Equus (genus) 54 million years ago (Mya). These animals had three toes on the hind feet and four on the front feet with small hooves in place of claws, but also had soft pads.<ref name="doi10.1126/science.1105458"></ref> Equids developed into larger, three-toed animals (e.g. "Mesohippus") during the Oligocene and Miocene. From there, the side toes became progressively smaller through the Pleistocene until the emergence of the single-toed "Equus". The genus "Equus", which includes all extant equines, is believed to have evolved from "Dinohippus", via the intermediate form "Plesippus". One of the oldest species is "Equus simplicidens", described as zebra-like with a donkey-like head shape.
Phrynobatrachus africanus Throat is dark grey in males but spotted with brown in females. "Phrynobatrachus africanus" occurs in lowland swampy forests. It can survive in somewhat degraded forests, but not in open habitats outside forest. Males call from cavities and holes near streams. Breeding takes place in pools with standing water along streams. It is a very common species. It can be negatively affected by loss of its forest habitat caused by logging, agricultural encroachment, and human settlements. It occurs in several protected areas. Phrynobatrachus africanus Phrynobatrachus africanus (common name: African swamp frog) is a species of frog in the family Phrynobatrachidae.