First palaeanodont (?pholidotan) mammal from the Eocene of Europe - MNHN - Muséum national d'Histoire naturelle Accéder directement au contenu
Article Dans Une Revue Acta Palaeontologica Polonica Année : 2005

First palaeanodont (?pholidotan) mammal from the Eocene of Europe

Résumé

We report the discovery in the early Eocene French locality of Le Quesnoy (MP7, Neustrian) of the first palaeanodont from the Eocene of Europe, and the first metacheiromyid from outside of western North America. The species, known from a dentary and a few postcranial bones, belongs to the genus Palaeanodon, and it is one of several North American immigrant taxa that characterize the Paleocene-Eocene faunal turnover in Europe. Palaeanodon sp. from Le Quesnoy is close in size to P. nievelti from the early Wasatchian of North America. However, it shows noticeable primitive features such as a more prominent ventral keel on the metacarpal III and a probably elongated and bilobed pc4 (= p4), although this is inferred from the infilled alveolus. Additional original features are also noticed on the tentatively referred astragalus. These minor differences suggest that the Le Quesnoy form represents a new species, but the available material remains in− adequate to name it. The morphology and the size of the metacarpal are actually closer to P. parvulus (Clarkforkian)-P. nievelti (Wasatchian) intermediates, suggesting a sister−group relationship with the latter (if Palaeanodon sp. from Le Quesnoy is not shown to belong to a distinct European lineage). This would indicate a dispersal at least as old as P. nievielti and a correlation of Le Quesnoy not later than early Wasatchian. The discovery of Palaeanodon in Le Quesnoy fits paleobiogeographically well with the hypothesis of a relationship of palaeanodonts to pholidotans, which have their earliest record in the middle Eocene of Europe (Messel).
Fichier principal
Vignette du fichier
Gheerbrant et al. 2005 Palaeanodont.pdf (410.74 Ko) Télécharger le fichier
Origine : Fichiers éditeurs autorisés sur une archive ouverte
Loading...

Dates et versions

mnhn-02264872 , version 1 (07-08-2019)

Identifiants

  • HAL Id : mnhn-02264872 , version 1

Citer

Emmanuel Gheerbrant, Kenneth D Rose, Marc Godinot. First palaeanodont (?pholidotan) mammal from the Eocene of Europe. Acta Palaeontologica Polonica, 2005, 50 (2), pp.209-218. ⟨mnhn-02264872⟩
115 Consultations
50 Téléchargements

Partager

Gmail Facebook X LinkedIn More