Horse outward similarity is an unreliable measure of relatedness. Besides the horse, there are six other species of genus "Equus" in the Equidae family. These are the ass or donkey, "Equus asinus"; the mountain zebra, "Equus zebra"; plains zebra, "Equus quagga"; Grévy's zebra, "Equus grevyi"; the kiang, "Equus kiang"; and the onager, "Equus hemionus". Horses can crossbreed with other members of their genus. The most common hybrid is the mule, a cross between a "jack" (male donkey) and a mare. A related hybrid, a hinny, is a cross between a stallion and a jenny (female donkey). Other hybrids include the zorse,
Africanus Fabius Maximus Africanus' earliest post was as a military tribune in Spain, though this is not certain. His only two certain civilian posts were as ordinary consul in 10 BCE (with Iullus Antonius), and as proconsul of Africa in 6/5 BCE. He was admitted to the priesthood of the "septemviri epulonum" at some point after 25 BCE. It was during his tenure as proconsul of Africa that Africanus struck some coins that bore his own image. Although no wife is attested for Africanus, it is possible that he had a daughter named Fabia Numantina. Alternatively, she may have been the daughter of