Project 473: E. Cerdeño, B. Vera. 2010. Mendozahippus fierensis, gen. et sp. nov., New Notohippidae (Notoungulata) from the Late Oligocene of Mendoza (Argentina). Journal of Vertebrate Paleontology. 30 (6):1805-1817.
Specimen: † Mendozahippus fierensis (MCNAM-PV:4004)
View: ventral skull

Abstract

Since 2006, new field studies at the late Oligocene site of Quebrada Fiera (Mendoza, Argentina) have increased the previous faunal record from these levels that are presently considered as the base of the Agua de la Piedra Formation. Former faunal lists included Pyrotherium and Proborhyaena gigantea, representatives of the Deseadan Age. Among new materials, a complete skull and two associated metatarsals, two maxillary fragments with left I1-M2 and right I1-P3, and five isolated upper teeth represent the Family Notohippidae. Even though some characters are not comparable between the skull and maxillaries, shared features lead us to consider them as a unique and new taxon, Mendozahippus fierensis, gen. et sp. nov., and the isolated molars as cf. M. fierensis. As in previous phylogenies, our analysis indicates the Family Notohippidae is a paraphyletic group. The inclusion of Plexotemnus, Pampahippus, and Puelia within Notohippidae is not supported, but without them, the group is still paraphyletic. Leontiniids appear as basal taxa to the remaining notohippids and toxodontids. Mendozahippus presents one autapomorphy (lingually projected protocone of M3) and four homoplastic characters. It occupies a basal position with respect to other notohippids plus toxodontids. Mendozahippus increases the diversity and geographic distribution of Notohippidae during the late Oligocene. This and other taxa add some distinctiveness to this Deseadan fauna compared to other better-known assemblages from Patagonia or Salla (Bolivia), whereas other groups maintain clear affinities. The intermediate latitudinal position of Mendoza might explain these faunal characteristics.


Read the article »

Project DOI: 10.7934/P473, http://dx.doi.org/10.7934/P473
This project contains
  • 3 Media
  • 2 Documents
  • 1 Taxon
  • 1 Specimen
Total size of project's media files: 3 MB

Download Project SDD File
Currently Viewing:
MorphoBank Project 473
  • Creation Date:
    03 March 2011
  • Publication Date:
    16 April 2011
  • Project views: 13456


    Members

    member name taxa specimens media
    MorphoBank Curator
    Project Administrator
    Last logged in 05/13/12
    113
    Maureen Admin
    Full membership
    Last logged in 04/15/11
    000
    Esperanza Cerdeño
    Full membership
    Last logged in 03/09/11
    000


    Project has no matrices defined.



    Project views

    type number of views Individual items viewed (where applicable)
    Total project views13456
    Project overview2137
    Media views4270Media search (2766 views); M67505 (582 views); M67504 (465 views); M67506 (457 views);
    Documents list882
    Specimen list1938
    Views for media list1928
    Taxon list1643
    Bibliography658




    Project downloads

    type number of downloads Individual items downloaded (where applicable)
    Total downloads from project214
    Document downloads1Appendix 1 (1 download);
    Project downloads213