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,
Hyundai Equus Hyundai Equus The Hyundai Equus () is a full-size luxury car produced by the South Korean manufacturer Hyundai since 1999. In 2009, Hyundai released the second generation utilizing a rear-wheel drive platform and competing with the BMW 7 Series, Mercedes S-Class, Audi A8 and Lexus LS. As of August 2014, the second generation is marketed in South Korea, Russia, China, United States, Canada, Central America, and South America — as well as in the Middle East under the Hyundai Centennial nameplate. The name ""equus"" is the Latin word for "horse". On November 4, 2015, Hyundai officially announced the Genesis brand