Hyloidichnus trackways with digit and tail drag traces from the Permian of Gonfaron (Var, France): New insights on the locomotion of captorhinomorph eureptiles - Archive ouverte HAL Accéder directement au contenu
Article Dans Une Revue Palaeogeography, Palaeoclimatology, Palaeoecology Année : 2021

Hyloidichnus trackways with digit and tail drag traces from the Permian of Gonfaron (Var, France): New insights on the locomotion of captorhinomorph eureptiles

Résumé

Newly discovered tetrapod footprints from the middle Permian Pelitic Forma tion of Gonfaron (Le Luc Basin, Var, France) are describe d in detail and assigned to the ichn ogenu s Hyloidichnus. These specime ns are very well-preserved, with detailed trackways showing anatomical features, digit drag traces and continuous tail impressions. Together with other Hyloidichnus specime ns from the same locality and from the University of Burgund y collections, they allow the identification of the possible trackma kers of Hyloidichnus: sm all Hyloidichnus footprints are correlated with captorhinomorphs with autopodia similar to Captorhinus wh ereas large Hyloidichnus footprints might be correlated with larger captorhinomorphs or other 'basal' (eventually stem-) moradisaurines. A detailed comparative analysis is proposed to be tter un derstand the locomotion style of the trackma kers. Starting from the reconstruction of the stance ph ase of Captorhinus, we docume nt the swing ph ase of the fore-and hind-limb s of captorhinomorphs thanks to the continuous digit drag traces associated with Hyloidichnus. A link be tween gait and track preservation have be en highlighted through the analysis of tail impressions and high-resolution 3D models. In all, this stud y increases our un derstanding of captorhinomorph locomotion and enhanc es the integration of both tracks and skeletal rema ins to highlight the biome ch anics of Permian tetrapods.

Domaines

Paléontologie
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Dates et versions

hal-03391428 , version 1 (21-10-2021)

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A Logghe, E Mujal, L Marchetti, A Nel, J-M Pouillon, et al.. Hyloidichnus trackways with digit and tail drag traces from the Permian of Gonfaron (Var, France): New insights on the locomotion of captorhinomorph eureptiles. Palaeogeography, Palaeoclimatology, Palaeoecology, 2021, 573, ⟨10.1016/j.palaeo.2021.110436⟩. ⟨hal-03391428⟩
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