Didn't realize ^bugg.er was cause for an Edit. Sorry folks.
Anyways, this is what I have found so far�
I have an old book, published in the 1970-1980s, stating that members of the Hyaenodontidae family ranged anywhere between the size of weasels and wolves - but this is a very broad description, as a creature�s individual mass cannot be clumped into a basic �Family� genus. (For example - both Panthera leo and Pardofelis marmorata are members of the Felidae Family, but it is quite apparent that the African Lion is far larger than the Marbled Cat.) A participant at InfoHub posted that it was comparable to a Wolf - but the individual does not state where this information was ascertained. For all I know, he/she may have used the same book - but did not read between the lines.
http://www.infohub.com/forums/showthread.php?t =8476
The Following Link declares that early species of Tritemnodon would have been more scansorial than those of the Sinopa variety (another archaic predator) which insinuates a relatively light frame - but to what degree remains unclear. Was it extremely scansorial, moderately, or barely at all? Was it a nimble, raccoon-sized carnivore that skittered from branch to branch daily, or a larger, fox-like critter, that merely climbed on occasion?
http://www.svpca.org/years/2000_portsmouth/abs tracts/abstractsae.html
T.Agilis is often cataloged as a proviverrine - the term viverrine meaning �..of or pertaining to the Viverridae, a family of small carnivorous mammals including the civets, genets, palm cats, etc�� and the word Pro ��prior to, beforehand, earlier than�� or possibly denoting details �...in favor of�� of extant members of the viverrine family. Does this also give an indicator