Access

You are not currently logged in.

Access your personal account or get JSTOR access through your library or other institution:

login

Log in to your personal account or through your institution.

If you need an accessible version of this item please contact JSTOR User Support

Megantereon hesperus from the Late Hemphillian of Florida with Remarks on the Phylogenetic Relationships of Machairodonts (Mammalia, Felidae, Machairodontinae)

Annalisa Berta and Henry Galiano
Journal of Paleontology
Vol. 57, No. 5 (Sep., 1983), pp. 892-899
Stable URL: http://www.jstor.org/stable/1304759
Page Count: 8
  • Read Online (Free)
  • Subscribe ($19.50)
  • Cite this Item
If you need an accessible version of this item please contact JSTOR User Support
Megantereon hesperus from the Late Hemphillian of Florida with Remarks on the Phylogenetic Relationships of Machairodonts (Mammalia, Felidae, Machairodontinae)
Preview not available

Abstract

The smilodontine felid Megantereon hesperus is described from the latest Hemphillian (early Pliocene) Upper Bone Valley Formation of central Florida. The Florida record marks the earliest known occurrence of Megantereon and adds to our poorly known record of this genus in North America. Old World records suggest immigration of Megantereon to Eurasia and Africa in the early Villafranchian (middle Pliocene). The genus is not known in North America after the middle Blancan (middle Pliocene). Within a cladistic framework, Megantereon hesperus is more primitive than the Old World species as judged by its larger lower canine and P3. Diagnostic characters of M. hesperus include: development of a prominent groove on the medial surface of the mandible and a stronger dorsoventral ridge marking the anterolateral rim of the mandibular flange. Megantereon and Smilodon are sister taxa and form the tribe Smilodontini Kurtén, 1963.

Page Thumbnails

  • Thumbnail: Page 
892
    892
  • Thumbnail: Page 
893
    893
  • Thumbnail: Page 
894
    894
  • Thumbnail: Page 
895
    895
  • Thumbnail: Page 
896
    896
  • Thumbnail: Page 
897
    897
  • Thumbnail: Page 
898
    898
  • Thumbnail: Page 
899
    899