Thanks for taking the time to answer Gradyll.
More or less accurate to my limited knowledge,
here's a better description of the beasts, it seems that the particular critter depicted is a member of the extinct Hyracotherium genus.
You don't think the modern horse is a distinct type (kind

) of animal to the Hyracotherium?
They are classed are members of the the same
order Perissodactyla (including rhinos, tapirs etc) but are different
genus, family, genus & species.
I'm not sure what you talking about here, or how it's relevant to the question. No animal can mate with "two genera" can it?
I'm not trying to prove that the Hyracotherium
is the ancestor of the modern horse, I'm trying to figure out what creationists mean when they talk about the difference between micro and macro-evolution and how the latter is impossible.
Human are apes.
Nah, it's been settled for a century, but that is not the point of the question.