Everything about Giraffidae totally explained
The giraffids are
ruminant artiodactyl mammals that share a common ancestor with
deer and
bovids. The biological
family Giraffidae, once a diverse group spread throughout
Eurasia and Africa, contains only two living members, the
giraffe and the
okapi. Both are confined to sub-saharan
Africa: the giraffe to the open savannas, and the okapi to the dense rainforest of the
Congo. The two species look very different on first sight, but share a number of common features, including a long, dark-coloured tongue, lobed canine teeth, and horns covered in skin, called "
ossicones".
Giraffids share many common features with other ruminants. They have cloven hooves and
cannon bones, much like bovids, and a complex, four-chambered stomach. They have no upper
incisors or
canines, replacing them with a tough, horny pad. There is an especially long
diastema between the front and cheek teeth. The latter are
selenodont, adapted for grinding up tough plant matter.
Like most other ruminants, the
dental formula for giraffids is:
The behavior of the two living species shows little commonality, probably because of their different habitats and ecology.
Their closest fossil relatives include the deer-like
palaeomerycids and the
climacocerids, many genera of the latter having once been identified as giraffes themselves.
Fossil records indicate that many other giraffids thrived between the
Miocene era (around 20 million years ago) and the recent past. One major group of extinct giraffids, the sivatheres, had enormous branching ossicones, and would have looked more like massive deer than giraffes.
Classification
ORDER ARTIODACTYLA
Image:Giraffe.zoo.500pix.jpg|Giraffe
Image:Helladotherium.jpg|Skeleton of Helladotherium, now extinct
Further Information
Get more info on 'Giraffidae'.
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