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Equid feet



>On Wed, 7 Feb 1996, th81 wrote:
>
>> Such as Hyracotherium and Equus?
>
>*Are* _Hyracotherium_ and _Equus_ confamilial?  Should they be?
>
Basal four toed equids, which used to be included under the name
'Hyracotherium' (which properly belongs to the paleothere lineage) ARE
included in Equidae in most classifications.  Furthermore, three-toed equids
are, to my knowledge, *universally* included in Equidae (the one-toed
condition being evolved more than once).

So, differences in the feet as great as the number of toes are not regarded
as sufficient to separate genera out of a single family in well-studied
clades.

Thomas R. Holtz, Jr.
Vertebrate Paleontologist
Dept. of Geology
University of Maryland
College Park, MD  20742
Email:Thomas_R_HOLTZ@umail.umd.edu (th81)
Fax: 301-314-9661
Phone:301-405-4084