Abstract
The phylogenetic relationship of the order Tubulidentata to other Mammalia has been studied on the basis of the osseous, vascular and nervous systems of the head. A number of features seem to indicate that the Tubulidentata did not originate from Condylarthra or other Ungulata contrary to the opinion commonly held. The alleged pholidote Leptomanis is probably the oldest known tubulidentate (Eo-Oligocene of France).