Rongeurs et lagomorphes du Miocène inférieur de Béon 2 (MN4, Montréal-du-Gers,SW France) |
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Authors: | Christian Bulot Pierre-Olivier Antoine Francis Duranthon |
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Affiliation: | 1. 8, chemin du Bois-des-Rogers, 17810 Nieul-les-Saintes, France;2. UPS (SVT-OMP), LMTG, université de Toulouse, 14, avenue Édouard-Belin, 31400 Toulouse, France;3. CNRS, LMTG, université de Toulouse, 14, avenue Édouard-Belin, 31400 Toulouse, France;4. IRD, LMTG, université de Toulouse, 14, avenue Édouard-Belin, 31400 Toulouse, France;5. Laboratoire d’étude et de conservation du patrimoine, université de Toulouse, Muséum d’histoire naturelle de Toulouse, 39, allées Jules-Guesde, 31000 Toulouse, France;6. Muséum d’histoire naturelle de Toulouse, 35, allées Jules-Guesde, 31400 Toulouse, France |
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Abstract: | About 200 micromammal isolated teeth (rodents, lagomorphs) originating from the middle Orleanian locality of Béon 2 (Montréal-du-Gers, SW France) are described. The rodent fauna is dominated by myomorphs (7 species), including the cricetid Democricetodon aff. hispanicus Fahlbusch, the melissiodontid Melissiodon sp., the glirids Peridyromys murinus (Pomel), Pseudodryomys aff. ibericus, Pseudodryomys aff. simplicidens, and Glirudinus modestus (Dehm), and the eomyid Ligerimys aff. florancei. Sciuromorphs are represented only by Heteroxerus rubricati Crusafont, Villalta and Truyols. Within lagomorphs, 2 dental morphs referred to the ochotonid Prolagus Pomel are identified in Béon 2. They correspond to Prolagus oeningensis (König) and P. aff. vasconiensis. On a biostratigraphical point of view, this study confirms the location of Béon 2 at the early part of the MN4; this locality is older than other regional sites such as Pellecahus, Béon 1, La Romieu, and Bézian (MN4b), and it is coeval to Artenay, in the Loire basin. In particular, glirids and lagomorphs from Béon 2 testify to close relationships with micromammal localities referred to the MN3 biozone. |
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Keywords: | Orlé anien Bassin d&rsquo Aquitaine Biostratigraphie Myomorpha Sciuromorpha Ochotonidae |
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