Vertebrate footprints from the Kem Kem beds (Morocco): A novel ichnological approach to faunal reconstruction

Belvedere, Matteo; Jalil, Nour‐Eddine; Breda, Anna; Gattolin, Giovanni; Bourget, Hélène; Khaldoune, Fatima; Dyke, Gareth J.

doi:10.1016/j.palaeo.2013.04.026

Cited by 53 publications

(36 citation statements)

References 15 publications

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“…Moreover, this software is used by paleontologists (e.g., Brassey et al, 2015;Castanera et al, 2013). Agisoft PhotoScan, also recently used in paleontology (e.g., Belvedere et al, 2013), is considered the most efficient (L. Cazes, pers. comm.)…”

Section: Devices For Acquisition and Analysismentioning

confidence: 99%

“…For example, synchrotron X-ray micro-tomography (Laloy et al, 2013;Pradel et al, 2009;Rücklin et al, 2014) enables us to see through rock and to have access to internal structures. Conversely, three dimension (3D) surface analyses are generally acquired with surface scanners (e.g., Clarac et al, 2015;Falkingham, 2012) or photogrammetry (e.g., Belvedere et al, 2013;Brassey et al, 2015;Castanera et al, 2013;Falkingham, 2012;Petti et al, 2008). Photogrammetry is a method for reconstructing an object in 3D from photographs.…”

Section: Introductionmentioning

confidence: 99%

“…Photogrammetry is already commonly used in some research fields like geology, for monitoring earth deformation from aerial or satellite photographs (e.g., Lane et al, 2000;Mora et al, 2003;Wolf and Dewin, 2000), in archeology to improve in situ topological or taphonomic data acquisition (De Reu et al, 2013, or for surveys of the cultural heritage (e.g., Guarnieri et al, 2004;Salonia et al, 2007Salonia et al, , 2009. In paleontology, photogrammetry has only been used for a few years Breithaupt et al, , 2004Matthews and Breithaupt, 2001), but 3D digitizing of both specimens and surfaces of excavation, in particular for ichnofossils, is increasingly used (e.g., Belvedere et al, 2013;Brassey et al, 2015;Castanera et al, 2013;Falkingham, 2012;Petti et al, 2008). There is no theoretical limitation of specimen size for using photogrammetry.…”

Section: Introductionmentioning

confidence: 99%

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Photogrammetry for 3D digitizing bones of mounted skeletons: Potential and limits

Fau

Cornette

Houssaye

2016

Comptes Rendus Palevol

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Please cite this article in press as:Fau, M., et al., Photogrammetry for 3D digitizing bones of mounted skeletons: Potential and limits. C. R. Palevol (2016), http://dx. a b s t r a c tSince the late 20th century, new technologies have provided powerful ways to digitize biological structures in three dimensions (3D). Among those, photogrammetry is a low cost and non-destructive method, which has become increasingly used since the development of the digital camera. Recent studies have demonstrated that reconstructions of isolated elements can be of as high quality as those obtained with laser scanners. Here, we wanted to test the performance of photogrammetry for the quantitative analysis of mounted specimens in museum exhibitions. Indeed, access to material can be an issue in comparative anatomy and, especially, in paleontology. This is notably the case for large, impressive specimens. We performed reconstructions based on acquisitions done under various conditions and also tested the reconstruction performance of two software programs. The resulting 3D models were then compared to a reference object corresponding to the bone of interest digitized with a cutting-edge surface scanner. Our results show that photogrammetry enables quality reconstruction of the almost entire surface of the mounted bone of interest. Photogrammetry thus appears a reliable method perfectly suited to study large specimens exposed in museum gallery.Mots clés : Photogrammétrie Squelettes montés Paléontologie 3D Digitalisation Agisoft photoscan VisualSFM r é s u m é Depuis la fin du XX e siècle, de nouvelles technologies ont fourni des outils puissants permettant de numériser des structures biologiques en trois dimensions (3D). Parmi ceux-ci, la photogrammétrie est une méthode bon marché et non destructive, qui a connu un essor avec le développement des appareils photonumériques. Des études récentes ont montré que les reconstructions par photogrammétrie d'éléments isolés peuvent être d'aussi bonne qualité que celles obtenues avec des scanners surfaciques. Ici, nous avons testé les performances de la photogrammétrie pour l'analyse quantitative de spécimens exposés dans des musées. En effet, l'accès au matériel peut être problématique en anatomie comparée ou en paléontolo-gie ; c'est notamment le cas pour les spécimens de grande taille. Plusieurs reconstructions ont été faites avec des photographies prises dans des conditions différentes, et en utilisant Please cite this article in press as:Fau, M., et al., Photogrammetry for 3D digitizing bones of mounted skeletons: Potential and limits. C. R. Palevol (2016), http://dx.G Model PALEVO-962; No. of Pages 10 2 M. Fau et al. / C. R. Palevol xxx (2016) xxx-xxxdeux logiciels différents, afin de tester leurs prestations. Les modèles 3D obtenus ont été alors comparés à un objet de référence : l'os étudié, numérisé avec un scanner surfacique de pointe. Les résultats montrent que la photogrammétrie permet une reconstruction de bonne qualité de pratiquement toute la surface de l'os étudié. La photogramm...

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Section: Devices For Acquisition and Analysismentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Photogrammetry for 3D digitizing bones of mounted skeletons: Potential and limits

Fau

Cornette

Houssaye

2016

Comptes Rendus Palevol

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“…Belvedere et al . ). In other cases, the track record is the only fossilized evidence available for reconstructing the tetrapod diversity (ichnodiversity) of these ancient environments (Lockley ).…”

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confidence: 97%

Geometric morphometric analysis applied to theropod tracks from the Lower Cretaceous (Berriasian) of Spain

et al. 2014

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Geometric morphometric methods applied to theropod tracks from the Huérteles Formation (Berriasian, Spain) are here shown to be invaluable for drawing comparisons between theropod tracks with different preservation modes (true tracks, shallow undertracks and natural casts) or differing in the preservation of anatomical features (e.g. digital pads). Principal components analysis and thin‐plate spline methods can quantitatively distinguish between the broad groups of tracks in a sample and establish the main differences between them. These methods offer a promising approach for estimating ichnodiversity, achieved by evaluating just the morphology of the tracks independent of other factors such as size. The theropod tracks of the Huérteles Formation can be classified into two broad groups: minute‐to‐medium‐sized gracile theropod tracks (Kalohipus bretunensis) and medium‐to‐large‐sized robust theropod tracks (Iberosauripus). The presence of a third group of more gracile medium‐to‐large‐sized theropod tracks (Megalosauripus) cannot be proven with certainty on the basis of the current data. These results indicate that the theropod ichnodiversity of the Huérteles Formation is probably lower than that estimated by means of conventional methods alone (e.g. qualitative description of the tracks) and that many of the described theropod morphotypes may represent extramorphological or ontogenetic variations of other morphotypes.

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“…Las icnitas de tortugas se encuentran en pocos yacimientos en todo el mundo, habiéndose citado en: Alemania (Triásico; Haubold, 1971;Berriasiense;Karl et al, 2012;Hornung & Reich, 2013); Francia (Jurásico Superior de Cerín; Bernier et al, 1982Bernier et al, , 1984Gaillard et al, 2003;Jurásico Superior de Crayssac;Mazín et al, 2001); Inglaterra (Jurásico Medio de Cleveland Basin; Romano & Whyte, 2003); Croacia (Albiense superior de la isla de Veli Brijun; Mezga & Bajraktarevic, 2004); Marruecos (Cenomaniense de Kem Kem; Belvedere et al, 2013); EEUU (Formación Morrison en el Jurásico Superior de Utah, Foster et al, 1999, Lockley & Foster, 2006 Cretácico Superior de Colorado, Wright & Lockley, 2001) y China (Lockley et al, 2012;Xing et al, 2014). Lo mismo sucede en la Península Ibérica, aquí se han encontrado: en Asturias (Fm.…”

Section: Introductionunclassified

Las huellas de tortuga del Grupo Oncala (Berriasiense, Cuenca de Cameros, España)

Pascual-Arribas¹,

Hernández-Medrano²

2015

Estud. geol.

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Vertebrate footprints from the Kem Kem beds (Morocco): A novel ichnological approach to faunal reconstruction

Cited by 53 publications

References 15 publications

Photogrammetry for 3D digitizing bones of mounted skeletons: Potential and limits

Photogrammetry for 3D digitizing bones of mounted skeletons: Potential and limits

Geometric morphometric analysis applied to theropod tracks from the Lower Cretaceous (Berriasian) of Spain

Las huellas de tortuga del Grupo Oncala (Berriasiense, Cuenca de Cameros, España)

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