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Another method to prevent toppling entirely is to move suspended below the branch instead of balanced on top of it. Three-toed sloths [Bradypodidae|(Bradypus spp.)] are an excellent example of this behavior, as their hook-shaped claws are ideal for suspensory locomotion. Many primates move through the trees by brachiation, a familiar form of hanging and swinging from branch to branch commonly seen in primates like gibbons (Hylobates spp.). This movement requires grasping hands and a pectoral (shoulder
Differentiation of teeth in an individual
mammals (at least in terms of number of species!), the rodents, use their incisors in this manner, but chisel-like incisors followed by a diastema are also seen, for example, in lagomorphs (rabbits and pikas), hyraxes, some primates (e.g., the aye-aye; also in an extinct group, the plesiadapids), and in some members of a large, rodent-like group of early mammals (now extinct) called the multituberculates. Other modifications of incisors include the scalpel incisors of vampire bats, the tusks of elephants
the teeth look like an old-fashioned washboard, a condition referred to as loxodont. In the simplest cases, such as the tapir (above), it is still easy to identify protocone, paracone, metacone, and hypocone. In more extreme cases this is no longer possible. A common lophodont pattern in primates is for the surface of the tooth to be made up of two main transverse lophs, a condition called bilophodont or biscuspid (e.g., Cercopithecidae). In the baboon, below, the lophs run between protocone and paracone