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New fossils of Amphicyonidae (Carnivora) from the middle Miocene (MN6) site of Carpetana (Madrid, Spain)

Authors: Siliceo, Gema; Morales, Jorge; Antón, Mauricio; Salesa, Manuel J.;

New fossils of Amphicyonidae (Carnivora) from the middle Miocene (MN6) site of Carpetana (Madrid, Spain)

Abstract

[FR] Nouveaux fossiles d’Amphicyonidae (Carnivora) du Miocène moyen (MN6) de Carpetana (Madrid, Espagne).Nous présentons ici l’étude d’un échantillon intéressant de fossiles de l’amphicyonidé géant Megam-phicyon giganteus (Schinz, 1825) du gisement espagnol du Miocène moyen (MN6) de Carpetana (Madrid), obtenus lors de travaux publics dans le métro de la ville en 2008. Bien que la dentition de cette espèce soit connue sur d’autres sites, les os postcrâniens sont très mal connus, et le nouveau matériel fournit de nouvelles données sur les adaptations locomotrices de ce spectaculaire prédateur, et permet une estimation de sa masse corporelle, qui avoisinerait 600 kg. Étonnamment, malgré cette taille gigantesque, la morphologie du fémur et du tibia montre que cet animal présentait des capacités de coureur plus élevées que les grands carnivores existants, tels que les ours, ce qui, outre un degré élevé de mouvements de pronation/supination sur l’avant-bras, révèle les adaptations de M. giganteus à occuper le créneau des principaux prédateurs actifs des écosystèmes du Miocène moyen.

[EN] Herein, we present a study of an interesting sample of fossils of the giant amphicyonid Megamphi-cyon giganteus (Schinz, 1825) from the Spanish middle Miocene (MN6) site of Carpetana (Madrid city), obtained during public works for the Madrid underground in 2008. Although the dentition of this species is known from other sites, the postcranial bones are very poorly known, and the new material provides new data on the locomotor adaptations of this spectacular predator, and allows an estimation of its body mass, which would be around 600 kg. Surprisingly, despite this giant size, the morphology of both femur and tibia shows that this animal exhibited higher cursorial capacity than large extant carnivorans, such as bears, which together with a high degree of pronation/supina-tion movement of the forearm, reveals adaptations of M. giganteus to occupy the niche of active top predator in middle Miocene ecosystems.

This study is part of the research project CGL2015-68333-P (MINECO/FEDER, UE). GS is member of the research group “Bioacústica Evolutiva y Paleoantropología”. JM is member of the research groups UCM-BSCH-910607, and CSIC-641538. MJS is member of the research groups CSIC-641538, and FOCONTUR (Fundación Conjunto Paleontológico de Teruel-Dinópolis).

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Spain
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Keywords

Carnivora, Biodiversity, Megamphicyon, Locomotor adaptations, Middle Miocene, Spain, Mammalia, Animalia, Amphicyonidae, Chordata, Taxonomy

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citations
This is an alternative to the "Influence" indicator, which also reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Citations provided by BIP!
popularity
This indicator reflects the "current" impact/attention (the "hype") of an article in the research community at large, based on the underlying citation network.
BIP!Popularity provided by BIP!
influence
This indicator reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Influence provided by BIP!
impulse
This indicator reflects the initial momentum of an article directly after its publication, based on the underlying citation network.
BIP!Impulse provided by BIP!
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Italian National Biodiversity Future Center