Les traces de pas de Dinosaures et autres Archosaures du Lias inférieur des grands Causses, Sud de la France

Demathieu, Georges; Gand, Georges; Sciau, Jacques; Freytet, Pierre; Garric, Jacques

doi:10.18563/pv.31.1-4.1-143

Cited by 20 publications

(51 citation statements)

References 18 publications

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“…G. variabilis was described based on material from the tidal flat area of Le Veillon (Vendée, western France; de Lapparent & Montenat, 1967) and G. sauclierensis was described based on material from the Sauclières quarry (Aveyron, southern France; Demathieu & Sciau, 1992): small track (i.e., 14 cm long) longer than wide, well distinguished and thin traces of digits, digito-metatarsal pad of digit IV more proximal than of digit II. Although they are abundant in the middle and southern part of the Causses Basin (Demathieu et al, 2002), small Grallator traces seem less common in northern part of the basin (Moreau et al, 2014). Two footprints from the Malaval Cave (A4 and A13; Fig.…”

Section: Comparison With Other Early Jurassic Tracks and Probable Tramentioning

confidence: 99%

“…4). We also used "D" which corresponds to the length of the free part of digit III sensu Demathieu et al (2002). This is not to be confused with D for Depth.…”

Section: Trace Fossil Analysismentioning

confidence: 99%

“…(e.g., Demathieu et al, 2002;Gand et al, 2007;Moreau et al, 2012aMoreau et al, , 2014, Poland (e.g., Gierliński et al, 2004;Niedźwiedzki & Pieńkowski, 2016) and Sweden (e.g., Ahlberg & Siverson, 1991;Lockley & Meyer, 2000). In the Causses Basin, four ichnospecies of Grallator were previously reported Grallator lescurei (Demathieu, 1990), G. minusculus (Hitchcock, 1858), G. sauclierensis (Demathieu & Sciau, 1992), and G. variabilis (de Lapparent & Montenat, 1967).…”

Section: Comparison With Other Early Jurassic Tracks and Probable Tramentioning

confidence: 99%

“…Except the Causses Basin and the Vendée, Grallator was also reported from other French tracksites dispersed in Dordogne (Gand et al, 2007), Hérault (Bogdanoff et al, 1984;Gand et al, 2007) and Var (Ellenberger, 1965). Although the validity of the ichnotaxon Dilophosauripus (Welles, 1971) is debatable according to some authors (see Lucas et al, 2006), this ichnogenus was reported from Hettangian-Sinemurian deposits of numerous localities in France (e.g., Demathieu & Sciau, 1992;Demathieu, 1993;Demathieu et al, 2002;Sciau, 2003;Demathieu & Gand , 2003;Gand et al, 2007). "Dilophosauripus-Kayentapus" morphotype from Malaval shares many similarities with Dilophosauripus williamsi described by Demathieu et al (2002) from the Hettangian-Sinemurian deposits of the Causses Basin: medium-size footprint (i.e., 22 cm in average), values of the ratio L/W close to 1, large divarication angle between II and IV, and impressions of II and IV quite similar in length.…”

Section: Comparison With Other Early Jurassic Tracks and Probable Tramentioning

confidence: 99%

“…Because of the abundance and the diversity of footprints, in France, the most important Early Jurassic megatracksite is the Causses Basin (southern France; e.g., Monod, 1935;Thaler, 1962;Ellenberger, 1988;Demathieu, 1990Demathieu, , 1993Demathieu & Sciau, 1999;Demathieu et al, 2002;Moreau et al, 2012aMoreau et al, , 2012bMoreau et al, , 2014. In this basin, dozens of outdoor tracksites were discovered during the last decades.…”

Section: Introductionmentioning

confidence: 99%

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Underground dinosaur tracksite inside a karst of southern France: Early Jurassic tridactyl traces from the Dolomitic Formation of the Malaval Cave (Lozère)

Moreau

Trincal

André³

et al. 2018

IJS

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Abstract:Although underground dinosaur tracksites inside anthropic cavities such as mines or tunnels are well-known throughout the world, footprints inside natural karstic caves remain extremely rare. The Malaval Cave (Lozère, southern France) is well-known by speleologists for the abundance and the exceptional quality of acicular and helictite aragonite speleothems. Recent palaeontological prospecting inside this cave allowed the discovery of tridactyl dinosaur tracks.Here, a detailed study of theropod footprints was for the first time conducted inside a natural karstic cave, using photogrammetric imaging technique. Tracks from the Malaval Cave are located inside the "Super-Blanches" galleries. More than 26 footprints were identified. They are Hettangian in age (Lower Jurassic) and preserved as both in situ convex hyporeliefs and ex situ concave epireliefs. Tree morphotypes are distinguished, (i) "DilophosauripusKayentapus" morphotype, (ii) "Eubrontes" morphotype, and (iii) "Grallatorid" morphotype. Sedimentological and mineralogical analyses of the tracksite indicate that the depositional environment varied from periodically emergent subtidal to intertidal/supratidal flat marsh. This work highlights the great interest and importance of palaeoichnological prospecting in karst caves. This is particularly true for the Causses Basin where hundreds of natural cavities were reported by speleologists in the formations yielding dinosaur traces.

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Section: Comparison With Other Early Jurassic Tracks and Probable Tramentioning

confidence: 99%

“…4). We also used "D" which corresponds to the length of the free part of digit III sensu Demathieu et al (2002). This is not to be confused with D for Depth.…”

Section: Trace Fossil Analysismentioning

confidence: 99%

Section: Comparison With Other Early Jurassic Tracks and Probable Tramentioning

confidence: 99%

Section: Comparison With Other Early Jurassic Tracks and Probable Tramentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Underground dinosaur tracksite inside a karst of southern France: Early Jurassic tridactyl traces from the Dolomitic Formation of the Malaval Cave (Lozère)

Moreau

Trincal

André³

et al. 2018

IJS

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Late Jurassic dinosaur footprints from Chassiron–La Morelière (Oléron Island, western France)

Moreau

Néraudeau

Vullo

et al. 2017

Palaeobio Palaeoenv

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International audienceA new dinosaur tracksite was recently discovered in the Upper Jurassic deposits from the Oléron Island (Atlantic Ocean, western France). Tracks are located along the coastline in the tidal area of La Morelière near “Pointe de Chassiron”. They were observed in situ in an evaporitic interval from the “Purbeck beds” Unit. Sediments consist of calcite recrystallised after gypsum dissolution within limestone layers which are composed of thin laminites. The track-bearing surface shows abundant mud cracks and some ripple marks. Ichnofossils consist of medium-sized tridactyl footprints of theropods forming a narrow trackway. In order to obtain 3D reconstructions of the track-bearing surface, the trackway was scanned with a resolution of 0.5 mm using an Artec Eva 3D white-light scanner. As indicated by the track dimensions, the probable trackmaker is assigned to a medium-sized non-coelurosaur tetanuran, such as a megalosauroid or an allosauroid theropod. The palaeoenvironmental context is interpreted as a tidal flat in an evaporitic basin. In addition to the tridactyl tracks, we report sauropod- and thyreophoran-like tracks on two other surfaces from Chassiron–La Morelière

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Deux nouveaux sites à traces de pas dinosauroïdes dans la Formation Dolomitique de l’Hettangien de Lozère, Languedoc-Roussillon, France

Moreau

Trincal

Gand

et al. 2014

Annales de Paléontologie

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Les traces de pas de Dinosaures et autres Archosaures du Lias inférieur des grands Causses, Sud de la France

Cited by 20 publications

References 18 publications

Underground dinosaur tracksite inside a karst of southern France: Early Jurassic tridactyl traces from the Dolomitic Formation of the Malaval Cave (Lozère)

Underground dinosaur tracksite inside a karst of southern France: Early Jurassic tridactyl traces from the Dolomitic Formation of the Malaval Cave (Lozère)

Late Jurassic dinosaur footprints from Chassiron–La Morelière (Oléron Island, western France)

Deux nouveaux sites à traces de pas dinosauroïdes dans la Formation Dolomitique de l’Hettangien de Lozère, Languedoc-Roussillon, France

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