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Though born with a deep black sheen, adult black springbok are two shades of chocolate-brown and develop a white marking on the face as they mature. While the lateral stripe is nearly black, the stripe on the rump is dark brown. The stripes on the flanks are dark brown to black, and the posterior stripes are moderately brown. The stripe near the rump is well-marked, and that on the flanks is deep brown.White springbok, as the name suggests, are predominantly white with a light tan stripe on the flanks. The medium brown forehead patch extends to eye level and is separated from the bright white face by a dark brown border. The forehead patch, dark brown or fawn, extends beyond the level of the eyes and mixes with the white of the face without any clear barriers. The forehead is brown, fawn, or white, the patch not extending beyond the eyes and having no sharp boundaries. The skin along the middle of the dorsal side is folded in, and covered with 15 to 20 cm (6 to 8 in) white hair erected by arrector pili muscles (located between hair follicles).The tail (except the terminal black tuft), buttocks, the insides of the legs and the rump are all white.
Both sexes have black horns, about 35–50 cm (14–20 in) long, that are straight at the base and then curve backward. Horns have a girth of 71–83 mm (2.8–3.3 in) at the base; this thins to 56–65 mm (2.2–2.6 in) towards the tip.The study pointed out that the saiga and the springbok could be considerably different from the rest of the antilopines; a 2007 phylogenetic study even suggested that the two form a clade sister to the gerenuk. marsupialis during the Pleistocene, about 100,000 years ago.