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The okapi is sometimes referred to as a living fossil, as it has existed as a species over a long geological time period, and morphologically resembles more primitive forms (e.g. Samotherium). [14] [21] In 2016, a genetic study found that the common ancestor of giraffe and okapi lived about 11.5 million years ago. [22]
The okapi's neck is long compared to most ruminants, but not nearly so long as the giraffe's. Male giraffes are the tallest of all mammals: their horns reach 5.5 m (18 ft) above the ground and their shoulder 3.3 m (11 ft), whereas the okapi has a shoulder height of 1.7 m (5 ft 7 in).
The giraffe genome is around 2.9 billion base pairs in length, compared to the 3.3 billion base pairs of the okapi. Of the proteins in giraffe and okapi genes, 19.4% are identical. The divergence of giraffe and okapi lineages dates to around 11.5 mya. A small group of regulatory genes in the giraffe appears responsible for the animal's height ...
Like the giraffe, the okapi uses its long, prehensile tongue to pluck leaves and buds from trees," the Cincinnati Zoo's website states. Okapis walk like giraffes, swinging forward both legs on the ...
The young okapi marks the 18th born at the Cincinnati Zoo since 1989. There are approximately 15,000 okapis globally, the zoo estimates. Habitat destruction and poaching have harmed the species ...
The calf is from a species called okapi, the only living relative of the giraffe, the zoo said in a news release. Okapis are from the rainforest of the Democratic Republic of Congo.
Giraffomorpha is a clade of pecoran ruminants containing the superfamilies Palaeomerycoidea (Palaeomerycidae) and Giraffoidea (Giraffidae, Prolibytheriidae and Climacoceratidae), of which the giraffe and okapi of the Giraffidae are the only extant members of the once-diverse clade as a result of a decline in diversity after the Miocene as a result of declines in temperatures.
In okapi, the male's ossicones are smaller in proportion to the head, and taper towards their tips, forming a sharper point than the comparatively blunt giraffe ossicone. Whereas female giraffes have reduced ossicones, female okapi lack ossicones entirely. The morphology of ossicones in the extinct relatives of giraffes and okapi varies widely.