MurphOnMillerAve wrote:What your chart about the horses indicates to me is that the fossil record is missing specimens…
No doubt. I have ridden my bicycle past dead animals ranging in size from a mouse to a steer and noted the carcasses disappear without ever fossilizing. The mouse was gone the next day. The steer took two years. Once the fur and skin disappeared, the bones seemed to walk away… I found them farther and farther from the original site every day. I really expected the head to remain, but it too was gone one day. Singer,
Encyclopedia of Paleontology, 1999, states, "…It appears that 85 to 97 percent of all the species in the nine, well-skeletonized phyla that have ever lived have never been fossilized." It may be the missing horse fossil you* are looking for does not exist.
*Not you literally, the bone hunters we all cheer on, and share in their joy at finding new fossil species through reading about it in the media.
MurphOnMillerAve wrote:I'm just not sure the horse, in all its present forms, like Clydesdales (sp?) and Arabians, for example, just occurred one lovely weekday (of the Julian Calendar, no less) afternoon in a happy little garden, awaiting their new names.
Good to be skeptical on that idea Murph. Google, "where did the 'name of horse breed' originate" and you will find the Clydesdales and Arabians did not just occur one day, they were bred and cross bred from existing horse breeds who, in turn, were bread from existing horse breeds… all the way back to some proto horse (or horses.)
Here is a "Seen in Print" from 2500 B.C.E. You can detect different breeds of horse in the panel.

- Standard of Ur - War Panel
- Standard_of_Ur_-_War.jpg (122.95 KiB) Viewed 2844 times
Hmm, the war horses of Ur seem to have wind up keys on their backs. I wonder if they were mechanical? Did you notice the little dark horse on right side of display in front of an early horse fossil? It is an early mechanical horse.
The mechanical horse on the platform has already evolved into a larger horse like this one =>
https://youtu.be/1TXOHAVuS5QAnd for the military, an even larger draft horse version =>
https://youtu.be/cr-wBpYpSfE