Female estrus cycles occur every 15 days throughout the year, but are often irregular. Males show few sexual hormonal fluctuations.
Their funny, hornlike ossicones, orange-and-brown spots and iconic long necks beg an explanation. As such, the giraffe often comes up in discussions about evolution.
A tour through their relatives, living and extinct, reveals much about them.
Okapi Before delving into the past, a brief detour to the giraffe's closet living relative can shed some light on those ancestors. The okapi is the only other member of the giraffe family, Giraffidae.
The okapi grows much smaller than the giraffe, and has a shorter neck. Only the males have ossicones, which grow smaller than a giraffe's.
Eumeryx Eumeryx—or a close cousin of Eumeryx—was probably the ancestor of the even-toed ungulates a group of hoofed animals including the giraffe family. Eumeryx resembled a small modern deer. Neither the males nor the females had any kind of horns, antlers or ossicones.
It lived about 30 million years ago during a time period called the Oligocene. Climacoceras Climacoceras was the earliest undisputed member of Giraffidae. It lived in modern-day Kenya. Climacoceras resembled the modern okapi.
They did have antler-like ossicones, a defining feature of the giraffe family. As adults, Climacoceras grew to a height of 1. This species lived during the Miocene epoch, 15 million years ago. Giraffa jumae Giraffa jumae was most likely the direct ancestor of the modern giraffe.
They closely resembled modern giraffes, but grew about 1 meter taller.Evolutionary History of the Okapi the Colsest Relative of the Giraffe PAGES 2. WORDS View Full Essay. More essays like this: evolution of okapi, giraffe, holocene era.
Not sure what I'd do without @Kibin - Alfredo Alvarez, student @ Miami University. Exactly what I needed. 10 Fun Facts About Giraffes Share Flipboard Email The Closest Relative of the Giraffe is the Okapi.
The Okapi. Getty Images the Okapi looks like a cross between a zebra and a deer; the giveaways to its true evolutionary relationships are its slightly elongated neck and the Giraffe . Apr 11, · Just like the Okapi, the Pygmy Hippo was unknown to science until recently (in this case, the 19th century).
They look like smaller, cuter versions of the larger hippo, but they have somewhat different habits; for a start, they spend more time on land and live alone or in small groups, instead of gathering in huge herds like their larger relatives.
It's a zebra, it's a horse no, it's an okapi. Not discovered until the 20th century, the okapi's closest relative is actually the giraffe. One being the giraffe of the savannah, and the other being the elusive okapi of the dense rainforest.
The Okapi has adapted in a myriad of ways from its late ancestor the palaeotragus. Due to its environment of the dense Ituri rainforest, it's coat is adapted to be oily, allowing the rain to . A distant relative of today’s giraffes was a bit of an odd creature: It was about the size of a bull moose, but it had a long neck that could stretch both up to eat tree leaves and down to eat.