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Ossicones of a giraffe Ossicones of a male okapi. Ossicones are columnar or conical skin-covered bone structures on the heads of giraffes, male okapi, and some of their extinct relatives. Ossicones are distinguished from the superficially similar structures of horns and antlers by their unique development and a permanent covering of skin and fur.
They carry out polygynous mating behavior, meaning a male mates with several females and suppresses all competition. The length of the gestation period varies from four to five months for porcine, deer, and musk deer; six to ten months for hippos, deer, and bovines; ten to thirteen months with camels; and fourteen to fifteen months with giraffes.
Most modern pecorans (with the exception of the Moschidae) have one of four types of cranial appendages: horns, antlers, ossicones, or pronghorns. [6] True horns have a bone core that is covered in a permanent sheath of keratin. They are indicative of Bovidae. Horns develop in the periosteum over the frontal bone, and can be curved or straight. [4]
Male okapis have short, hair-covered horn-like structures called ossicones, less than 15 cm (5.9 in) in length, which are similar in form and function to the ossicones of a giraffe. [26] The okapi exhibits sexual dimorphism , with females 4.2 cm (1.7 in) taller on average, slightly redder, and lacking prominent ossicones, instead possessing ...
The gerenuk [a] (Litocranius walleri), also known as the giraffe gazelle, is a long-necked, medium-sized antelope found in parts of East Africa. The sole member of the genus Litocranius , the gerenuk was first described by the naturalist Victor Brooke in 1879.
The reticulated giraffe (Giraffa reticulata [3] or Giraffa camelopardalis reticulata [4]) is a species/subspecies of giraffe native to the Horn of Africa.It is differentiated from other types of giraffe by its coat, which consists of large, polygonal (or squared), block-like spots, which extend onto the lower legs, tail and face.
South African giraffe (G. g. giraffa), also known as Cape giraffe Is found in northern South Africa , southern Botswana, southern Zimbabwe, Eswatini and south-western Mozambique . It has dark, somewhat rounded patches "with some fine projections" on a tawny background colour.
The northern giraffe (Giraffa camelopardalis), also known as three-horned giraffe, [2] is the type species of giraffe, G. camelopardalis, and is native to North Africa, although alternative taxonomic hypotheses have proposed the northern giraffe as a separate species.