Equidae
Equidae (sometimes known as the horse family) is the taxonomic family of horses and related animals, including the extant horses, donkeys, and zebras, and many other species known only from fossils. All extant species are in the genus "Equus". Equidae belongs to the order Perissodactyla, which includes the extant tapirs and rhinoceros, and several extinct families.
Aquila (genus)
Members of "Aquila" (excluding those moved to "Clanga" and "Hieraaetus", but including "A. fasciata/spilogaster") share two deletions in the (nuclear) LDH gene, as well as similarities in mitochondrial cyt-B gene sequence, though one of these deletions is reverted in "A. chrysaetos".Numerous fossil taxa of eagles have been described. Many have been moved to other genera, but several appear to be correctly assigned to this genus:Whether ""Hieraaetus" edwardsi" (Middle -? Late Miocene of SW Europe) belongs into "Aquila" or the hawk-eagles (if the latter are indeed distinct) is unclear. Its initial name, ""Aquila" minuta" , is preoccupied by a junior synonym of the booted eagle, "A. minuta" .