Notices
Results 1 to 4 of 4

Thread: Tapir Evolution

  1. #1 Tapir Evolution 
    Forum Masters Degree Golkarian's Avatar
    Join Date
    Nov 2008
    Posts
    510
    Do paleontologists believe that tapirs lost two toes separately from horse evolution?


    Reply With Quote  
     

  2.  
     

  3. #2  
    Universal Mind John Galt's Avatar
    Join Date
    Jul 2005
    Posts
    14,168
    Not my area of expertise. How closely are tapirs and horses related? If their last common ancestor still had a full compliment of toes then clearly the loss of toes was a separate event. The more I think on it the less sense your quesiton makes. Perhaps in your response you can clarify things.


    Reply With Quote  
     

  4. #3  
    WYSIWYG Moderator marnixR's Avatar
    Join Date
    Apr 2007
    Location
    Cardiff, Wales
    Posts
    5,810
    i'm speaking from memory here, but i seem to remember that the common ancestor of the tapir-rhino lineage and the horse lineage lived some time in the Late Paleocene adn can be found amongst the Phenacodontidae who had 5 toes but with digits I and V already reduced - within the Phenacodontids Tetraclaenodon is thought to be closer to horse lineage, and Homogalax closer to the tapir lineage

    Hyracotherium (horse lineage) had 4 toes at the front foot and 3 at the hind foot, not sure about the earlies tapir ancestors
    "Reality is that which, when you stop believing in it, doesn't go away." (Philip K. Dick)
    Reply With Quote  
     

  5. #4  
    Time Lord Paleoichneum's Avatar
    Join Date
    Oct 2008
    Location
    Washington State, USA
    Posts
    5,181
    You've covered it pretty well marnixR. The split was prior to the reduction in digits 2 and 4 in equines but after 1 and 5 had started to become reduced.
    If more of us valued food and cheer and song above hoarded gold, it would be a merrier world. -Thorin Oakenshield

    The needs of the many outweigh the need of the few - Spock of Vulcan & Sentinel Prime of Cybertron ---proof that "the needs" are in the eye of the beholder.
    Reply With Quote  
     

Similar Threads

  1. The evolution of man...
    By Elando in forum History
    Replies: 22
    Last Post: March 12th, 2013, 05:39 AM
  2. Evolution
    By fatooma in forum Biology
    Replies: 16
    Last Post: May 25th, 2010, 08:22 PM
  3. Evolution
    By Iloveyou in forum Pseudoscience
    Replies: 2
    Last Post: March 14th, 2010, 10:03 AM
  4. Replies: 19
    Last Post: May 1st, 2009, 11:45 AM
  5. Evolution
    By Mike NS in forum Scientific Study of Religion
    Replies: 90
    Last Post: August 7th, 2007, 12:04 PM
Bookmarks
Bookmarks
Posting Permissions
  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •