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.
Erica
A number of increasingly detailed phylogenetic hypotheses for "Erica" have been published based on nuclear ribosomal and plastid DNA sequences. The closest relatives of "Erica" are "Daboecia" (one or two species) and "Calluna" (monospecific), representing the oldest surviving lineages of a, by inference, ancestrally Palearctic tribe Ericeae. The small number of European "Erica" species represent the oldest lineages of the genus, within which a single, order-of-magnitude more species-rich, African clade is nested. Within the African clade, Cape and Madagascan/Mascarene species respectively represent monophyletic groups.