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,
Julius Africanus is a persistent belief in some quarters that Africanus was actually an African. However, being the son of a Gallic chief he was a member of a Celtic tribe. This confusion probably arises from an incorrect belief that the Roman cognomen Africanus means from Africa (i.e. born in Africa) rather than the correct meaning of famous relation to Africa. The name Africanus originated with Scipio Africanus, who defeated Carthage (in North Africa) during the Second Punic War. Julius Africanus Julius Africanus was a celebrated orator in the reign of Nero, and seems to have been the son of the Julius