Thing << I would like to see all the transitionals including the animal, (not a horse, or even horse-like), which it came from. >>
Well, first we start off with a single cell like this:
http://www.bringyou.to/SingleCell.jpg
Then after a few billion years we get…
The line that eventually produced Equus developed as follows: ( Ma = million years ago )
http://www.bringyou.to/DawnHorse.jpg
–
Hyracotherium (early Eocene, about 55 Ma, previously “Eohippus”) – The famous “dawn horse,” a small, doggish perissodactyl, with an arched back, short neck, omnivore teeth, and short snout, 4 toes in front and 3 behind
… skipping a few million years of macroevolution
–
Merychippus gunteri (mid-Miocene, 18 Ma) – Three-toed grazer, fully spring-footed with high-crowned teeth
–
Merychippus primus (mid-Miocene, 17 Ma) – Slightly more advanced
–
Merychippus spp (mid-late Miocene, 16-15 Ma) – 3-toed grazers, spring-footed, size of small pony
and then… some more extinct ones…
–
M. primus
–
M. sejunctus
–
M. isonesus
–
M. intermontanus
–
M. stylodontus
–
M. carrizoensis
… finally we get…
Equus (Equus) (Pleistocene, about 1 Ma) – Subgenus of modern 1-toed spring-footed grazing horses and donkeys
http://www.bringyou.to/MrEdHorse.jpg
Order
Perissodactyla, Family
Equidae, Genus
Equus
–
Equus burchelli: the Plains zebra of Africa, including “Grant’s zebra”, “Burchell’s zebra”, “Chapman’s zebra”, the half-striped Quagga, and other subspecies. The Plains zebra is what people usually think of as the “typical zebra”, with rather wide vertical stripes, and thick horizontal stripes on the rump.
–
Equus zebra: the Mountain zebra of South Africa. This is the little zebra with the dewlap and the gridiron pattern on its rump.
–
Equus grevyi: Grevy’s zebra, the most horse-like zebra. This is the big zebra with the very narrow vertical stripes and huge ears.
–
Equus caballus, the true horse, which once had several subspecies.
–
Equus hemionus: the desert-adapted onagers of Asia & the Mideast, including the kiang (formerly E. kiang).
–
Equus asinus: the true asses & donkeys of northern Africa. (The African wild asses are sometimes called E. africanus.)
HORSES SOURCES:
Introduction to the Perissodactyla by Univ CA Berkeley
The Evolution of Perissodactyls by Donald R. Prothero and Robert M. Schoch, ed. (Oxford Univ Press, 1989)
Fossil Horses: Systematics, Paleobiology, and Evolution of the Family Equidae by Bruce J. MacFadden (Cambridge Univ Press, 1994)
Horse Evolution FAQ by Kathleen Hunt
Fossil Horses In Cyberspace by Florida Museum of Natural History!
Phil P