (O) Pes track with digit scratches and large pes with prevalence of digits II, III and IV. Note the characteristic hooked digit tips (D-G), tracks resembling <i>Rhynchosauroides</i> due to the dragging of digit tips (E, I). All tracks scaled at 10 mm except the manus in (B), which is at 5 mm. All tracks are from Tossal de Pollerini site (Erillcastell).</p

    A new extreme longirostrine temnospondyl from the Triassic of Madagascar: phylogenetic and palaeobiogeographical implications for trematosaurids

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    <p>Trematosaurids form a very large and remarkable clade of Triassic tetrapods (Temnospondyli: Stereospondyli) with a worldwide geographical distribution. Compared with specimens from Europe, Australia or North America, they remain relatively scarce in African rocks, where they are mainly known in the Early Triassic of Madagascar and South Africa. Longirostrine trematosaurids were only known from Madagascar, represented by the genus <i>Wantzosaurus</i>. However, we describe herein a new species of the longirostrine trematosaurid <i>Aphaneramma</i>, <i>Aphaneramma gavialimimus</i> sp. nov., from the Olenekian (Lower Triassic) of Madagascar. This genus was previously known from the Early Triassic of Europe and Asia. Based on a new nearly complete skull, the new species is characterized by a premaxilla-nasal suture anteriorly directed, not contacting the nostrils; choanae completely included within the palatines; the ventral opening of the orbits in the anterior part of the interpterygoid vacuities; a very elongated nasal covering more than 50% of the prenarial length; and an anteriorly widened cultriform process. <i>Aphaneramma gavialimimus</i> sp. nov., with a skull length of about 40 cm, may be one of the largest known trematosaurids. Its inclusion in a new phylogenetic analysis confirms its close affinities with the North American genus <i>Cosgriffius</i>, and clarifies the relationships of trematosaurids in general and lonchorhynchines in particular. The new species also increases the palaeobiodiversity of marine trematosaurs in Gondwana and allows discussing their apparently rapid cosmopolitanism just after the great Permian–Triassic mass extinction.</p> <p><a href="http://zoobank.org/urn:lsid:zoobank.org:pub:6992EB6B-5708-4226-860D-47982CFB7F22" target="_blank">http://zoobank.org/urn:lsid:zoobank.org:pub:6992EB6B-5708-4226-860D-47982CFB7F22</a></p

    Impact of charge carrier transport and electrode selectivity on the performance of organic solar cells: Presentation held at European Materials Research Society, E-MRS Fall Meeting 2016, Warsaw, Poland, September 19 to 22, 2016

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    <p>(A) Manus-pes set with the 3D model and ichnites outline. (B-N) Isolated sets, manus and pes tracks with different states of preservation. (O) Pes track with digit scratches and large pes with prevalence of digits II, III and IV. Note the characteristic hooked digit tips (D-G), tracks resembling <i>Rhynchosauroides</i> due to the dragging of digit tips (E, I). All tracks scaled at 10 mm except the manus in (B), which is at 5 mm. All tracks are from Tossal de Pollerini site (Erillcastell).</p

    A large, multiple-tooth-rowed captorhinid reptile (Amniota: Eureptilia) from the Upper Permian of Mallorca (Balearic Islands, western Mediterranean)

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    <p>SUPPLEMENTAL DATA—Supplemental materials are available for this article for free at <a href="http://www.tandfonline.com/UJVP" target="_blank">www.tandfonline.com/UJVP</a></p> <p>Citation for this article: Liebrecht, T., J. Fortuny, À. Galobart, J. Müller, and P. Martin Sander. 2016. A large, multiple-tooth-rowed captorhinid reptile (Amniota: Eureptilia) from the Upper Permian of Mallorca (Balearic Islands, western Mediterranean). Journal of Vertebrate Paleontology. DOI: 10.1080/02724634.2017.1251936.</p

    An archosauromorph dominated ichnoassemblage in fluvial settings from the late Early Triassic of the Catalan Pyrenees (NE Iberian Peninsula)

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    <div><p>The vertebrate recovery after the end-Permian mass extinction can be approached through the ichnological record, which is much more abundant than body fossils. The late Olenekian (Early Triassic) tetrapod ichnoassemblage of the Catalan Pyrenean Basin is the most complete and diverse of this age from Western Tethys. This extensional basin, composed of several depocenters, was formed in the latest phases of the Variscan orogeny (Pangea breakup) and was infilled by braided and meandering fluvial systems of the red-beds Buntsandstein facies. Abundant and diverse tetrapod ichnites are recorded in these facies, including <i>Prorotodactylus mesaxonichnus</i> isp. nov. (tracks possibly produced by euparkeriids), cf. <i>Rotodactylus</i>, at least two large chirotheriid morphotypes (archosauriform trackmakers), <i>Rhynchosauroides</i> cf. <i>schochardti</i>, two other undetermined <i>Rhynchosauroides</i> forms, an undetermined Morphotype A (archosauromorph trackmakers) and two types of <i>Characichnos</i> isp. (swimming traces, here associated to archosauromorph trackmakers). The Pyrenean ichnoassemblage suggests a relatively homogeneous ichnofaunal composition through the late Early Triassic of Central Pangea, characterized by the presence of <i>Prorotodactylus</i> and <i>Rotodactylus</i>. Small archosauromorph tracks dominate and present a wide distribution through the different fluviatile facies of the Triassic Pyrenean Basin, with large archosaurian footprints being present in a lesser degree. Archosauromorphs radiated and diversified through the Triassic vertebrate recovery, which ultimately lead to the archosaur and dinosaur dominance of the Mesozoic.</p></div

    facebook_bandeira_carla_7_setembro_2015

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    <p>(A) Trackway of the paratype IPS-93867 and outline of the ichnites. (B, C) Detail of a manus-pes set (B) and a pes track (C) of the trackway with the 3D models and correlated with the limbs of <i>Euparkeria capensis</i> (modified from Nesbitt, 2011 and Bernardi et al., 2015); note that bones and ichnites are at the same scale. (D) Paratype of a well-preserved pes completely overstepping the manus (IPS-93867). (E) Paratype of the manus-pes set of IPS-93871. (F, G) Right pes tracks with prevalence impression of digits II, III and IV (tridactyl function); M and P in (E) refer to manus and pes tracks, respectively.</p

    Measurements (in mm) of skeletal elements in MFSN 1891 and in <i>Langobardisaurus</i> specimens.

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    <p>Measurements based on Renesto [<a href="http://www.plosone.org/article/info:doi/10.1371/journal.pone.0141275#pone.0141275.ref047" target="_blank">47</a>] and Saller et al. [<a href="http://www.plosone.org/article/info:doi/10.1371/journal.pone.0141275#pone.0141275.ref074" target="_blank">74</a>] and direct observation of the specimens. The vertebral lengths based on centrum length only (according to S. Renesto pers. comm. in <i>Langobardisaurus</i>) are reported in bold type. Abbreviations: M, mean.</p><p>Measurements (in mm) of skeletal elements in MFSN 1891 and in <i>Langobardisaurus</i> specimens.</p

    cf. <i>Rotodactylus</i> (Port del Cantó, section VI).

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    <p>Isolated manus track with the 3D model and ichnite outline. Note the longest digit III and the backwards rotated digit V.</p
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