![]() The baculum is usually longer in the Canoidea than in the Feloidea, although fossas have long bacula and giant pandas have short bacula. Order Carnivora (including members of many well-known families, such as ursids (bears), canids (dogs), pinnipeds ( walruses, seals, sea lions), procyonids (raccoons etc.), mustelids (otters, weasels, skunks and others)).Order Eulipotyphla (insectivores, including shrews and hedgehogs).Order Rodentia (rodents), though not in the related order Lagomorpha (rabbits, hares, etc.). ![]() Order Primates, although not in lorises, humans, spider monkeys, or woolly monkeys.Mammals having a penile bone (in males) and a clitoral bone (in females) include various eutherians: In some bat species, the baculum can also protect the urethra from compression. In carnivorans and primates, the length of the baculum appears to be influenced by postcopulatory sexual selection. The length of the baculum may be related to the duration of copulation in some species. A bone in the penis allows a male to mate for a long time with a female, which can be a distinct advantage in some mating strategies. Its evolution may be influenced by sexual selection, and its characteristics are sometimes used to differentiate between similar species. The baculum is used for copulation and varies in size and shape by species. The word baculum meant "stick" or "staff" in Latin and originated from Greek: βάκλον, baklon "stick". The homologue to the baculum in female mammals is known as the baubellum or os clitoridis (also os clitoris), a bone in the clitoris. The bone is located above the male urethra, and it aids sexual reproduction by maintaining sufficient stiffness during sexual penetration. The os penis arises from primordial cells within soft tissues of the penis, and its formation is largely under the influence of androgens. It is absent from the human penis, but present in the penises of some primates, such as the gorilla and chimpanzee. The baculum (also penis bone, penile bone, or os penis, os genitale or os priapi ) is a bone found in the penis of many placental mammals. Fossil baculum of a bear ( Indarctos) from the Miocene
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