Wild Horses: Evolution Timeline
[2023-09-26 10:43:39]
The first one is divided into Hyracotherium, a small forest animal in the early Eocene. It does not look like a horse (height 10 to 20 inches). It looks like a dog with an arched short neck, short nose, short leg, and long tail. It is seen on fruits and soft leaves and may more closely resemble the timidity of a deer (cowardice, elegance, etc). This famous pony was once called Eohippus or "Dawn Horse"
Mesohippus celer species appeared about 40 million years ago in the sudden late Eocene. This animal is slightly larger than Eohippus and has a 24-inch shoulder. I do not look like a dog anymore. The back is not so arched, the legs and neck are rather long, thick, the face is quite long. Mesohippus has three toes on his foot, and his foot is still a foot pedal. The fourth toe will be the rest stub
Just after the emergence of Mesohippus celer and its very closely related species, Mesohippus westoni, similar animals called Miohippus assiniboiensis appeared about 36 million years ago. A typical Miohippus is much larger than a typical Mesohippus and has a slightly larger skull. The facial fossa is deeper and more expanding. Also, the ankle joint has been slightly changed. Miohippus also began showing a variable peak on its upper cheek. In the latter horse species, this peak became a feature
17 million years ago, Merychippus joined the horse's line, roughly 10 hands or 40 feet high, the best muzzle. The muzzle extends, the lower jaw becomes deeper, the eyes move backwards according to the big root. A fairly large split new cortex and larger cerebellum of the brain make Merychippus wiser and more agile than previous horses. In general, this species can be clearly recognized as a horse with a very "horse" head.
About 15 million years ago, a three-finger horse Pilohippus appeared in the middle of Miocene. The outer toe is gradually lost in seeds through three consecutive layers. Pliohippus is very similar and, most recently, regarded as a direct ancestor of Equus, but there are two major differences. First, Pliohippus' skull has a deep facial fossa, but Equus has no facial fossa at all. Second, Pliohippus' teeth are strongly curved, but Equus's teeth are very straight. Pliohippus is clearly related to Equus, but the former may not have the latter
All modern horse genus, the first Equus is about 13.2 hands, pony size, classical "horse" body - rigid backbone, long neck, leg and nose, and unioned bones of healing legs - I'm waiting. The brain is a little bigger than the early Dinohippus. Like Dinohippus, Equus (and still) is a single toe with a transverse ligament that prevents the hoof from twisting. The seed has a strong crown with strong crown side by side with cement, straight, has teeth grazing
As time went on, the horse grew bigger. Unfortunately, the images of contemporary horses in the above picture are distorted because they are breeding horses. But even Mustang (1.60) is larger than Pliohippus (1.25). During evolution, horses grew longer and heads became longer. My head is long and slim. Initially the hind leg was longer than the front paws, then not long. The tail of the vertebra is replaced by the tail of the hair. The rear part of the horse became lighter and the front part became heavier. Mane strengthens the impression that the focus is on the former. The body gets stiff, and it becomes inflexible. The horse's toes are getting more and more straight. These external phenomena will cause internal changes such as an increase in the volume of the stomach, colon and cecum. Digestion moves behind
The horse of Przewalski (shuh-val-skee) native to Central Asian grassland is the only horse that has never been tame. ("Wild horses" are not really wild like American wild horses.The descendants of the domestic horse.) Przewalski's gazelle (commonly known as P horse) survives. Oops, on behalf of the occupation of the Nazis, they used them from the occupied countries (such as the Warsaw Zoo) to show off the German zoo. H